From 9e204e0dcccb4a1c9a0153822b4b0bdd22ad8fb6 Mon Sep 17 00:00:00 2001
From: Aram Drevekenin <aram@poor.dev>
Date: Thu, 3 Sep 2020 16:47:44 +0200
Subject: [PATCH] tests!

---
 Cargo.lock                                    | 127 +++++++++++++
 Cargo.toml                                    |   3 +
 src/main.rs                                   | 108 +++++++----
 src/os_input_output.rs                        |  32 ++--
 src/tests/binary_inputs.rs                    |   3 +
 src/tests/fakes.rs                            | 168 ++++++++++++++++++
 src/tests/integration.rs                      |  99 +++++++++++
 src/tests/mod.rs                              |   4 +
 src/tests/possible_inputs.rs                  |  33 ++++
 ...gration__split_terminals_vertically-2.snap |  24 +++
 ...gration__split_terminals_vertically-3.snap |  24 +++
 ...gration__split_terminals_vertically-4.snap |  24 +++
 ...tegration__split_terminals_vertically.snap |  24 +++
 ...tegration__starts_with_one_terminal-2.snap |  24 +++
 ...integration__starts_with_one_terminal.snap |  24 +++
 15 files changed, 674 insertions(+), 47 deletions(-)
 create mode 100644 src/tests/binary_inputs.rs
 create mode 100644 src/tests/fakes.rs
 create mode 100644 src/tests/integration.rs
 create mode 100644 src/tests/mod.rs
 create mode 100644 src/tests/possible_inputs.rs
 create mode 100644 src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-2.snap
 create mode 100644 src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-3.snap
 create mode 100644 src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-4.snap
 create mode 100644 src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically.snap
 create mode 100644 src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal-2.snap
 create mode 100644 src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal.snap

diff --git a/Cargo.lock b/Cargo.lock
index e0d91b4a..aaaec76b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -118,6 +118,20 @@ dependencies = [
  "cache-padded",
 ]
 
+[[package]]
+name = "console"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c0994e656bba7b922d8dd1245db90672ffb701e684e45be58f20719d69abc5a"
+dependencies = [
+ "encode_unicode",
+ "lazy_static",
+ "libc",
+ "terminal_size",
+ "termios",
+ "winapi",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.7.2"
@@ -129,6 +143,24 @@ dependencies = [
  "lazy_static",
 ]
 
+[[package]]
+name = "difference"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "524cbf6897b527295dff137cec09ecf3a05f4fddffd7dfcd1585403449e74198"
+
+[[package]]
+name = "dtoa"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "134951f4028bdadb9b84baf4232681efbf277da25144b9b0ad65df75946c422b"
+
+[[package]]
+name = "encode_unicode"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
+
 [[package]]
 name = "event-listener"
 version = "2.3.0"
@@ -283,6 +315,26 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "insta"
+version = "0.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "617e921abc813f96a3b00958c079e7bf1e2db998f8a04f1546dd967373a418ee"
+dependencies = [
+ "console",
+ "difference",
+ "lazy_static",
+ "serde",
+ "serde_json",
+ "serde_yaml",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc6f3ad7b9d11a0c00842ff8de1b60ee58661048eb8049ed33c73594f359d7e6"
+
 [[package]]
 name = "js-sys"
 version = "0.3.44"
@@ -313,6 +365,12 @@ version = "0.2.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
 
+[[package]]
+name = "linked-hash-map"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8dd5a6d5999d9907cda8ed67bbd137d3af8085216c2ac62de5be860bd41f304a"
+
 [[package]]
 name = "log"
 version = "0.4.11"
@@ -334,6 +392,7 @@ version = "0.1.0"
 dependencies = [
  "async-std",
  "futures",
+ "insta",
  "libc",
  "nix",
  "signal-hook",
@@ -446,6 +505,12 @@ version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
+[[package]]
+name = "ryu"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
+
 [[package]]
 name = "scoped-tls"
 version = "1.0.0"
@@ -458,6 +523,49 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f638d531eccd6e23b980caf34876660d38e265409d8e99b397ab71eb3612fad0"
 
+[[package]]
+name = "serde"
+version = "1.0.115"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e54c9a88f2da7238af84b5101443f0c0d0a3bbdc455e34a5c9497b1903ed55d5"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.115"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "609feed1d0a73cc36a0182a840a9b37b4a82f0b1150369f0536a9e3f2a31dc48"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "164eacbdb13512ec2745fb09d51fd5b22b0d65ed294a1dcf7285a360c80a675c"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "serde_yaml"
+version = "0.8.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae3e2dd40a7cdc18ca80db804b7f461a39bb721160a85c9a1fa30134bf3c02a5"
+dependencies = [
+ "dtoa",
+ "linked-hash-map",
+ "serde",
+ "yaml-rust",
+]
+
 [[package]]
 name = "signal-hook"
 version = "0.1.16"
@@ -528,6 +636,16 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "terminal_size"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a14cd9f8c72704232f0bfc8455c0e861f0ad4eb60cc9ec8a170e231414c1e13"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "termios"
 version = "0.3.2"
@@ -703,3 +821,12 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "yaml-rust"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39f0c922f1a334134dc2f7a8b67dc5d25f0735263feec974345ff706bcf20b0d"
+dependencies = [
+ "linked-hash-map",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 19033587..ac02214c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,3 +19,6 @@ futures = "0.3.5"
 [dependencies.async-std]
 version = "1.3.0"
 features = ["unstable"]
+
+[dev-dependencies]
+insta = "0.16.1"
diff --git a/src/main.rs b/src/main.rs
index f5fee096..f62d529a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,6 @@
+#[cfg(test)]
+mod tests;
+
 mod os_input_output;
 
 use ::std::fmt::{self, Display, Formatter};
@@ -14,7 +17,9 @@ use async_std::task::*;
 use ::std::pin::*;
 use std::sync::mpsc::{channel, Sender, Receiver};
 
-use crate::os_input_output::{get_os_input, OsInputOutput, OsApi};
+use crate::os_input_output::{get_os_input, OsApi};
+
+use vte::Perform;
 
 struct ReadFromPid {
     pid: RawFd,
@@ -32,16 +37,19 @@ impl ReadFromPid {
 
 impl Stream for ReadFromPid {
     type Item = Vec<u8>;
-    fn poll_next(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
+    fn poll_next(mut self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
         let mut read_buffer = [0; 115200];
-        let read_result = &self.os_input.read(self.pid, &mut read_buffer);
+        let pid = self.pid;
+        let read_result = &self.os_input.read_from_tty_stdout(pid, &mut read_buffer);
         match read_result {
             Ok(res) => {
-                // TODO: this might become an issue with multiple panes sending data simultaneously
-                // ...consider returning None if res == 0 and handling it in the task (or sending
-                // Poll::Pending?)
-                let res = Some(read_buffer[..=*res].to_vec());
-                return Poll::Ready(res)
+                if *res == 0 {
+                    // indicates end of file
+                    return Poll::Ready(None);
+                } else {
+                    let res = Some(read_buffer[..=*res].to_vec());
+                    return Poll::Ready(res);
+                }
             },
             Err(e) => {
                 match e {
@@ -59,8 +67,8 @@ impl Stream for ReadFromPid {
     }
 }
 
-#[derive(Clone, Debug)]
-struct TerminalCharacter {
+#[derive(Clone)]
+pub struct TerminalCharacter {
     pub character: char,
     pub ansi_code: Option<String>,
 }
@@ -106,7 +114,14 @@ impl Display for TerminalCharacter {
     }
 }
 
-struct TerminalOutput {
+impl ::std::fmt::Debug for TerminalCharacter {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.character);
+        Ok(())
+    }
+}
+
+pub struct TerminalOutput {
     pub pid: RawFd,
     pub characters: Vec<TerminalCharacter>,
     pub display_rows: u16,
@@ -155,7 +170,8 @@ impl TerminalOutput {
                 self.unhook();
             },
             VteEvent::OscDispatch(params, bell_terminated) => {
-                self.osc_dispatch(params, bell_terminated);
+                let params: Vec<&[u8]> = params.iter().map(|p| &p[..]).collect();
+                self.osc_dispatch(&params[..], bell_terminated);
             },
             VteEvent::CsiDispatch(params, intermediates, ignore, c) => {
                 self.csi_dispatch(&params, &intermediates, ignore, c);
@@ -337,6 +353,14 @@ impl TerminalOutput {
             (None, None) => 0
         }
     }
+    fn index_of_beginning_of_last_canonical_line (&self) -> usize {
+        if self.newline_indices.is_empty() {
+            0
+        } else {
+            // return last
+            *self.newline_indices.last().unwrap()
+        }
+    }
     fn index_of_beginning_of_line (&self, index_in_line: usize) -> usize {
         let last_newline_index = if self.newline_indices.is_empty() {
             None
@@ -404,8 +428,7 @@ impl TerminalOutput {
 
 const DEBUGGING: bool = false;
 
-// vte methods
-impl TerminalOutput {
+impl vte::Perform for TerminalOutput {
     fn print(&mut self, c: char) {
         if DEBUGGING {
             println!("\r[print] {:?}", c);
@@ -424,14 +447,15 @@ impl TerminalOutput {
                     self.characters.push(space_character.clone());
                 };
                 self.characters.push(terminal_character);
-            }
 
-            let start_of_last_line = self.index_of_beginning_of_line(self.cursor_position);
-            let difference_from_last_newline = self.cursor_position - start_of_last_line;
-            if difference_from_last_newline == self.display_cols as usize {
-                self.linebreak_indices.push(self.cursor_position);
+                let start_of_last_line = self.index_of_beginning_of_line(self.cursor_position);
+                let difference_from_last_newline = self.cursor_position - start_of_last_line;
+                if difference_from_last_newline == self.display_cols as usize {
+                    self.linebreak_indices.push(self.cursor_position);
+                }
             }
             self.cursor_position += 1;
+
         }
     }
 
@@ -478,9 +502,8 @@ impl TerminalOutput {
         }
     }
 
-    // fn osc_dispatch(&mut self, params: &[&[u8]], bell_terminated: bool) {
+    fn osc_dispatch(&mut self, params: &[&[u8]], bell_terminated: bool) {
     // TODO: normalize vec/slices for all of these methods and the enum
-    fn osc_dispatch(&mut self, params: Vec<Vec<u8>>, bell_terminated: bool) {
         if DEBUGGING {
             println!("\r[osc_dispatch] params={:?} bell_terminated={}", params, bell_terminated);
         }
@@ -503,7 +526,7 @@ impl TerminalOutput {
                     let param_string = params.iter().map(|p| p.to_string()).collect::<Vec<String>>().join(";");
                     self.pending_ansi_code = Some(format!("\u{1b}[{}m", param_string));
                 }
-            } else if c == 'C' { // move cursor
+            } else if c == 'C' { // move cursor forward
                 self.cursor_position += params[0] as usize; // TODO: negative value?
             } else if c == 'K' { // clear line (0 => right, 1 => left, 2 => all)
                 if params[0] == 0 {
@@ -527,6 +550,25 @@ impl TerminalOutput {
                     self.characters.truncate(self.cursor_position + 1);
                 }
                 // TODO: implement 1, 2, and 3
+            } else if c == 'H' { // goto row/col
+                let row = params[0] as usize - 1; // we subtract 1 here because this csi is 1 indexed and we index from 0
+                let col = params[1] as usize - 1;
+
+                match self.newline_indices.get(row as usize) {
+                    Some(index_of_next_row) => {
+                        let index_of_row = index_of_next_row - self.display_cols as usize;
+                        self.cursor_position = index_of_row + col as usize;
+                    }
+                    None => {
+                        let start_of_last_line = self.index_of_beginning_of_last_canonical_line();
+                        let num_of_lines_to_add = row - self.newline_indices.len();
+                        for i in 0..num_of_lines_to_add {
+                            self.newline_indices.push(start_of_last_line + ((i + 1) * self.display_cols as usize));
+                        }
+                        let index_of_row = self.newline_indices.last().unwrap_or(&0); // TODO: better
+                        self.cursor_position = index_of_row + col as usize;
+                    }
+                }
             }
         }
     }
@@ -542,7 +584,8 @@ impl TerminalOutput {
     }
 }
 
-enum VteEvent { // TODO: try not to allocate Vecs
+#[derive(Debug)]
+pub enum VteEvent { // TODO: try not to allocate Vecs
     Print(char),
     Execute(u8), // byte
     Hook(Vec<i64>, Vec<u8>, bool, char), // params, intermediates, ignore, char
@@ -643,6 +686,7 @@ fn split_horizontally_with_gap (rect: &Winsize) -> (Winsize, Winsize) {
     (first_rect, second_rect)
 }
 
+#[derive(Debug)]
 enum ScreenInstruction {
     Pty(RawFd, VteEvent),
     Render,
@@ -732,10 +776,10 @@ impl Screen {
         let terminal_output = self.terminals.get_mut(&pid).unwrap();
         terminal_output.handle_event(event);
     }
-    pub fn write_to_active_terminal(&self, byte: u8) {
+    pub fn write_to_active_terminal(&mut self, byte: u8) {
         if let Some(active_terminal_id) = &self.get_active_terminal_id() {
             let mut buffer = [byte];
-            self.os_api.write(*active_terminal_id, &mut buffer).expect("failed to write to terminal");
+            self.os_api.write_to_tty_stdin(*active_terminal_id, &mut buffer).expect("failed to write to terminal");
             self.os_api.tcdrain(*active_terminal_id).expect("failed to drain terminal");
         }
     }
@@ -747,6 +791,7 @@ impl Screen {
         let mut stdout = self.os_api.get_stdout_writer();
         for (_pid, terminal) in self.terminals.iter_mut() {
             if let Some(vte_output) = terminal.buffer_as_vte_output() {
+                // write boundaries
                 if terminal.x_coords + terminal.display_cols < self.full_screen_ws.ws_col {
                     let boundary_x_coords = terminal.x_coords + terminal.display_cols;
                     let mut vte_output_boundaries = String::new();
@@ -990,19 +1035,19 @@ impl PtyBus {
     }
 }
 
-fn main() {
+pub fn main() {
     let os_input = get_os_input();
-    start(os_input);
+    start(Box::new(os_input));
 }
 
-fn start(os_input: OsInputOutput) {
+pub fn start(mut os_input: Box<dyn OsApi>) {
     let mut active_threads = vec![];
 
     let full_screen_ws = os_input.get_terminal_size_using_fd(0);
     os_input.into_raw_mode(0);
-    let mut screen = Screen::new(&full_screen_ws, Box::new(os_input.clone()));
+    let mut screen = Screen::new(&full_screen_ws, os_input.clone());
     let send_screen_instructions = screen.send_screen_instructions.clone();
-    let mut pty_bus = PtyBus::new(send_screen_instructions.clone(), Box::new(os_input.clone()));
+    let mut pty_bus = PtyBus::new(send_screen_instructions.clone(), os_input.clone());
     let send_pty_instructions = pty_bus.send_pty_instructions.clone();
 
     active_threads.push(
@@ -1094,8 +1139,9 @@ fn start(os_input: OsInputOutput) {
     }
     // cleanup();
     let reset_style = "\u{1b}[m";
-    let goodbye_message = format!("\r{}Bye from Mosaic!", reset_style);
+    let goodbye_message = format!("\n\r{}Bye from Mosaic!", reset_style);
 
     os_input.get_stdout_writer().write(goodbye_message.as_bytes()).unwrap();
+    os_input.get_stdout_writer().flush().unwrap();
 
 }
diff --git a/src/os_input_output.rs b/src/os_input_output.rs
index f69a47a4..75c131c7 100644
--- a/src/os_input_output.rs
+++ b/src/os_input_output.rs
@@ -62,8 +62,8 @@ fn spawn_terminal () -> (RawFd, RawFd) {
                 let pid_primary = fork_pty_res.master;
                 let pid_secondary = match fork_pty_res.fork_result {
                     ForkResult::Parent { child } => {
-                        fcntl(pid_primary, FcntlArg::F_SETFL(OFlag::empty())).expect("could not fcntl");
-                        // fcntl(pid_primary, FcntlArg::F_SETFL(OFlag::O_NONBLOCK)).expect("could not fcntl");
+                        // fcntl(pid_primary, FcntlArg::F_SETFL(OFlag::empty())).expect("could not fcntl");
+                        fcntl(pid_primary, FcntlArg::F_SETFL(OFlag::O_NONBLOCK)).expect("could not fcntl");
                         child
                     },
                     ForkResult::Child => {
@@ -87,13 +87,13 @@ pub struct OsInputOutput {}
 
 pub trait OsApi: Send + Sync {
     fn get_terminal_size_using_fd(&self, pid: RawFd) -> Winsize;
-    fn set_terminal_size_using_fd(&self, pid: RawFd, cols: u16, rows: u16);
-    fn into_raw_mode(&self, pid: RawFd);
-    fn spawn_terminal(&self) -> (RawFd, RawFd);
-    fn read(&self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error>;
-    fn write(&self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error>;
-    fn tcdrain(&self, pid: RawFd) -> Result<(), nix::Error>;
-    fn kill(&self, pid: RawFd) -> Result<(), nix::Error>;
+    fn set_terminal_size_using_fd(&mut self, pid: RawFd, cols: u16, rows: u16);
+    fn into_raw_mode(&mut self, pid: RawFd);
+    fn spawn_terminal(&mut self) -> (RawFd, RawFd);
+    fn read_from_tty_stdout(&mut self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error>;
+    fn write_to_tty_stdin(&mut self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error>;
+    fn tcdrain(&mut self, pid: RawFd) -> Result<(), nix::Error>;
+    fn kill(&mut self, pid: RawFd) -> Result<(), nix::Error>;
     fn get_stdin_reader(&self) -> Box<dyn Read>;
     fn get_stdout_writer(&self) -> Box<dyn Write>;
     fn box_clone(&self) -> Box<dyn OsApi>;
@@ -103,22 +103,22 @@ impl OsApi for OsInputOutput {
     fn get_terminal_size_using_fd(&self, pid: RawFd) -> Winsize {
         get_terminal_size_using_fd(pid)
     }
-    fn set_terminal_size_using_fd(&self, pid: RawFd, cols: u16, rows: u16) {
+    fn set_terminal_size_using_fd(&mut self, pid: RawFd, cols: u16, rows: u16) {
         set_terminal_size_using_fd(pid, cols, rows);
     }
-    fn into_raw_mode(&self, pid: RawFd) {
+    fn into_raw_mode(&mut self, pid: RawFd) {
         into_raw_mode(pid);
     }
-    fn spawn_terminal(&self) -> (RawFd, RawFd) {
+    fn spawn_terminal(&mut self) -> (RawFd, RawFd) {
         spawn_terminal()
     }
-    fn read(&self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error> {
+    fn read_from_tty_stdout(&mut self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error> {
         read(pid, buf)
     }
-    fn write(&self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error> {
+    fn write_to_tty_stdin(&mut self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error> {
         write(pid, buf)
     }
-    fn tcdrain(&self, pid: RawFd) -> Result<(), nix::Error> {
+    fn tcdrain(&mut self, pid: RawFd) -> Result<(), nix::Error> {
         tcdrain(pid)
     }
     fn box_clone(&self) -> Box<dyn OsApi> {
@@ -135,7 +135,7 @@ impl OsApi for OsInputOutput {
         let stdout = ::std::io::stdout();
         Box::new(stdout)
     }
-    fn kill(&self, fd: RawFd) -> Result<(), nix::Error> {
+    fn kill(&mut self, fd: RawFd) -> Result<(), nix::Error> {
         kill(Pid::from_raw(fd), None)
     }
 }
diff --git a/src/tests/binary_inputs.rs b/src/tests/binary_inputs.rs
new file mode 100644
index 00000000..62194e3b
--- /dev/null
+++ b/src/tests/binary_inputs.rs
@@ -0,0 +1,3 @@
+pub const COL_121: &[u8] = &[27, 91, 49, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 50, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 51, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 52, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 53, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 54, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 55, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 56, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 57, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 48, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 49, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 50, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 51, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 52, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 53, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 54, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 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51, 56, 59, 53, 59, 51, 109, 126, 27, 91, 51, 56, 59, 53, 59, 51, 109, 47, 27, 91, 51, 56, 59, 53, 59, 51, 109, 99, 27, 91, 51, 56, 59, 53, 59, 51, 109, 47, 27, 91, 51, 56, 59, 53, 59, 51, 109, 109, 27, 91, 51, 56, 59, 53, 59, 51, 109, 111, 27, 91, 51, 56, 59, 53, 59, 51, 109, 115, 27, 91, 51, 56, 59, 53, 59, 51, 109, 97, 27, 91, 51, 56, 59, 53, 59, 51, 109, 105, 27, 91, 51, 56, 59, 53, 59, 51, 109, 99, 27, 91, 109, 32, 27, 91, 109, 111, 27, 91, 109, 110, 27, 91, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 109, 109, 27, 91, 51, 56, 59, 53, 59, 50, 109, 97, 27, 91, 51, 56, 59, 53, 59, 50, 109, 105, 27, 91, 51, 56, 59, 53, 59, 50, 109, 110, 27, 91, 109, 32, 27, 91, 109, 226, 168, 175, 27, 91, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 49, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 48, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 58, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 52, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 55, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 58, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 48, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 51, 13, 27, 91, 50, 52, 67];
+
+pub const COL_60: &[u8] = &[27, 91, 49, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 50, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 51, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 52, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 53, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 54, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 55, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 56, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 57, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 48, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 49, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 50, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 51, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 52, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 53, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 54, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 55, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 56, 59, 49, 72, 27, 91, 109, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 49, 57, 59, 49, 72, 27, 91, 109, 27, 91, 109, 87, 27, 91, 109, 101, 27, 91, 109, 108, 27, 91, 109, 99, 27, 91, 109, 111, 27, 91, 109, 109, 27, 91, 109, 101, 27, 91, 109, 32, 27, 91, 109, 116, 27, 91, 109, 111, 27, 91, 109, 32, 27, 91, 109, 102, 27, 91, 109, 105, 27, 91, 109, 115, 27, 91, 109, 104, 27, 91, 109, 44, 27, 91, 109, 32, 27, 91, 109, 116, 27, 91, 109, 104, 27, 91, 109, 101, 27, 91, 109, 32, 27, 91, 109, 102, 27, 91, 109, 114, 27, 91, 109, 105, 27, 91, 109, 101, 27, 91, 109, 110, 27, 91, 109, 100, 27, 91, 109, 108, 27, 91, 109, 121, 27, 91, 109, 32, 27, 91, 109, 105, 27, 91, 109, 110, 27, 91, 109, 116, 27, 91, 109, 101, 27, 91, 109, 114, 27, 91, 109, 97, 27, 91, 109, 99, 27, 91, 109, 116, 27, 91, 109, 105, 27, 91, 109, 118, 27, 91, 109, 101, 27, 91, 109, 32, 27, 91, 109, 115, 27, 91, 109, 104, 27, 91, 109, 101, 27, 91, 109, 108, 27, 91, 109, 108, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 27, 91, 50, 48, 59, 49, 72, 27, 91, 109, 27, 91, 52, 56, 59, 53, 59, 54, 109, 226, 139, 138, 27, 91, 52, 56, 59, 53, 59, 54, 109, 62, 27, 91, 109, 32, 27, 91, 51, 56, 59, 53, 59, 51, 109, 126, 27, 91, 51, 56, 59, 53, 59, 51, 109, 47, 27, 91, 51, 56, 59, 53, 59, 51, 109, 99, 27, 91, 51, 56, 59, 53, 59, 51, 109, 47, 27, 91, 51, 56, 59, 53, 59, 51, 109, 109, 27, 91, 51, 56, 59, 53, 59, 51, 109, 111, 27, 91, 51, 56, 59, 53, 59, 51, 109, 115, 27, 91, 51, 56, 59, 53, 59, 51, 109, 97, 27, 91, 51, 56, 59, 53, 59, 51, 109, 105, 27, 91, 51, 56, 59, 53, 59, 51, 109, 99, 27, 91, 109, 32, 27, 91, 109, 111, 27, 91, 109, 110, 27, 91, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 109, 109, 27, 91, 51, 56, 59, 53, 59, 50, 109, 97, 27, 91, 51, 56, 59, 53, 59, 50, 109, 105, 27, 91, 51, 56, 59, 53, 59, 50, 109, 110, 27, 91, 109, 32, 27, 91, 109, 226, 168, 175, 27, 91, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 32, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 49, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 57, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 58, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 52, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 48, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 58, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 48, 27, 91, 51, 56, 59, 53, 59, 50, 52, 48, 109, 48, 13, 27, 91, 50, 52, 67];
diff --git a/src/tests/fakes.rs b/src/tests/fakes.rs
new file mode 100644
index 00000000..a9893dcc
--- /dev/null
+++ b/src/tests/fakes.rs
@@ -0,0 +1,168 @@
+use ::std::time::Duration;
+use ::nix::pty::Winsize;
+use ::std::os::unix::io::RawFd;
+use ::std::io::{Read, Write};
+use ::std::collections::HashMap;
+use ::std::sync::{Arc, Mutex};
+
+use crate::os_input_output::OsApi;
+use crate::tests::possible_inputs::{Bytes, get_possible_inputs};
+
+#[derive(Clone)]
+pub enum IoEvent {
+    Kill(RawFd),
+    SetTerminalSizeUsingFd(RawFd, u16, u16),
+    IntoRawMode(RawFd),
+    TcDrain(RawFd),
+}
+
+pub struct FakeStdinReader {
+    pub input_chars: Bytes,
+}
+
+impl FakeStdinReader {
+    pub fn new(input_chars: Vec<u8>) -> Self {
+        let bytes = Bytes::new().content(input_chars);
+        FakeStdinReader {
+            input_chars: bytes,
+        }
+    }
+}
+
+impl Read for FakeStdinReader {
+    fn read(&mut self, buf: &mut [u8]) -> Result<usize, std::io::Error> {
+        ::std::thread::sleep(Duration::from_millis(1000)); // TODO: adjust duration
+        let read_position = self.input_chars.read_position;
+        buf[0] = self.input_chars.content[read_position];
+        self.input_chars.set_read_position(read_position + 1);
+        Ok(1)
+    }
+}
+
+#[derive(Clone, Default)]
+pub struct FakeStdoutWriter {
+    output_buffer: Arc<Mutex<Vec<u8>>>,
+    pub output_frames: Arc<Mutex<Vec<Vec<u8>>>>,
+}
+
+impl Write for FakeStdoutWriter {
+    fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
+        let mut bytes_written = 0;
+        let mut output_buffer = self.output_buffer.lock().unwrap();
+        for byte in buf {
+            bytes_written += 1;
+            output_buffer.push(*byte);
+        }
+        Ok(bytes_written)
+    }
+    fn flush(&mut self) -> Result<(), std::io::Error> {
+        let mut output_buffer = self.output_buffer.lock().unwrap();
+        let mut output_frames = self.output_frames.lock().unwrap();
+        let new_frame = output_buffer.drain(..).collect();
+        output_frames.push(new_frame);
+        Ok(())
+    }
+}
+
+#[derive(Clone)]
+pub struct FakeInputOutput {
+    read_buffers: Arc<Mutex<HashMap<RawFd, Bytes>>>,
+    input_to_add: Arc<Mutex<Option<Vec<u8>>>>,
+    stdin_writes: Arc<Mutex<HashMap<RawFd, Vec<u8>>>>,
+    pub stdout_writer: FakeStdoutWriter, // stdout_writer.output is already an arc/mutex
+    io_events: Arc<Mutex<Vec<IoEvent>>>,
+    win_sizes: Arc<Mutex<HashMap<RawFd, Winsize>>>,
+    possible_inputs: HashMap<u16, Bytes>,
+}
+
+impl FakeInputOutput {
+    pub fn new(winsize: Winsize) -> Self {
+        let mut win_sizes = HashMap::new();
+        win_sizes.insert(0 , winsize); // 0 is the current terminal
+        FakeInputOutput {
+            read_buffers: Arc::new(Mutex::new(HashMap::new())),
+            stdin_writes: Arc::new(Mutex::new(HashMap::new())),
+            input_to_add: Arc::new(Mutex::new(None)),
+            stdout_writer: FakeStdoutWriter::default(),
+            io_events: Arc::new(Mutex::new(vec![])),
+            win_sizes: Arc::new(Mutex::new(win_sizes)),
+            possible_inputs: get_possible_inputs(),
+        }
+    }
+    pub fn add_terminal_input(&mut self, input: &[u8]) {
+        self.input_to_add = Arc::new(Mutex::new(Some(input.to_vec())));
+    }
+    pub fn add_terminal(&mut self, fd: RawFd) {
+        self.stdin_writes.lock().unwrap().insert(fd, vec![]);
+    }
+}
+
+impl OsApi for FakeInputOutput {
+    fn get_terminal_size_using_fd(&self, pid: RawFd) -> Winsize {
+        let win_sizes = self.win_sizes.lock().unwrap();
+        let winsize = win_sizes.get(&pid).unwrap();
+        *winsize
+    }
+    fn set_terminal_size_using_fd(&mut self, pid: RawFd, cols: u16, rows: u16) {
+        let terminal_input = self.possible_inputs.get(&cols).expect(&format!("could not find input for size {:?}", cols));
+        self.read_buffers.lock().unwrap().insert(pid, terminal_input.clone());
+        self.io_events.lock().unwrap().push(IoEvent::SetTerminalSizeUsingFd(pid, cols, rows));
+    }
+    fn into_raw_mode(&mut self, pid: RawFd) {
+        self.io_events.lock().unwrap().push(IoEvent::IntoRawMode(pid));
+    }
+    fn spawn_terminal(&mut self) -> (RawFd, RawFd) {
+        let next_terminal_id = { self.read_buffers.lock().unwrap().keys().len() as RawFd + 1 };
+        self.add_terminal(next_terminal_id);
+        (next_terminal_id as i32, next_terminal_id + 1000) // secondary number is arbitrary here
+    }
+    fn read_from_tty_stdout(&mut self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error> {
+        let mut read_buffers = self.read_buffers.lock().unwrap();
+        let mut bytes_read = 0;
+        if let Some(bytes) = read_buffers.get_mut(&pid) {
+            for i in bytes.read_position..bytes.content.len() {
+                bytes_read += 1;
+                buf[i] = bytes.content[i];
+            }
+            if bytes_read > bytes.read_position {
+                bytes.set_read_position(bytes_read);
+            }
+        }
+        Ok(bytes_read)
+    }
+    fn write_to_tty_stdin(&mut self, pid: RawFd, buf: &mut [u8]) -> Result<usize, nix::Error> {
+        let mut stdin_writes = self.stdin_writes.lock().unwrap();
+        let write_buffer = stdin_writes.get_mut(&pid).unwrap();
+        let mut bytes_written = 0;
+        for byte in buf {
+            bytes_written += 1;
+            write_buffer.push(*byte);
+        }
+        Ok(bytes_written)
+    }
+    fn tcdrain(&mut self, pid: RawFd) -> Result<(), nix::Error> {
+        self.io_events.lock().unwrap().push(IoEvent::TcDrain(pid));
+        Ok(())
+    }
+    fn box_clone(&self) -> Box<dyn OsApi> {
+        Box::new((*self).clone())
+    }
+    fn get_stdin_reader(&self) -> Box<dyn Read> {
+        let mut input_chars = vec![0, 1, 2];
+        if let Some(input_to_add) = self.input_to_add.lock().unwrap().as_ref() {
+            for byte in input_to_add {
+                input_chars.push(*byte);
+            }
+        }
+        input_chars.push(17); // ctrl-q (quit)
+        let reader = FakeStdinReader::new(input_chars);
+        Box::new(reader)
+    }
+    fn get_stdout_writer(&self) -> Box<dyn Write> {
+        Box::new(self.stdout_writer.clone())
+    }
+    fn kill(&mut self, fd: RawFd) -> Result<(), nix::Error> {
+        self.io_events.lock().unwrap().push(IoEvent::Kill(fd));
+        Ok(())
+    }
+}
diff --git a/src/tests/integration.rs b/src/tests/integration.rs
new file mode 100644
index 00000000..6acbf1aa
--- /dev/null
+++ b/src/tests/integration.rs
@@ -0,0 +1,99 @@
+use ::nix::pty::Winsize;
+use ::insta::assert_snapshot;
+
+use crate::{start, TerminalOutput};
+use crate::tests::fakes::{FakeInputOutput};
+
+pub fn get_fake_os_input () -> FakeInputOutput {
+    let fake_win_size = Winsize {
+        ws_col: 121,
+        ws_row: 20,
+        ws_xpixel: 0,
+        ws_ypixel: 0,
+    };
+    FakeInputOutput::new(fake_win_size)
+}
+
+#[test]
+pub fn starts_with_one_terminal () {
+    let mut fake_input_output = get_fake_os_input();
+    fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
+    start(Box::new(fake_input_output.clone()));
+
+    let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
+    let mut vte_parser = vte::Parser::new();
+    let main_pid = 0;
+    let x = 0;
+    let fake_win_size = Winsize { // TODO: combine with above
+        ws_col: 121,
+        ws_row: 20,
+        ws_xpixel: 0,
+        ws_ypixel: 0,
+    };
+    let mut terminal_output = TerminalOutput::new(main_pid, fake_win_size, x);
+
+    for frame in output_frames.iter() {
+        for byte in frame.iter() {
+            vte_parser.advance(&mut terminal_output, *byte);
+        }
+        let output_lines = terminal_output.read_buffer_as_lines();
+        let cursor_position_in_last_line = terminal_output.cursor_position_in_last_line();
+        let mut snapshot = String::new();
+        for (line_index, line) in output_lines.iter().enumerate() {
+            for (character_index, terminal_character) in line.iter().enumerate() {
+                if line_index == output_lines.len() - 1 && character_index == cursor_position_in_last_line {
+                    snapshot.push('█');
+                } else {
+                    snapshot.push(terminal_character.character);
+                }
+            }
+            if line_index != output_lines.len() - 1 {
+                snapshot.push('\n');
+            }
+        }
+        assert_snapshot!(snapshot);
+    }
+}
+
+#[test]
+pub fn split_terminals_vertically() {
+    // TODO: this test is a little flaky - there's some sort of race condition that makes the
+    // second terminal in the split appear blank sometimes - fix this
+    let mut fake_input_output = get_fake_os_input();
+    fake_input_output.add_terminal_input(&[14, 17]); // split-vertically and quit (ctrl-n + ctrl-q)
+    start(Box::new(fake_input_output.clone()));
+
+    let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
+    let mut vte_parser = vte::Parser::new();
+    let main_pid = 0;
+    let x = 0;
+    let fake_win_size = Winsize { // TODO: combine with above
+        ws_col: 121,
+        ws_row: 20,
+        ws_xpixel: 0,
+        ws_ypixel: 0,
+    };
+    let mut terminal_output = TerminalOutput::new(main_pid, fake_win_size, x);
+
+    for frame in output_frames.iter() {
+        for byte in frame.iter() {
+            vte_parser.advance(&mut terminal_output, *byte);
+        }
+        let output_lines = terminal_output.read_buffer_as_lines();
+        let cursor_position_in_last_line = terminal_output.cursor_position_in_last_line();
+        let mut snapshot = String::new();
+        for (line_index, line) in output_lines.iter().enumerate() {
+            for (character_index, terminal_character) in line.iter().enumerate() {
+                if line_index == output_lines.len() - 1 && character_index == cursor_position_in_last_line {
+                    snapshot.push('█');
+                } else {
+                    snapshot.push(terminal_character.character);
+                }
+            }
+            if line_index != output_lines.len() - 1 {
+                snapshot.push('\n');
+            }
+        }
+        assert_snapshot!(snapshot);
+    }
+}
diff --git a/src/tests/mod.rs b/src/tests/mod.rs
new file mode 100644
index 00000000..15c2ef0c
--- /dev/null
+++ b/src/tests/mod.rs
@@ -0,0 +1,4 @@
+pub mod integration;
+pub mod possible_inputs;
+pub mod binary_inputs;
+pub mod fakes;
diff --git a/src/tests/possible_inputs.rs b/src/tests/possible_inputs.rs
new file mode 100644
index 00000000..5f1ef874
--- /dev/null
+++ b/src/tests/possible_inputs.rs
@@ -0,0 +1,33 @@
+use std::collections::HashMap;
+use crate::tests::binary_inputs::{COL_121, COL_60};
+
+#[derive(Clone)]
+pub struct Bytes {
+    pub content: Vec<u8>,
+    pub read_position: usize,
+}
+
+impl Bytes {
+    pub fn new() -> Self {
+        Bytes {
+            content: vec![],
+            read_position: 0
+        }
+    }
+    pub fn content(mut self, content: Vec<u8>) -> Self {
+        self.content = content;
+        self
+    }
+    pub fn set_read_position(&mut self, read_position: usize) {
+        self.read_position = read_position;
+    }
+}
+
+pub fn get_possible_inputs () -> HashMap<u16, Bytes> { // the key is the column count for this terminal input
+    let mut possible_inputs = HashMap::new();
+    let col_60_bytes = Bytes::new().content(Vec::from(COL_60));
+    let col_121_bytes = Bytes::new().content(Vec::from(COL_121));
+    possible_inputs.insert(121, col_121_bytes);
+    possible_inputs.insert(60, col_60_bytes);
+    possible_inputs
+}
diff --git a/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-2.snap b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-2.snap
new file mode 100644
index 00000000..20d74b27
--- /dev/null
+++ b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-2.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration.rs
+expression: snapshot
+---
+                                                                                                                         
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+Welcome to fish, the friendly interactive shell             │                                                            
+                                                            │                                                            
+                                                            │                                                            
+⋊> ~/c/mosaic on main ⨯                                     │                                                            
diff --git a/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-3.snap b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-3.snap
new file mode 100644
index 00000000..a110ee36
--- /dev/null
+++ b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-3.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration.rs
+expression: snapshot
+---
+                                                                                                                         
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+Welcome to fish, the friendly interactive shell             │                                                            
+                                                            │                                                            
+                                                            │Welcome to fish, the friendly interactive shell             
+⋊> ~/c/mosaic on main ⨯                                     │⋊> ~/c/mosaic on main ⨯ █                           19:40:00
diff --git a/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-4.snap b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-4.snap
new file mode 100644
index 00000000..a0e55f1a
--- /dev/null
+++ b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically-4.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration.rs
+expression: snapshot
+---
+                                                                                                                         
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+                                                            │                                                            
+Welcome to fish, the friendly interactive shell             │                                                            
+                                                            │                                                            
+                                                            │Welcome to fish, the friendly interactive shell             
+⋊> ~/c/mosaic on main ⨯                                     │⋊> ~/c/mosaic on main ⨯                             19:40:00
+Bye from Mosaic!                                                                                                         
diff --git a/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically.snap b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically.snap
new file mode 100644
index 00000000..ed307b43
--- /dev/null
+++ b/src/tests/snapshots/mosaic__tests__integration__split_terminals_vertically.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration.rs
+expression: snapshot
+---
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+Welcome to fish, the friendly interactive shell                                                                          
+⋊> ~/c/mosaic on main ⨯ █                                                                                        10:47:03
diff --git a/src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal-2.snap b/src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal-2.snap
new file mode 100644
index 00000000..a4898030
--- /dev/null
+++ b/src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal-2.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration.rs
+expression: snapshot
+---
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+Welcome to fish, the friendly interactive shell                                                                          
+⋊> ~/c/mosaic on main ⨯                                                                                          10:47:03
+Bye from Mosaic!                                                                                                         
diff --git a/src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal.snap b/src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal.snap
new file mode 100644
index 00000000..ed307b43
--- /dev/null
+++ b/src/tests/snapshots/mosaic__tests__integration__starts_with_one_terminal.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration.rs
+expression: snapshot
+---
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+                                                                                                                         
+Welcome to fish, the friendly interactive shell                                                                          
+⋊> ~/c/mosaic on main ⨯ █                                                                                        10:47:03