Add first snapshot tests using insta (#2813)

Cargo.lock

@@ -498,6 +498,18 @@ dependencies = [
  "static_assertions",
 ]
 
+[[package]]
+name = "console"
+version = "0.15.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "054ccb5b10f9f2cbf51eb355ca1d05c2d279ce1804688d0db74b4733a5aeafd8"
+dependencies = [
+ "encode_unicode",
+ "libc",
+ "once_cell",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "const-oid"
 version = "0.9.6"
@@ -910,6 +922,12 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "encode_unicode"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34aa73646ffb006b8f5147f3dc182bd4bcb190227ce861fc4a4844bf8e3cb2c0"
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.35"
@@ -1314,7 +1332,9 @@ dependencies = [
  "filetreelist",
  "fuzzy-matcher",
  "gh-emoji",
+ "git2-testing",
  "indexmap",
+ "insta",
  "itertools",
  "log",
  "notify",
@@ -2408,6 +2428,18 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "insta"
+version = "1.44.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5c943d4415edd8153251b6f197de5eb1640e56d84e8d9159bea190421c73698"
+dependencies = [
+ "console",
+ "once_cell",
+ "regex",
+ "similar",
+]
+
 [[package]]
 name = "instability"
 version = "0.3.6"
@@ -3881,6 +3913,12 @@ dependencies = [
  "rand_core",
 ]
 
+[[package]]
+name = "similar"
+version = "2.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbbb5d9659141646ae647b42fe094daf6c6192d1620870b449d9557f748b2daa"
+
 [[package]]
 name = "simplelog"
 version = "0.12.2"

Cargo.toml

@@ -76,6 +76,8 @@ which = "8.0"
 
 [dev-dependencies]
 env_logger = "0.11"
+git2-testing = { path = "./git2-testing" }
+insta = { version = "1.41.0", features = ["filters"] }
 pretty_assertions = "1.4"
 tempfile = "3"
 

git2-testing/src/lib.rs

@@ -20,13 +20,18 @@ pub fn repo_init_empty() -> (TempDir, Repository) {
 	(td, repo)
 }
 
-/// initialize test repo in temp path with an empty first commit
-pub fn repo_init() -> (TempDir, Repository) {
+/// initialize test repo in temp path with given suffix and an empty first commit
+pub fn repo_init_suffix<T: AsRef<std::ffi::OsStr>>(
+	suffix: Option<T>,
+) -> (TempDir, Repository) {
 	init_log();
 
 	sandbox_config_files();
 
-	let td = TempDir::new().unwrap();
+	let td = match suffix {
+		Some(suffix) => TempDir::with_suffix(suffix).unwrap(),
+		None => TempDir::new().unwrap(),
+	};
 	let repo = Repository::init(td.path()).unwrap();
 	{
 		let mut config = repo.config().unwrap();
@@ -45,6 +50,11 @@ pub fn repo_init() -> (TempDir, Repository) {
 	(td, repo)
 }
 
+/// initialize test repo in temp path with an empty first commit
+pub fn repo_init() -> (TempDir, Repository) {
+	repo_init_suffix::<&std::ffi::OsStr>(None)
+}
+
 // init log
 fn init_log() {
 	let _ = env_logger::builder()

src/gitui.rs

@@ -0,0 +1,290 @@
+use std::time::Instant;
+
+use anyhow::Result;
+use asyncgit::{sync::utils::repo_work_dir, AsyncGitNotification};
+use crossbeam_channel::{never, tick, unbounded, Receiver};
+use scopetime::scope_time;
+
+#[cfg(test)]
+use crossterm::event::{KeyCode, KeyModifiers};
+
+use crate::{
+	app::{App, QuitState},
+	args::CliArgs,
+	draw,
+	input::{Input, InputEvent, InputState},
+	keys::KeyConfig,
+	select_event,
+	spinner::Spinner,
+	ui::style::Theme,
+	watcher::RepoWatcher,
+	AsyncAppNotification, AsyncNotification, QueueEvent, Updater,
+	SPINNER_INTERVAL, TICK_INTERVAL,
+};
+
+pub struct Gitui {
+	app: crate::app::App,
+	rx_input: Receiver<InputEvent>,
+	rx_git: Receiver<AsyncGitNotification>,
+	rx_app: Receiver<AsyncAppNotification>,
+	rx_ticker: Receiver<Instant>,
+	rx_watcher: Receiver<()>,
+}
+
+impl Gitui {
+	pub(crate) fn new(
+		cliargs: CliArgs,
+		theme: Theme,
+		key_config: &KeyConfig,
+		updater: Updater,
+	) -> Result<Self, anyhow::Error> {
+		let (tx_git, rx_git) = unbounded();
+		let (tx_app, rx_app) = unbounded();
+
+		let input = Input::new();
+
+		let (rx_ticker, rx_watcher) = match updater {
+			Updater::NotifyWatcher => {
+				let repo_watcher = RepoWatcher::new(
+					repo_work_dir(&cliargs.repo_path)?.as_str(),
+				);
+
+				(never(), repo_watcher.receiver())
+			}
+			Updater::Ticker => (tick(TICK_INTERVAL), never()),
+		};
+
+		let app = App::new(
+			cliargs,
+			tx_git,
+			tx_app,
+			input.clone(),
+			theme,
+			key_config.clone(),
+		)?;
+
+		Ok(Self {
+			app,
+			rx_input: input.receiver(),
+			rx_git,
+			rx_app,
+			rx_ticker,
+			rx_watcher,
+		})
+	}
+
+	pub(crate) fn run_main_loop<B: ratatui::backend::Backend>(
+		&mut self,
+		terminal: &mut ratatui::Terminal<B>,
+	) -> Result<QuitState, anyhow::Error>
+	where
+		<B as ratatui::backend::Backend>::Error:
+			'static + Send + Sync,
+	{
+		let spinner_ticker = tick(SPINNER_INTERVAL);
+		let mut spinner = Spinner::default();
+		let mut first_update = true;
+
+		self.app.update()?;
+
+		loop {
+			let event = if first_update {
+				first_update = false;
+				QueueEvent::Notify
+			} else {
+				select_event(
+					&self.rx_input,
+					&self.rx_git,
+					&self.rx_app,
+					&self.rx_ticker,
+					&self.rx_watcher,
+					&spinner_ticker,
+				)?
+			};
+
+			{
+				if matches!(event, QueueEvent::SpinnerUpdate) {
+					spinner.update();
+					spinner.draw(terminal)?;
+					continue;
+				}
+
+				scope_time!("loop");
+
+				match event {
+					QueueEvent::InputEvent(ev) => {
+						if matches!(
+							ev,
+							InputEvent::State(InputState::Polling)
+						) {
+							//Note: external ed closed, we need to re-hide cursor
+							terminal.hide_cursor()?;
+						}
+						self.app.event(ev)?;
+					}
+					QueueEvent::Tick | QueueEvent::Notify => {
+						self.app.update()?;
+					}
+					QueueEvent::AsyncEvent(ev) => {
+						if !matches!(
+							ev,
+							AsyncNotification::Git(
+								AsyncGitNotification::FinishUnchanged
+							)
+						) {
+							self.app.update_async(ev)?;
+						}
+					}
+					QueueEvent::SpinnerUpdate => unreachable!(),
+				}
+
+				self.draw(terminal)?;
+
+				spinner.set_state(self.app.any_work_pending());
+				spinner.draw(terminal)?;
+
+				if self.app.is_quit() {
+					break;
+				}
+			}
+		}
+
+		Ok(self.app.quit_state())
+	}
+
+	fn draw<B: ratatui::backend::Backend>(
+		&self,
+		terminal: &mut ratatui::Terminal<B>,
+	) -> Result<(), B::Error> {
+		draw(terminal, &self.app)
+	}
+
+	#[cfg(test)]
+	fn update_async(&mut self, event: crate::AsyncNotification) {
+		self.app.update_async(event).unwrap();
+	}
+
+	#[cfg(test)]
+	fn input_event(
+		&mut self,
+		code: KeyCode,
+		modifiers: KeyModifiers,
+	) {
+		let event = crossterm::event::KeyEvent::new(code, modifiers);
+		self.app
+			.event(crate::input::InputEvent::Input(
+				crossterm::event::Event::Key(event),
+			))
+			.unwrap();
+	}
+
+	#[cfg(test)]
+	fn wait_for_async_git_notification(
+		&self,
+		expected: AsyncGitNotification,
+	) {
+		loop {
+			let actual = self
+				.rx_git
+				.recv_timeout(std::time::Duration::from_millis(100))
+				.unwrap();
+
+			if actual == expected {
+				break;
+			}
+		}
+	}
+
+	#[cfg(test)]
+	fn update(&mut self) {
+		self.app.update().unwrap();
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use std::path::PathBuf;
+
+	use asyncgit::{sync::RepoPath, AsyncGitNotification};
+	use crossterm::event::{KeyCode, KeyModifiers};
+	use git2_testing::repo_init_suffix;
+	use insta::assert_snapshot;
+	use ratatui::{backend::TestBackend, Terminal};
+
+	use crate::{
+		args::CliArgs, gitui::Gitui, keys::KeyConfig,
+		ui::style::Theme, AsyncNotification, Updater,
+	};
+
+	// Macro adapted from: https://insta.rs/docs/cmd/
+	macro_rules! apply_common_filters {
+		{} => {
+			let mut settings = insta::Settings::clone_current();
+			// Windows and MacOS
+			// We don't match on the full path, but on the suffix we pass to `repo_init_suffix` below.
+			settings.add_filter(r" *\[…\]\S+-insta/?", "[TEMP_FILE]");
+			// Linux Temp Folder
+			settings.add_filter(r" */tmp/\.tmp\S+-insta/", "[TEMP_FILE]");
+			// Commit ids that follow a vertical bar
+			settings.add_filter(r"│[a-z0-9]{7} ", "│[AAAAA] ");
+			let _bound = settings.bind_to_scope();
+		}
+	}
+
+	#[test]
+	fn gitui_starts() {
+		apply_common_filters!();
+
+		let (temp_dir, _repo) = repo_init_suffix(Some("-insta"));
+		let path: RepoPath = temp_dir.path().to_str().unwrap().into();
+		let cliargs = CliArgs {
+			theme: PathBuf::from("theme.ron"),
+			select_file: None,
+			repo_path: path,
+			notify_watcher: false,
+			key_bindings_path: None,
+			key_symbols_path: None,
+		};
+
+		let theme = Theme::init(&PathBuf::new());
+		let key_config = KeyConfig::default();
+
+		let mut gitui =
+			Gitui::new(cliargs, theme, &key_config, Updater::Ticker)
+				.unwrap();
+
+		let mut terminal =
+			Terminal::new(TestBackend::new(90, 12)).unwrap();
+
+		gitui.draw(&mut terminal).unwrap();
+
+		assert_snapshot!("app_loading", terminal.backend());
+
+		let event =
+			AsyncNotification::Git(AsyncGitNotification::Status);
+		gitui.update_async(event);
+
+		gitui.draw(&mut terminal).unwrap();
+
+		assert_snapshot!("app_loading_finished", terminal.backend());
+
+		gitui.input_event(KeyCode::Char('2'), KeyModifiers::empty());
+		gitui.input_event(
+			key_config.keys.tab_log.code,
+			key_config.keys.tab_log.modifiers,
+		);
+
+		gitui.wait_for_async_git_notification(
+			AsyncGitNotification::Log,
+		);
+
+		gitui.update();
+
+		gitui.draw(&mut terminal).unwrap();
+
+		assert_snapshot!(
+			"app_log_tab_showing_one_commit",
+			terminal.backend()
+		);
+	}
+}

src/main.rs

@@ -65,6 +65,7 @@ mod bug_report;
 mod clipboard;
 mod cmdbar;
 mod components;
+mod gitui;
 mod input;
 mod keys;
 mod notify_mutex;
@@ -85,12 +86,9 @@ use crate::{
 };
 use anyhow::{anyhow, bail, Result};
 use app::QuitState;
-use asyncgit::{
-	sync::{utils::repo_work_dir, RepoPath},
-	AsyncGitNotification,
-};
+use asyncgit::{sync::RepoPath, AsyncGitNotification};
 use backtrace::Backtrace;
-use crossbeam_channel::{never, tick, unbounded, Receiver, Select};
+use crossbeam_channel::{Receiver, Select};
 use crossterm::{
 	terminal::{
 		disable_raw_mode, enable_raw_mode, EnterAlternateScreen,
@@ -98,12 +96,11 @@ use crossterm::{
 	},
 	ExecutableCommand,
 };
-use input::{Input, InputEvent, InputState};
+use gitui::Gitui;
+use input::InputEvent;
 use keys::KeyConfig;
 use ratatui::backend::CrosstermBackend;
 use scopeguard::defer;
-use scopetime::scope_time;
-use spinner::Spinner;
 use std::{
 	io::{self, Stdout},
 	panic,
@@ -111,7 +108,6 @@ use std::{
 	time::{Duration, Instant},
 };
 use ui::style::Theme;
-use watcher::RepoWatcher;
 
 type Terminal = ratatui::Terminal<CrosstermBackend<io::Stdout>>;
 
@@ -187,7 +183,6 @@ fn main() -> Result<()> {
 
 	let mut terminal =
 		start_terminal(io::stdout(), &cliargs.repo_path)?;
-	let input = Input::new();
 
 	let updater = if cliargs.notify_watcher {
 		Updater::NotifyWatcher
@@ -202,8 +197,7 @@ fn main() -> Result<()> {
 			app_start,
 			args.clone(),
 			theme.clone(),
-			key_config.clone(),
-			&input,
+			&key_config,
 			updater,
 			&mut terminal,
 		)?;
@@ -230,106 +224,15 @@ fn run_app(
 	app_start: Instant,
 	cliargs: CliArgs,
 	theme: Theme,
-	key_config: KeyConfig,
-	input: &Input,
+	key_config: &KeyConfig,
 	updater: Updater,
 	terminal: &mut Terminal,
 ) -> Result<QuitState, anyhow::Error> {
-	let (tx_git, rx_git) = unbounded();
-	let (tx_app, rx_app) = unbounded();
-
-	let rx_input = input.receiver();
-
-	let (rx_ticker, rx_watcher) = match updater {
-		Updater::NotifyWatcher => {
-			let repo_watcher = RepoWatcher::new(
-				repo_work_dir(&cliargs.repo_path)?.as_str(),
-			);
-
-			(never(), repo_watcher.receiver())
-		}
-		Updater::Ticker => (tick(TICK_INTERVAL), never()),
-	};
-
-	let spinner_ticker = tick(SPINNER_INTERVAL);
-
-	let mut app = App::new(
-		cliargs,
-		tx_git,
-		tx_app,
-		input.clone(),
-		theme,
-		key_config,
-	)?;
-
-	let mut spinner = Spinner::default();
-	let mut first_update = true;
+	let mut gitui = Gitui::new(cliargs, theme, key_config, updater)?;
 
 	log::trace!("app start: {} ms", app_start.elapsed().as_millis());
 
-	loop {
-		let event = if first_update {
-			first_update = false;
-			QueueEvent::Notify
-		} else {
-			select_event(
-				&rx_input,
-				&rx_git,
-				&rx_app,
-				&rx_ticker,
-				&rx_watcher,
-				&spinner_ticker,
-			)?
-		};
-
-		{
-			if matches!(event, QueueEvent::SpinnerUpdate) {
-				spinner.update();
-				spinner.draw(terminal)?;
-				continue;
-			}
-
-			scope_time!("loop");
-
-			match event {
-				QueueEvent::InputEvent(ev) => {
-					if matches!(
-						ev,
-						InputEvent::State(InputState::Polling)
-					) {
-						//Note: external ed closed, we need to re-hide cursor
-						terminal.hide_cursor()?;
-					}
-					app.event(ev)?;
-				}
-				QueueEvent::Tick | QueueEvent::Notify => {
-					app.update()?;
-				}
-				QueueEvent::AsyncEvent(ev) => {
-					if !matches!(
-						ev,
-						AsyncNotification::Git(
-							AsyncGitNotification::FinishUnchanged
-						)
-					) {
-						app.update_async(ev)?;
-					}
-				}
-				QueueEvent::SpinnerUpdate => unreachable!(),
-			}
-
-			draw(terminal, &app)?;
-
-			spinner.set_state(app.any_work_pending());
-			spinner.draw(terminal)?;
-
-			if app.is_quit() {
-				break;
-			}
-		}
-	}
-
-	Ok(app.quit_state())
+	gitui.run_main_loop(terminal)
 }
 
 fn setup_terminal() -> Result<()> {
@@ -353,7 +256,10 @@ fn shutdown_terminal() {
 	}
 }
 
-fn draw(terminal: &mut Terminal, app: &App) -> io::Result<()> {
+fn draw<B: ratatui::backend::Backend>(
+	terminal: &mut ratatui::Terminal<B>,
+	app: &App,
+) -> Result<(), B::Error> {
 	if app.requires_redraw() {
 		terminal.clear()?;
 	}

src/snapshots/gitui__gitui__tests__app_loading.snap

@@ -0,0 +1,17 @@
+---
+source: src/gitui.rs
+expression: terminal.backend()
+snapshot_kind: text
+---
+"  Status [1]  |  Log [2]  |  Files [3]  |  Stashing [4]  |  Stashes [5][TEMP_FILE] "
+" ──────────────────────────────────────────────────────────────────────────────────────── "
+"┌Unstaged Changes───────────────────────────┐┌Diff: ─────────────────────────────────────┐"
+"│Loading ...                                ││                                           │"
+"│                                           ││                                           │"
+"│                                           ││                                           │"
+"└───────────────────────────────────{master}┘│                                           │"
+"┌Staged Changes─────────────────────────────┐│                                           │"
+"│Loading ...                                ││                                           │"
+"│                                           ││                                           │"
+"└───────────────────────────────────────────┘└───────────────────────────────────────────┘"
+"                                                                                          "

src/snapshots/gitui__gitui__tests__app_loading_finished.snap

@@ -0,0 +1,17 @@
+---
+source: src/gitui.rs
+expression: terminal.backend()
+snapshot_kind: text
+---
+"  Status [1]  |  Log [2]  |  Files [3]  |  Stashing [4]  |  Stashes [5][TEMP_FILE] "
+" ──────────────────────────────────────────────────────────────────────────────────────── "
+"┌Unstaged Changes───────────────────────────┐┌Diff: ─────────────────────────────────────┐"
+"│                                           ││                                           │"
+"│                                           ││                                           │"
+"│                                           ││                                           │"
+"└───────────────────────────────────{master}┘│                                           │"
+"┌Staged Changes─────────────────────────────┐│                                           │"
+"│                                           ││                                           │"
+"│                                           ││                                           │"
+"└───────────────────────────────────────────┘└───────────────────────────────────────────┘"
+"Branches [b] Push [p] Fetch [⇧F] Pull [f] Undo Commit [⇧U] Submodules [⇧S]        more [.]"

src/snapshots/gitui__gitui__tests__app_log_tab_showing_one_commit.snap

@@ -0,0 +1,17 @@
+---
+source: src/gitui.rs
+expression: terminal.backend()
+snapshot_kind: text
+---
+"  Status [1]  |  Log [2]  |  Files [3]  |  Stashing [4]  |  Stashes [5][TEMP_FILE] "
+" ──────────────────────────────────────────────────────────────────────────────────────── "
+"┌Commit 1/1──────────────────────────────────────────────────────────────────────────────┐"
+"│[AAAAA] <1m ago    name                  initial                                        █"
+"│                                                                                        ║"
+"│                                                                                        ║"
+"│                                                                                        ║"
+"│                                                                                        ║"
+"│                                                                                        ║"
+"│                                                                                        ║"
+"└────────────────────────────────────────────────────────────────────────────────────────┘"
+"Scroll [↑↓] Mark [˽] Details [⏎] Branches [b] Compare [⇧C] Copy Hash [y] Tag [t]  more [.]"

src/spinner.rs

@@ -1,8 +1,5 @@
-use ratatui::{
-	backend::{Backend, CrosstermBackend},
-	Terminal,
-};
-use std::{cell::Cell, char, io};
+use ratatui::{backend::Backend, Terminal};
+use std::{cell::Cell, char};
 
 // static SPINNER_CHARS: &[char] = &['◢', '◣', '◤', '◥'];
 // static SPINNER_CHARS: &[char] = &['⢹', '⢺', '⢼', '⣸', '⣇', '⡧', '⡗', '⡏'];
@@ -39,10 +36,10 @@ impl Spinner {
 	}
 
 	/// draws or removes spinner char depending on `pending` state
-	pub fn draw(
+	pub fn draw<B: ratatui::backend::Backend>(
 		&self,
-		terminal: &mut Terminal<CrosstermBackend<io::Stdout>>,
-	) -> io::Result<()> {
+		terminal: &mut Terminal<B>,
+	) -> Result<(), B::Error> {
 		let idx = self.idx;
 
 		let char_to_draw =