1 files changed, 167 insertions, 0 deletions
diff --git a/crates/shirabe/src/lib.rs b/crates/shirabe/src/lib.rs
index 4bd52c2..8d8cc96 100644
--- a/crates/shirabe/src/lib.rs
+++ b/crates/shirabe/src/lib.rs
@@ -44,3 +44,170 @@ pub fn run(argv: Vec<String>) -> anyhow::Result<i32> {
         as std::rc::Rc<std::cell::RefCell<dyn InputInterface>>;
     Application::run(&application, Some(input), None)
 }
+
+#[cfg(test)]
+mod cli_tests {
+    use std::panic::{AssertUnwindSafe, catch_unwind};
+    use std::sync::{Mutex, Once};
+
+    const COMMANDS: &[&str] = &[
+        "about",
+        "archive",
+        "audit",
+        "browse",
+        "bump",
+        "check-platform-reqs",
+        "clear-cache",
+        "config",
+        "create-project",
+        "depends",
+        "diagnose",
+        "dump-autoload",
+        "exec",
+        "fund",
+        "global",
+        "init",
+        "install",
+        "licenses",
+        "outdated",
+        "prohibits",
+        "reinstall",
+        "remove",
+        "repository",
+        "require",
+        "run-script",
+        "search",
+        "self-update",
+        "show",
+        "status",
+        "suggests",
+        "update",
+        "validate",
+    ];
+
+    static QUIET_PANIC: Once = Once::new();
+
+    /// `crate::run` reads/writes process-global env, so concurrent invocations race;
+    /// serialize them since the default test harness runs tests on many threads.
+    static SERIAL: Mutex<()> = Mutex::new(());
+
+    /// Runs the CLI with `args`. Returns true on clean exit, false on any panic / error / non-zero
+    /// exit.
+    fn run(args: &[&str]) -> bool {
+        QUIET_PANIC.call_once(|| std::panic::set_hook(Box::new(|_| {})));
+        let _guard = SERIAL.lock().unwrap_or_else(|e| e.into_inner());
+
+        // Each invocation must look like a fresh process.
+        //
+        // SAFETY: all environment access in these tests happens through `crate::run` while holding
+        // `SERIAL`, so no other thread reads or writes the environment concurrently with these calls.
+        unsafe {
+            std::env::remove_var("COLUMNS");
+            std::env::remove_var("LINES");
+        }
+
+        let mut argv = vec!["composer".to_string()];
+        argv.extend(args.iter().map(|s| s.to_string()));
+        matches!(
+            catch_unwind(AssertUnwindSafe(|| crate::run(argv))),
+            Ok(Ok(0))
+        )
+    }
+
+    #[test]
+    fn version_flag() {
+        assert!(run(&["--version"]));
+    }
+
+    #[test]
+    fn help_flag() {
+        assert!(run(&["--help"]));
+    }
+
+    #[test]
+    fn each_command_help() {
+        let failed: Vec<&&str> = COMMANDS.iter().filter(|c| !run(&[c, "--help"])).collect();
+        assert!(failed.is_empty(), "`<cmd> --help` failed for: {failed:?}");
+    }
+
+    /// Runs the CLI with `args` from inside an empty temporary directory. Returns true if the call did
+    /// not panic (any exit code, including non-zero or an `Err` return, counts as success).
+    fn run_no_panic(args: &[&str]) -> bool {
+        QUIET_PANIC.call_once(|| std::panic::set_hook(Box::new(|_| {})));
+        let _guard = SERIAL.lock().unwrap_or_else(|e| e.into_inner());
+
+        let original = std::env::current_dir().ok();
+        let dir = tempfile::tempdir().expect("create temp dir");
+        std::env::set_current_dir(dir.path()).expect("chdir to temp dir");
+
+        // SAFETY: all environment access here happens while holding `SERIAL`, so no other thread
+        // touches the environment or working directory concurrently.
+        unsafe {
+            std::env::remove_var("COLUMNS");
+            std::env::remove_var("LINES");
+        }
+
+        let mut argv = vec!["composer".to_string()];
+        argv.extend(args.iter().map(|s| s.to_string()));
+        let result = catch_unwind(AssertUnwindSafe(|| crate::run(argv)));
+
+        if let Some(orig) = original {
+            let _ = std::env::set_current_dir(orig);
+        }
+
+        result.is_ok()
+    }
+
+    macro_rules! run_no_panic_tests {
+        ($( $(#[$attr:meta])* $name:ident => $cmd:expr ),* $(,)?) => {
+            $(
+                $(#[$attr])*
+                #[test]
+                fn $name() {
+                    assert!(run_no_panic(&[$cmd]), "`{}` panicked", $cmd);
+                }
+            )*
+        };
+    }
+
+    run_no_panic_tests! {
+        run_about => "about",
+        #[ignore = "currently panics"]
+        run_archive => "archive",
+        run_audit => "audit",
+        #[ignore = "currently panics"]
+        run_browse => "browse",
+        run_bump => "bump",
+        run_check_platform_reqs => "check-platform-reqs",
+        #[ignore = "currently panics"]
+        run_clear_cache => "clear-cache",
+        run_config => "config",
+        run_create_project => "create-project",
+        run_depends => "depends",
+        #[ignore = "currently panics"]
+        run_diagnose => "diagnose",
+        run_dump_autoload => "dump-autoload",
+        run_exec => "exec",
+        run_fund => "fund",
+        run_global => "global",
+        #[ignore = "currently panics"]
+        run_init => "init",
+        run_install => "install",
+        run_licenses => "licenses",
+        run_outdated => "outdated",
+        run_prohibits => "prohibits",
+        run_reinstall => "reinstall",
+        run_remove => "remove",
+        run_repository => "repository",
+        #[ignore = "currently panics"]
+        run_require => "require",
+        run_run_script => "run-script",
+        run_search => "search",
+        run_self_update => "self-update",
+        run_show => "show",
+        run_status => "status",
+        run_suggests => "suggests",
+        run_update => "update",
+        run_validate => "validate",
+    }
+}