test(command): add basic smoke tests

1 files changed, 82 insertions, 0 deletions

diff --git a/crates/shirabe/tests/cli.rs b/crates/shirabe/tests/cli.rs
new file mode 100644
index 0000000..09b9746
--- /dev/null
+++ b/crates/shirabe/tests/cli.rs
@@ -0,0 +1,82 @@
+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+    "outdated",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();
+
+/// `shirabe::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 `shirabe::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(|| shirabe::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:?}");
+}