1 files changed, 105 insertions, 0 deletions
diff --git a/crates/shirabe/tests/plugin/e2e_package_event_test.rs b/crates/shirabe/tests/plugin/e2e_package_event_test.rs
new file mode 100644
index 00000000..ef334685
--- /dev/null
+++ b/crates/shirabe/tests/plugin/e2e_package_event_test.rs
@@ -0,0 +1,105 @@
+//! Package event E2E compatibility check: upstream Composer and Shirabe each install a fixture
+//! project whose plugin subscribes to every `PackageEvents` constant and appends what each event
+//! exposes to a trace file. Upstream has no test that dispatches package events through a real
+//! plugin, so the whole fixture is Shirabe-authored (`fixtures/e2e-package-event/`) and nothing
+//! has to be fetched; the test skips only while the PHP runtime or the Composer checkout is
+//! missing.
+
+use crate::e2e_extension_installer_test::{copy_dir, upstream_composer_bin};
+use crate::plugin_installer_test::{lock_php_worker, php_runtime_available};
+use std::path::{Path, PathBuf};
+use tempfile::TempDir;
+
+fn fixture_dir() -> PathBuf {
+    Path::new(env!("CARGO_MANIFEST_DIR")).join("tests/plugin/fixtures/e2e-package-event")
+}
+
+struct Run {
+    exit_code: i32,
+    trace: String,
+    repo_trace: String,
+}
+
+/// Runs `install` in a fresh copy of the fixture and returns the exit code with the traces the
+/// plugin wrote.
+fn install(program: &str, prefix_args: &[&str]) -> Run {
+    let work = TempDir::new().unwrap();
+    copy_dir(&fixture_dir(), work.path());
+    let project = work.path().join("project");
+    let output = std::process::Command::new(program)
+        .args(prefix_args)
+        .arg("install")
+        .current_dir(&project)
+        .env("COMPOSER_HOME", work.path().join("home"))
+        .env("COMPOSER_CACHE_DIR", work.path().join("cache"))
+        .env("COMPOSER_NO_INTERACTION", "1")
+        .env("COLUMNS", "120")
+        .env("LINES", "30")
+        .output()
+        .unwrap();
+    let read = |name: &str| std::fs::read_to_string(project.join(name)).unwrap_or_default();
+    Run {
+        exit_code: output.status.code().unwrap_or(-1),
+        trace: read("package-event-trace.txt"),
+        repo_trace: read("package-event-repo-trace.txt"),
+    }
+}
+
+#[test]
+fn test_package_events_match_upstream_composer() {
+    if !php_runtime_available() {
+        return;
+    }
+    let Some(composer_bin) = upstream_composer_bin() else {
+        return;
+    };
+    let _worker = lock_php_worker();
+    let composer_bin = composer_bin.to_str().unwrap().to_string();
+
+    let upstream = install("php", &[composer_bin.as_str()]);
+    let shirabe = install(env!("CARGO_BIN_EXE_shirabe"), &[]);
+
+    assert_eq!(0, upstream.exit_code, "upstream install must succeed");
+    assert_eq!(upstream.exit_code, shirabe.exit_code);
+    assert_eq!(upstream.trace, shirabe.trace);
+
+    // Pinned as well as compared, so a run where neither side dispatches anything cannot pass.
+    // The plugin is activated by the very batch it observes, hence the first line: its own
+    // post-package-install, deferred until after the batch's operations have run. The two
+    // packages of the next batch report their pre-events before either post-event for the same
+    // reason.
+    assert_eq!(
+        "\
+post-package-install devMode=1 class=Composer\\DependencyResolver\\Operation\\InstallOperation type=install packages=shirabe-test/package-event-recorder operations=3 root=shirabe/e2e-package-event show=Installing <info>shirabe-test/package-event-recorder</info> (<comment>1.0.0</comment>)
+pre-package-install devMode=1 class=Composer\\DependencyResolver\\Operation\\InstallOperation type=install packages=shirabe-test/lib-a operations=3 root=shirabe/e2e-package-event show=Installing <info>shirabe-test/lib-a</info> (<comment>1.0.0</comment>)
+pre-package-install devMode=1 class=Composer\\DependencyResolver\\Operation\\InstallOperation type=install packages=shirabe-test/lib-b operations=3 root=shirabe/e2e-package-event show=Installing <info>shirabe-test/lib-b</info> (<comment>1.0.0</comment>)
+post-package-install devMode=1 class=Composer\\DependencyResolver\\Operation\\InstallOperation type=install packages=shirabe-test/lib-a operations=3 root=shirabe/e2e-package-event show=Installing <info>shirabe-test/lib-a</info> (<comment>1.0.0</comment>)
+post-package-install devMode=1 class=Composer\\DependencyResolver\\Operation\\InstallOperation type=install packages=shirabe-test/lib-b operations=3 root=shirabe/e2e-package-event show=Installing <info>shirabe-test/lib-b</info> (<comment>1.0.0</comment>)
+",
+        upstream.trace
+    );
+}
+
+// Upstream's operation chain starts running where it is built, because a `prepare()` that
+// returns null becomes an already-fulfilled React promise whose `then()` handlers run through
+// the immediately drained queue; the pre-event of the next operation therefore already sees the
+// previous one installed. Shirabe builds a lazy future per operation and only drives them in
+// wait_on_promises, so every pre-event of a batch sees the repository as it was before the
+// batch. Upstream: 1 / 1 / 2 / 3 / 3, Shirabe: 1 / 1 / 1 / 3 / 3.
+#[ignore = "operation chains run where they are built upstream but only in wait_on_promises here, so the repository state a package event observes differs (TODO(phase-c) promise cluster)"]
+#[test]
+fn test_local_repository_seen_by_package_events_matches_upstream_composer() {
+    if !php_runtime_available() {
+        return;
+    }
+    let Some(composer_bin) = upstream_composer_bin() else {
+        return;
+    };
+    let _worker = lock_php_worker();
+    let composer_bin = composer_bin.to_str().unwrap().to_string();
+
+    let upstream = install("php", &[composer_bin.as_str()]);
+    let shirabe = install(env!("CARGO_BIN_EXE_shirabe"), &[]);
+
+    assert_eq!(upstream.repo_trace, shirabe.repo_trace);
+}