1 files changed, 164 insertions, 0 deletions
diff --git a/crates/shirabe/tests/plugin/e2e_installer_test.rs b/crates/shirabe/tests/plugin/e2e_installer_test.rs
new file mode 100644
index 00000000..dadb5b59
--- /dev/null
+++ b/crates/shirabe/tests/plugin/e2e_installer_test.rs
@@ -0,0 +1,164 @@
+//! Plugin-provided installer E2E compatibility check: upstream Composer and Shirabe each install
+//! a fixture plugin that registers its own `InstallerInterface` through
+//! `InstallationManager::addInstaller`, and the resulting project trees — including the trace the
+//! installer writes on every contract call — are compared.
+//!
+//! The whole fixture is Shirabe-authored (`fixtures/e2e-installer/`), so 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-installer")
+}
+
+struct CommandRun {
+    exit_code: i32,
+    stdout: String,
+}
+
+fn run_command(work: &Path, program: &str, prefix_args: &[&str], args: &[&str]) -> CommandRun {
+    let output = std::process::Command::new(program)
+        .args(prefix_args)
+        .args(args)
+        .current_dir(work.join("project"))
+        .env("COMPOSER_HOME", work.join("home"))
+        .env("COMPOSER_CACHE_DIR", work.join("cache"))
+        .env("COMPOSER_NO_INTERACTION", "1")
+        .env("COLUMNS", "120")
+        .env("LINES", "30")
+        .output()
+        .unwrap();
+    CommandRun {
+        exit_code: output.status.code().unwrap_or(-1),
+        stdout: String::from_utf8_lossy(&output.stdout).into_owned(),
+    }
+}
+
+/// Every file under `dir` as (relative path, contents), so two project trees compare as a whole.
+fn tree(dir: &Path) -> Vec<(String, String)> {
+    let mut files = Vec::new();
+    collect(dir, dir, &mut files);
+    files.sort();
+    files
+}
+
+fn collect(root: &Path, dir: &Path, files: &mut Vec<(String, String)>) {
+    for entry in std::fs::read_dir(dir).unwrap() {
+        let entry = entry.unwrap();
+        let path = entry.path();
+        if entry.file_type().unwrap().is_dir() {
+            collect(root, &path, files);
+        } else {
+            let relative = path
+                .strip_prefix(root)
+                .unwrap()
+                .to_str()
+                .unwrap()
+                .to_string();
+            files.push((relative, std::fs::read_to_string(&path).unwrap_or_default()));
+        }
+    }
+}
+
+fn installer_lines(stdout: &str) -> Vec<&str> {
+    stdout
+        .lines()
+        .filter(|line| line.starts_with("asset-installer:"))
+        .collect()
+}
+
+/// Runs `install` in a fresh copy of the fixture and returns the run plus the resulting tree.
+fn install(program: &str, prefix: &[&str]) -> (CommandRun, Vec<(String, String)>, TempDir) {
+    let work = TempDir::new().unwrap();
+    copy_dir(&fixture_dir(), work.path());
+    let run = run_command(work.path(), program, prefix, &["install"]);
+    let tree = tree(&work.path().join("project"));
+    (run, tree, work)
+}
+
+#[test]
+fn test_plugin_provided_installer_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, upstream_tree, _upstream_work) = install("php", &[composer_bin.as_str()]);
+    let (shirabe, shirabe_tree, _shirabe_work) = 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!(
+        installer_lines(&upstream.stdout),
+        installer_lines(&shirabe.stdout)
+    );
+    assert_eq!(
+        vec!["asset-installer: installed shirabe-test/asset-a"],
+        installer_lines(&shirabe.stdout)
+    );
+
+    // The whole project tree, which covers composer.lock, installed.json/installed.php, the
+    // manifest the plugin-provided installer wrote under assets/, and installer-trace.txt — the
+    // ordered log of every InstallerInterface call the installer received.
+    assert_eq!(
+        upstream_tree.iter().map(|(p, _)| p).collect::<Vec<_>>(),
+        shirabe_tree.iter().map(|(p, _)| p).collect::<Vec<_>>()
+    );
+    assert_eq!(upstream_tree, shirabe_tree);
+}
+
+// Re-running `install` over an already installed project, and removing the asset package
+// afterwards, produce the same files on both sides but consult the installers in a different
+// order: upstream resolves `getInstaller('composer-plugin')` before the asset operations run,
+// Shirabe only when the autoload dump asks for the install paths. The counts differ too once a
+// `remove` re-creates the Composer instance.
+#[ignore = "InstallationManager consults getInstaller at different points than upstream; installer-trace.txt diverges in order and count (TODO(plugin))"]
+#[test]
+fn test_plugin_provided_installer_call_order_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 implementations: [(&str, Vec<&str>); 2] = [
+        ("php", vec![composer_bin.as_str()]),
+        (env!("CARGO_BIN_EXE_shirabe"), vec![]),
+    ];
+
+    let mut results = Vec::new();
+    for (program, prefix) in &implementations {
+        let work = TempDir::new().unwrap();
+        copy_dir(&fixture_dir(), work.path());
+        let first = run_command(work.path(), program, prefix, &["install"]);
+        let second = run_command(work.path(), program, prefix, &["install"]);
+        let remove = run_command(
+            work.path(),
+            program,
+            prefix,
+            &["remove", "shirabe-test/asset-a"],
+        );
+        let tree = tree(&work.path().join("project"));
+        results.push((first, second, remove, tree));
+    }
+
+    let [upstream, shirabe] = <[_; 2]>::try_from(results).ok().unwrap();
+    let (u_first, u_second, u_remove, u_tree) = upstream;
+    let (s_first, s_second, s_remove, s_tree) = shirabe;
+
+    assert_eq!(0, u_first.exit_code);
+    assert_eq!(u_first.exit_code, s_first.exit_code);
+    assert_eq!(u_second.exit_code, s_second.exit_code);
+    assert_eq!(u_remove.exit_code, s_remove.exit_code);
+    assert_eq!(u_tree, s_tree);
+}