test(cli): add end-to-end integration tests for CLI commands

Add 23 integration tests using assert_cmd and predicates covering
about, validate, show, licenses, install, config, init, and
dump-autoload commands with shared test helpers and fixture projects.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/crates/mozart/tests/cli_install.rs b/crates/mozart/tests/cli_install.rs
new file mode 100644
index 0000000..5312956
--- /dev/null
+++ b/crates/mozart/tests/cli_install.rs
@@ -0,0 +1,52 @@
+mod common;
+
+use predicates::str::contains;
+
+#[test]
+fn test_install_dry_run() {
+    let project = common::copy_fixture_to_temp("with_lock");
+    common::mozart_cmd()
+        .arg("install")
+        .arg("--dry-run")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .success()
+        .stderr(contains("Installing"));
+}
+
+#[test]
+fn test_install_no_lock_file() {
+    let project = common::copy_fixture_to_temp("minimal");
+    common::mozart_cmd()
+        .arg("install")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .failure()
+        .stderr(contains("mozart update"));
+}
+
+#[test]
+fn test_install_no_composer_json() {
+    let project = tempfile::TempDir::new().unwrap();
+    common::mozart_cmd()
+        .arg("install")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .failure();
+}
+
+#[test]
+fn test_install_dry_run_shows_package_names() {
+    let project = common::copy_fixture_to_temp("with_lock");
+    common::mozart_cmd()
+        .arg("install")
+        .arg("--dry-run")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .success()
+        .stderr(contains("psr/log"));
+}