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, 60 insertions, 0 deletions

diff --git a/crates/mozart/tests/cli_validate.rs b/crates/mozart/tests/cli_validate.rs
new file mode 100644
index 0000000..fe3c080
--- /dev/null
+++ b/crates/mozart/tests/cli_validate.rs
@@ -0,0 +1,60 @@
+mod common;
+
+#[test]
+fn test_validate_valid_project() {
+    let project = common::copy_fixture_to_temp("minimal");
+    common::mozart_cmd()
+        .arg("validate")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .success();
+}
+
+#[test]
+fn test_validate_valid_with_lock() {
+    let project = common::copy_fixture_to_temp("with_lock");
+    common::mozart_cmd()
+        .arg("validate")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .success();
+}
+
+#[test]
+fn test_validate_invalid_json() {
+    let project = common::copy_fixture_to_temp("invalid_json");
+    common::mozart_cmd()
+        .arg("validate")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .code(2);
+}
+
+#[test]
+fn test_validate_missing_composer_json() {
+    let project = tempfile::TempDir::new().unwrap();
+    common::mozart_cmd()
+        .arg("validate")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .failure();
+}
+
+#[test]
+fn test_validate_strict_with_warnings() {
+    // A composer.json without a license generates a warning.
+    // With --strict, warnings become a non-zero exit code.
+    let project =
+        common::setup_temp_project(r#"{"name": "test/no-license", "require": {"php": ">=8.1"}}"#);
+    common::mozart_cmd()
+        .arg("validate")
+        .arg("--strict")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .code(1);
+}