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, 40 insertions, 0 deletions

diff --git a/crates/mozart/tests/cli_config.rs b/crates/mozart/tests/cli_config.rs
new file mode 100644
index 0000000..e433653
--- /dev/null
+++ b/crates/mozart/tests/cli_config.rs
@@ -0,0 +1,40 @@
+mod common;
+
+use predicates::str::contains;
+
+#[test]
+fn test_config_list() {
+    let project = common::copy_fixture_to_temp("minimal");
+    common::mozart_cmd()
+        .arg("config")
+        .arg("--list")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .success()
+        .stdout(contains("vendor-dir"));
+}
+
+#[test]
+fn test_config_single_key() {
+    let project = common::copy_fixture_to_temp("minimal");
+    common::mozart_cmd()
+        .arg("config")
+        .arg("vendor-dir")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .success()
+        .stdout(contains("vendor"));
+}
+
+#[test]
+fn test_config_no_key_fails() {
+    let project = common::copy_fixture_to_temp("minimal");
+    common::mozart_cmd()
+        .arg("config")
+        .arg("--working-dir")
+        .arg(project.path())
+        .assert()
+        .failure();
+}