test(cli): add tests for CLI apps group (#64)

tests/cli/test_apps.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from unittest import mock
+
+from click.testing import CliRunner
+
+TEST_NAMESPACE = "test-namespace"
+
+
+@mock.patch("spark_on_k8s.utils.app_manager.SparkAppManager")
+def test_list(mock_spark_app_manager):
+    from spark_on_k8s.cli.apps import list
+
+    mock_spark_app_manager().list_apps.return_value = ["app1", "app2", "app3"]
+    args = ["--namespace", TEST_NAMESPACE]
+    result = CliRunner().invoke(list, args)
+    assert result.exit_code == 0
+    assert result.output == "app1\napp2\napp3\n"
+    mock_spark_app_manager().list_apps.assert_called_with(namespace=TEST_NAMESPACE)