test(cli): add tests for CLI api group

tests/cli/test_api.py

@@ -0,0 +1,65 @@
+from __future__ import annotations
+
+from unittest import mock
+
+import pytest
+from click.testing import CliRunner
+
+TEST_HOST = "localhost"
+TEST_PORT = 8000
+TEST_WORKERS = 8
+TEST_LOG_LEVEL = "critical"
+TEST_LIMIT_CONCURRENCY = 10000
+
+
+@pytest.mark.parametrize(
+    "host, port, workers, log_level, limit_concurrency",
+    [
+        pytest.param(None, None, None, None, None, id="default conf"),
+        pytest.param(TEST_HOST, TEST_PORT, TEST_WORKERS, None, None, id="common conf"),
+        pytest.param(
+            TEST_HOST, TEST_PORT, TEST_WORKERS, TEST_LOG_LEVEL, TEST_LIMIT_CONCURRENCY, id="override all conf"
+        ),
+    ],
+)
+@mock.patch("uvicorn.run")
+def test_list(mock_uvicorn_run, host, port, workers, log_level, limit_concurrency):
+    from spark_on_k8s.api.configuration import APIConfiguration
+    from spark_on_k8s.cli.api import start
+
+    args = []
+    if host is not None:
+        args.extend(["--host", host])
+        expected_host = host
+    else:
+        expected_host = APIConfiguration.SPARK_ON_K8S_API_HOST
+    if port is not None:
+        args.extend(["--port", port])
+        expected_port = port
+    else:
+        expected_port = APIConfiguration.SPARK_ON_K8S_API_PORT
+    if workers is not None:
+        args.extend(["--workers", workers])
+        expected_workers = workers
+    else:
+        expected_workers = APIConfiguration.SPARK_ON_K8S_API_WORKERS
+    if log_level is not None:
+        args.extend(["--log-level", log_level])
+        expected_log_level = log_level
+    else:
+        expected_log_level = APIConfiguration.SPARK_ON_K8S_API_LOG_LEVEL
+    if limit_concurrency is not None:
+        args.extend(["--limit-concurrency", limit_concurrency])
+        expected_limit_concurrency = limit_concurrency
+    else:
+        expected_limit_concurrency = APIConfiguration.SPARK_ON_K8S_API_LIMIT_CONCURRENCY
+    result = CliRunner().invoke(start, args)
+    assert result.exit_code == 0
+    mock_uvicorn_run.assert_called_with(
+        "spark_on_k8s.api.main:app",
+        host=expected_host,
+        port=expected_port,
+        workers=expected_workers,
+        log_level=expected_log_level,
+        limit_concurrency=expected_limit_concurrency,
+    )