test(cli): add tests for the CLI

tests/integration/cli/test_cli.py

@@ -0,0 +1,34 @@
+# Copyright 2026 jCloud
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import subprocess
+import sys
+
+def test_cli():
+    result = subprocess.run(
+        [
+            sys.executable,
+            '-m',
+            'jcloud_docsgen',
+            '--help'
+        ],
+        capture_output = True,
+        text = True
+    )
+    stdout = result.stdout.lower()
+    assert \
+        'usage:' in stdout and \
+        'positional arguments' in stdout and \
+        'options' in stdout and \
+        '--help' in stdout