Add simple unit testing

Add pytest framework and a few simple tests that just check the most
basic things.

- tests.test_config: checks that config has sane defaults
- tests.test_sync_request: check that we can render a basic GET request
  for /objects/servers
- test.conftest: fixture for SyncGridscaleApiClient
- pytest.ini: ini file for pytest that just limits test discovery to
  tests/ directory (much faster)
- dev-requirements.txt: contains all dependencies to run the test plus a
  few other Python dev tools for linting, refactoring, and formatting,
  notably pylint, rope, black

You can run the tests with:

    $ python -m venv .venv
    $ source .venv/bin/activate
    $ python -m pip install -r dev-requirements.txt
    $ pytest

Author: bkircher

dev-requirements.txt

@@ -0,0 +1,9 @@
+urllib3>=1.15
+six>=1.10
+certifi
+python-dateutil
+pylint
+rope
+black
+pytest
+pytest-mock

pytest.ini

@@ -0,0 +1,4 @@
+# See https://docs.pytest.org/en/latest/reference.html#configuration-options
+
+[pytest]
+testpaths = tests

tests/__init__.py

@@ -0,0 +1,17 @@
+from typing import Iterator
+
+import pytest
+
+from gs_api_client import SyncGridscaleApiClient, Configuration
+
+
+@pytest.fixture
+def client() -> Iterator[SyncGridscaleApiClient]:
+    """Fixture that creates and configures a synchronous API client."""
+
+    c = Configuration()
+    c.host = "https://example.com"
+    c.api_key["X-Auth-Token"] = "fake-token"
+    c.api_key["X-Auth-UserId"] = "not-a-uuid"
+
+    yield SyncGridscaleApiClient(configuration=c)

tests/conftest.py

@@ -0,0 +1,11 @@
+from gs_api_client import Configuration
+
+
+def test_debug_is_disabled_by_default():
+    config = Configuration()
+    assert not config.debug
+
+
+def test_tls_certs_are_verified_by_default():
+    config = Configuration()
+    assert config.verify_ssl

tests/test_config.py

@@ -0,0 +1,26 @@
+from gs_api_client import Configuration, SyncGridscaleApiClient
+
+
+def test_get_servers(client, mocker):
+    mock_api = mocker.patch.object(client.api_client, "call_api")
+    mock_api.return_value = (mocker.ANY, 200, None)
+
+    client.get_servers()
+
+    mock_api.assert_called_once_with(
+        "/objects/servers",
+        "GET",
+        mocker.ANY,
+        mocker.ANY,
+        mocker.ANY,
+        body=mocker.ANY,
+        post_params=mocker.ANY,
+        files=mocker.ANY,
+        response_type=mocker.ANY,
+        auth_settings=mocker.ANY,
+        async_req=mocker.ANY,
+        _return_http_data_only=mocker.ANY,
+        collection_formats=mocker.ANY,
+        _preload_content=mocker.ANY,
+        _request_timeout=mocker.ANY,
+    )