flake8 + mypy + unittest

Author: suaaa7

python_ci/Dockerfile

@@ -0,0 +1,8 @@
+FROM python:3.8-slim
+
+COPY requirements.txt .
+COPY requirements-dev.txt .
+
+RUN pip install --no-cache-dir --upgrade pip setuptools wheel \
+  && pip install --no-cache-dir -r requirements.txt \
+  && pip install --no-cache-dir -r requirements-dev.txt

python_ci/Makefile

@@ -0,0 +1,27 @@
+image = python-ci
+tag = 0.1.0
+curdir := `pwd`
+
+.PHONY: dbuild
+dbuild:
+	docker build -t $(image):$(tag) .
+
+.PHONY: drun
+drun:
+	docker run --rm -it -v $(curdir):/opt -w /opt $(image):$(tag) bash
+
+.PHONY: drmi
+drmi:
+	docker rmi -f $(image):$(tag)
+
+.PHONY: flake8
+flake8:
+	flake8 --config=config/tox.ini src
+
+.PHONY: mypy
+mypy:
+	mypy --config=config/mypy.ini src
+
+.PHONY: test
+test:
+	python3 -m unittest discover --verbose src

python_ci/config/mypy.ini

@@ -0,0 +1,9 @@
+[mypy]
+python_version = 3.8
+disallow_untyped_defs = True
+ignore_missing_imports = True
+warn_redundant_casts = True
+no_implicit_optional = True
+
+[mypy-src.tests.*]
+disallow_untyped_defs = False

python_ci/config/tox.ini

@@ -0,0 +1,4 @@
+[flake8]
+max-line-length = 79
+per-file-ignores =
+    src/tests/*:E501

python_ci/requirements-dev.txt

@@ -0,0 +1,2 @@
+flake8==3.8.3
+mypy==0.782

python_ci/requirements.txt

@@ -0,0 +1 @@
+requests==2.24.0

python_ci/src/__init__.py

@@ -0,0 +1,7 @@
+import requests
+
+
+class Sample:
+    def fetch_json(self, url: str) -> dict:
+        response = requests.get(url)
+        return response.json()

python_ci/src/sample.py

@@ -0,0 +1,46 @@
+from unittest import TestCase, main
+from unittest.mock import MagicMock, call, patch
+
+from src.sample import Sample
+
+
+class TestSample(TestCase):
+    def mocked_requests_get(*args, **kwargs):
+        class MockResponse:
+            def __init__(self, json_data, status_code):
+                self.json_data = json_data
+                self.status_code = status_code
+
+            def json(self):
+                return self.json_data
+
+        if args[0] == 'http://example.com/test.json':
+            return MockResponse({'key1': 'value1'}, 200)
+        elif args[0] == 'http://example.com/another_test.json':
+            return MockResponse({'key2': 'value2'}, 200)
+
+        return MockResponse(None, 404)
+
+    @patch('requests.get', side_effect=mocked_requests_get)
+    def test_fetch_json(self, mock_get: MagicMock):
+        sample = Sample()
+
+        json_data = sample.fetch_json('http://example.com/test.json')
+        self.assertEqual(json_data, {'key1': 'value1'})
+        json_data = sample.fetch_json('http://example.com/another_test.json')
+        self.assertEqual(json_data, {'key2': 'value2'})
+        json_data = sample.fetch_json('http://no_example.com/test.json')
+        self.assertIsNone(json_data)
+
+        self.assertIn(
+            call('http://example.com/test.json'), mock_get.call_args_list
+        )
+        self.assertIn(
+            call('http://example.com/another_test.json'), mock_get.call_args_list
+        )
+
+        self.assertEqual(len(mock_get.call_args_list), 3)
+
+
+if __name__ == '__main__':
+    main()