Add mypy linting

Author: bluetech

pytest_django/asserts.py

@@ -1,7 +1,9 @@
 """
 Dynamically load all Django assertion cases and expose them for importing.
 """
+from typing import Set
 from functools import wraps
+
 from django.test import (
     TestCase, SimpleTestCase,
     LiveServerTestCase, TransactionTestCase
@@ -21,7 +23,7 @@ def assertion_func(*args, **kwargs):
 
 
 __all__ = []
-assertions_names = set()
+assertions_names = set()  # type: Set[str]
 assertions_names.update(
     {attr for attr in vars(TestCase) if attr.startswith('assert')},
     {attr for attr in vars(SimpleTestCase) if attr.startswith('assert')},

pytest_django/fixtures.py

@@ -1,6 +1,5 @@
 """All pytest-django fixtures"""
-
-
+from typing import List, Any
 import os
 from contextlib import contextmanager
 from functools import partial
@@ -356,7 +355,7 @@ def async_rf():
 
 
 class SettingsWrapper:
-    _to_restore = []
+    _to_restore = []  # type: List[Any]
 
     def __delattr__(self, attr):
         from django.test import override_settings

pytest_django_test/app/migrations/0001_initial.py

@@ -1,4 +1,4 @@
-# Generated by Django 1.9a1 on 2016-06-22 04:33
+from typing import List, Tuple
 
 from django.db import migrations, models
 
@@ -7,7 +7,7 @@ class Migration(migrations.Migration):
 
     initial = True
 
-    dependencies = []
+    dependencies = []  # type: List[Tuple[str, str]]
 
     operations = [
         migrations.CreateModel(

setup.cfg

@@ -69,3 +69,20 @@ exclude = lib/,src/,docs/,bin/
 
 [isort]
 forced_separate = tests,pytest_django,pytest_django_test
+
+[mypy]
+disallow_any_generics = True
+no_implicit_optional = True
+show_error_codes = True
+strict_equality = True
+warn_redundant_casts = True
+warn_unreachable = True
+warn_unused_configs = True
+no_implicit_reexport = True
+
+[mypy-django.*]
+ignore_missing_imports = True
+[mypy-configurations.*]
+ignore_missing_imports = True
+[mypy-psycopg2cffi.*]
+ignore_missing_imports = True

tests/test_fixtures.py

@@ -3,11 +3,10 @@
 Not quite all fixtures are tested here, the db and transactional_db
 fixtures are tested in test_database.
 """
-
-
 import socket
 from contextlib import contextmanager
-from urllib.request import urlopen, HTTPError
+from urllib.error import HTTPError
+from urllib.request import urlopen
 
 import pytest
 from django.conf import settings as real_settings

tox.ini

@@ -53,9 +53,11 @@ commands =
 extras =
 deps =
     flake8
+    mypy==0.812
 commands =
     flake8 --version
     flake8 --statistics {posargs:pytest_django pytest_django_test tests}
+    mypy {posargs:pytest_django pytest_django_test tests}
 
 [testenv:doc8]
 extras =