Add some tests (#8)

setup.cfg

@@ -0,0 +1,4 @@
+[tool:pytest]
+addopts = --isort --codestyle
+norecursedirs = build dist *.egg-info .git
+codestyle_max_line_length = 127

test_pytest_docstyle.py

@@ -0,0 +1,102 @@
+import pytest_docstyle
+
+# https://docs.pytest.org/en/latest/writing_plugins.html#testing-plugins
+pytest_plugins = ["pytester"]
+
+
+def test_option_false(testdir):
+    p = testdir.makepyfile("""
+        def test_option(request):
+            flag = request.config.getoption('docstyle')
+            assert flag is False
+    """)
+    p = p.write(p.read() + "\n")
+    result = testdir.runpytest()
+    result.assert_outcomes(passed=1)
+
+
+def test_option_true(testdir):
+    p = testdir.makepyfile("""
+        def test_option(request):
+            flag = request.config.getoption('docstyle')
+            assert flag is True
+    """)
+    p = p.write(p.read() + "\n")
+    result = testdir.runpytest('--docstyle')
+    result.assert_outcomes(passed=1)
+
+
+def test_ini(testdir):
+    testdir.makeini("""
+        [pytest]
+        docstyle_convention = numpy
+        docstyle_add_select = a b c
+        docstyle_add_ignore = d e f
+        docstyle_match = test_re
+    """)
+    p = testdir.makepyfile("""
+        def test_ini(request):
+            config = request.config
+            select = ['a', 'b', 'c']
+            assert config.getini('docstyle_add_select') == select
+            ignore = ['d', 'e', 'f']
+            assert config.getini('docstyle_add_ignore') == ignore
+            match = 'test_re'
+            assert config.getini('docstyle_match') == match
+    """)
+    p = p.write(p.read() + "\n")
+    result = testdir.runpytest('--docstyle')
+    result.assert_outcomes(passed=1)
+
+
+def test_pytest_collect_file(testdir):
+    testdir.tmpdir.ensure('a.py')
+    testdir.tmpdir.ensure('b.py')
+    testdir.tmpdir.ensure('c.txt')
+    testdir.tmpdir.ensure('test_d.py')
+    result = testdir.runpytest('--docstyle')
+    result.assert_outcomes(failed=2)
+
+
+def test_cache(testdir):
+    # D100: Missing docstring in public module
+    testdir.tmpdir.ensure('a.py')
+    p = testdir.makepyfile(b='''\
+        """Test."""
+        def hello():
+            """Print hello."""
+            print('hello')
+    ''')
+    # first run
+    result = testdir.runpytest('--docstyle')
+    result.assert_outcomes(passed=1, failed=1)
+    # second run
+    result = testdir.runpytest('--docstyle')
+    result.assert_outcomes(skipped=1, failed=1)
+
+
+class TestItem(object):
+
+    def test_cache_key(self):
+        assert pytest_docstyle.Item.CACHE_KEY == 'docstyle/mtimes'
+
+    def test_init(self):
+        pass
+
+    def test_setup(self):
+        pass
+
+    def test_runtest(self):
+        pass
+
+    def test_repr_failure(self):
+        pass
+
+    def test_reportinfo(self):
+        pass
+
+
+class TestDocStyleError(object):
+
+    def test_subclass(self):
+        assert issubclass(pytest_docstyle.DocStyleError, Exception)