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test.py
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test.py
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# coding=utf-8
import inspect
import sys
import mock
from functools import wraps
from unittest import TestCase
try:
from nose.tools import assert_equal, assert_raises
except ImportError:
def assert_equal(*args, **kwds):
return TestCase().assertEqual(*args, **kwds)
def assert_raises(*args, **kwds):
return TestCase().assertRaises(*args, **kwds)
from .parameterized import (
PY3, PY2, parameterized, param, parameterized_argument_value_pairs,
short_repr, detect_runner, parameterized_class, SkipTest,
)
def assert_contains(haystack, needle):
if needle not in haystack:
raise AssertionError("%r not in %r" %(needle, haystack))
def assert_raises_regexp_decorator(expected_exception, expected_regexp):
"""
Assert that a wrapped `unittest.TestCase` method raises an error matching the given type and message regex.
:param expected_exception: Exception class expected to be raised.
:param expected_regexp: Regexp (re pattern object or string) expected to be found in error message.
"""
def func_decorator(func):
@wraps(func)
def wrapper(self, *args, **kwargs):
with self.assertRaisesRegexp(expected_exception, expected_regexp):
func(self, *args, **kwargs)
return wrapper
return func_decorator
runner = detect_runner()
UNITTEST = runner.startswith("unittest")
NOSE2 = (runner == "nose2")
PYTEST = (runner == "pytest")
SKIP_FLAGS = {
"generator": UNITTEST,
"standalone": UNITTEST,
# nose2 doesn't run tests on old-style classes under Py2, so don't expect
# these tests to run under nose2.
"py2nose2": (PY2 and NOSE2),
"pytest": PYTEST,
}
missing_tests = set()
def expect(skip, tests=None):
if tests is None:
tests = skip
skip = None
if any(SKIP_FLAGS.get(f) for f in (skip or "").split()):
return
missing_tests.update(tests)
def expect_exception_matching_regex(tests, expected_exception, expected_regexp):
"""
Assert that the given `unittest.TestCase` tests raise an error matching the given type and message regex.
:param tests: A single test name or list of test names.
:param expected_exception: Exception class expected to be raised.
:param expected_regexp: Regexp (re pattern object or string) expected to be found in error message.
"""
if not isinstance(tests, list):
tests = [tests]
decorator = assert_raises_regexp_decorator(expected_exception, expected_regexp)
frame_locals = inspect.currentframe().f_back.f_locals
for test in tests:
if test in frame_locals:
test_method = frame_locals[test]
decorated_test_method = decorator(test_method)
frame_locals[test] = decorated_test_method
test_params = [
(42, ),
"foo0",
b"bar",
123,
param("foo1"),
param("foo2", bar=42),
]
expect("standalone", [
"test_naked_function(42, bar=None)",
"test_naked_function('foo0', bar=None)",
"test_naked_function(b'bar', bar=None)",
"test_naked_function(123, bar=None)",
"test_naked_function('foo1', bar=None)",
"test_naked_function('foo2', bar=42)",
])
@parameterized(test_params)
def test_naked_function(foo, bar=None):
missing_tests.remove("test_naked_function(%r, bar=%r)" %(foo, bar))
class TestParameterized(object):
expect("generator", [
"test_instance_method(42, bar=None)",
"test_instance_method(b'bar', bar=None)",
"test_instance_method(123, bar=None)",
"test_instance_method('foo0', bar=None)",
"test_instance_method('foo1', bar=None)",
"test_instance_method('foo2', bar=42)",
])
@parameterized(test_params)
def test_instance_method(self, foo, bar=None):
missing_tests.remove("test_instance_method(%r, bar=%r)" %(foo, bar))
if not PYTEST:
# py.test doesn't use xunit-style setup/teardown, so these tests don't apply
class TestSetupTeardown(object):
expect("generator", [
"test_setup(setup 1)",
"teardown_called(teardown 1)",
"test_setup(setup 2)",
"teardown_called(teardown 2)",
])
stack = ["setup 1", "teardown 1", "setup 2", "teardown 2"]
actual_order = "error: setup not called"
def setUp(self):
self.actual_order = self.stack.pop(0)
def tearDown(self):
missing_tests.remove("teardown_called(%s)" %(self.stack.pop(0), ))
@parameterized([(1, ), (2, )])
def test_setup(self, count, *a):
assert_equal(self.actual_order, "setup %s" %(count, ))
missing_tests.remove("test_setup(%s)" %(self.actual_order, ))
def custom_naming_func(custom_tag):
def custom_naming_func(testcase_func, param_num, param):
arg = param.args[0]
return testcase_func.__name__ + ('_%s_name_' % custom_tag) + parameterized.to_safe_name(arg)
return custom_naming_func
@mock.patch("os.getpid")
class TestParameterizedExpandWithMockPatchForClass(TestCase):
expect([
"test_one_function_patch_decorator('foo1', 'umask', 'getpid')",
"test_one_function_patch_decorator('foo0', 'umask', 'getpid')",
"test_one_function_patch_decorator(42, 'umask', 'getpid')",
])
@parameterized.expand([(42, ), "foo0", param("foo1")])
@mock.patch("os.umask")
def test_one_function_patch_decorator(self, foo, mock_umask, mock_getpid):
missing_tests.remove("test_one_function_patch_decorator(%r, %r, %r)" %
(foo, mock_umask._mock_name,
mock_getpid._mock_name))
expect([
"test_multiple_function_patch_decorator"
"(42, 51, 'umask', 'fdopen', 'getpid')",
"test_multiple_function_patch_decorator"
"('foo0', 'bar0', 'umask', 'fdopen', 'getpid')",
"test_multiple_function_patch_decorator"
"('foo1', 'bar1', 'umask', 'fdopen', 'getpid')",
])
@parameterized.expand([(42, 51), ("foo0", "bar0"), param("foo1", "bar1")])
@mock.patch("os.fdopen")
@mock.patch("os.umask")
def test_multiple_function_patch_decorator(self, foo, bar, mock_umask,
mock_fdopen, mock_getpid):
missing_tests.remove("test_multiple_function_patch_decorator"
"(%r, %r, %r, %r, %r)" %
(foo, bar, mock_umask._mock_name,
mock_fdopen._mock_name, mock_getpid._mock_name))
@mock.patch("os.getpid")
class TestParameterizedExpandWithNoExpand(object):
expect("generator", [
"test_patch_class_no_expand(42, 51, 'umask', 'getpid')",
])
@parameterized([(42, 51)])
@mock.patch("os.umask")
def test_patch_class_no_expand(self, foo, bar, mock_umask, mock_getpid):
missing_tests.remove("test_patch_class_no_expand"
"(%r, %r, %r, %r)" %
(foo, bar, mock_umask._mock_name,
mock_getpid._mock_name))
class TestParameterizedExpandWithNoMockPatchForClass(TestCase):
expect([
"test_one_function_patch_decorator('foo1', 'umask')",
"test_one_function_patch_decorator('foo0', 'umask')",
"test_one_function_patch_decorator(42, 'umask')",
])
@parameterized.expand([(42, ), "foo0", param("foo1")])
@mock.patch("os.umask")
def test_one_function_patch_decorator(self, foo, mock_umask):
missing_tests.remove("test_one_function_patch_decorator(%r, %r)" %
(foo, mock_umask._mock_name))
expect([
"test_multiple_function_patch_decorator(42, 51, 'umask', 'fdopen')",
"test_multiple_function_patch_decorator('foo0', 'bar0', 'umask', 'fdopen')",
"test_multiple_function_patch_decorator('foo1', 'bar1', 'umask', 'fdopen')",
])
@parameterized.expand([(42, 51), ("foo0", "bar0"), param("foo1", "bar1")])
@mock.patch("os.fdopen")
@mock.patch("os.umask")
def test_multiple_function_patch_decorator(self, foo, bar, mock_umask,
mock_fdopen):
missing_tests.remove("test_multiple_function_patch_decorator"
"(%r, %r, %r, %r)" %
(foo, bar, mock_umask._mock_name,
mock_fdopen._mock_name))
expect([
"test_patch_decorator_over_test_with_error('foo_this', 'umask')",
"test_patch_decorator_over_test_with_error('foo_that', 'umask')",
])
@parameterized.expand([
("foo_this",),
("foo_that",),
])
@mock.patch("os.umask")
def test_patch_decorator_over_test_with_error(self, foo, mock_umask):
missing_tests.remove(
"test_patch_decorator_over_test_with_error({!r}, {!r})".format(foo, mock_umask._mock_name)
)
raise ValueError("This error should have been caught")
expect_exception_matching_regex(
tests=[
"test_patch_decorator_over_test_with_error_0_foo_this",
"test_patch_decorator_over_test_with_error_1_foo_that",
],
expected_exception=ValueError,
expected_regexp="^This error should have been caught$",
)
class TestParameterizedExpandWithNoMockPatchForClassNoExpand(object):
expect("generator", [
"test_patch_no_expand(42, 51, 'umask')",
])
@parameterized([(42, 51)])
@mock.patch("os.umask")
def test_patch_no_expand(self, foo, bar, mock_umask):
missing_tests.remove("test_patch_no_expand(%r, %r, %r)" %
(foo, bar, mock_umask._mock_name))
expect("standalone", [
"test_mock_patch_standalone_function(42, 'umask')",
])
@parameterized([(42, )])
@mock.patch("os.umask")
def test_mock_patch_standalone_function(foo, mock_umask):
missing_tests.remove(
"test_mock_patch_standalone_function(%r, %r)" %(
foo, mock_umask._mock_name
)
)
@mock.patch.multiple("os", umask=mock.DEFAULT)
class TestParameterizedExpandWithMockPatchMultiple(TestCase):
expect([
"test_mock_patch_multiple_expand_on_method(42, 'umask', 'getpid')",
"test_mock_patch_multiple_expand_on_class(16, 'umask')",
])
@parameterized.expand([(42, )])
@mock.patch.multiple("os", getpid=mock.DEFAULT)
def test_mock_patch_multiple_expand_on_method(self, param, umask, getpid):
missing_tests.remove(
"test_mock_patch_multiple_expand_on_method(%r, %r, %r)" %(
param, umask._mock_name, getpid._mock_name
)
)
@parameterized.expand([(16, )])
def test_mock_patch_multiple_expand_on_class(self, param, umask):
missing_tests.remove(
"test_mock_patch_multiple_expand_on_class(%r, %r)" %(
param, umask._mock_name,
)
)
expect("standalone", [
"test_mock_patch_multiple_standalone(42, 'umask', 'getpid')",
])
@parameterized([(42, )])
@mock.patch.multiple("os", umask=mock.DEFAULT, getpid=mock.DEFAULT)
def test_mock_patch_multiple_standalone(param, umask, getpid):
missing_tests.remove(
"test_mock_patch_multiple_standalone(%r, %r, %r)" %(
param, umask._mock_name, getpid._mock_name
)
)
class TestParamerizedOnTestCase(TestCase):
expect([
"test_on_TestCase(42, bar=None)",
"test_on_TestCase(b'bar', bar=None)",
"test_on_TestCase(123, bar=None)",
"test_on_TestCase('foo0', bar=None)",
"test_on_TestCase('foo1', bar=None)",
"test_on_TestCase('foo2', bar=42)",
])
@parameterized.expand(test_params)
def test_on_TestCase(self, foo, bar=None):
missing_tests.remove("test_on_TestCase(%r, bar=%r)" %(foo, bar))
expect([
"test_on_TestCase2_custom_name_42(42, bar=None)",
"test_on_TestCase2_custom_name_b_bar_(b'bar', bar=None)",
"test_on_TestCase2_custom_name_123(123, bar=None)",
"test_on_TestCase2_custom_name_foo0('foo0', bar=None)",
"test_on_TestCase2_custom_name_foo1('foo1', bar=None)",
"test_on_TestCase2_custom_name_foo2('foo2', bar=42)",
])
@parameterized.expand(test_params,
name_func=custom_naming_func("custom"))
def test_on_TestCase2(self, foo, bar=None):
stack = inspect.stack()
frame = stack[1]
frame_locals = frame[0].f_locals
nose_test_method_name = frame_locals['a'][0]._testMethodName
expected_name = "test_on_TestCase2_custom_name_" + parameterized.to_safe_name(foo)
assert_equal(nose_test_method_name, expected_name,
"Test Method name '%s' did not get customized to expected: '%s'" %
(nose_test_method_name, expected_name))
missing_tests.remove("%s(%r, bar=%r)" %(expected_name, foo, bar))
class TestParameterizedExpandDocstring(TestCase):
def _assert_docstring(self, expected_docstring, rstrip=False):
""" Checks the current test method's docstring. Must be called directly
from the test method. """
stack = inspect.stack()
f_locals = stack[3][0].f_locals
test_method = (
f_locals.get("testMethod") or # Py27
f_locals.get("function") or # Py33
f_locals.get("method") or # Py38
f_locals.get("testfunction") or # Py382
None
)
if test_method is None:
raise AssertionError("uh oh, unittest changed a local variable name")
actual_docstring = test_method.__doc__
if rstrip:
actual_docstring = actual_docstring.rstrip()
assert_equal(actual_docstring, expected_docstring)
@parameterized.expand([param("foo")],
doc_func=lambda f, n, p: "stuff")
def test_custom_doc_func(self, foo, bar=None):
"""Documentation"""
self._assert_docstring("stuff")
@parameterized.expand([param("foo")])
def test_single_line_docstring(self, foo):
"""Documentation."""
self._assert_docstring("Documentation [with foo=%r]." %(foo, ))
@parameterized.expand([param("foo")])
def test_empty_docstring(self, foo):
""
self._assert_docstring("[with foo=%r]" %(foo, ))
@parameterized.expand([param("foo")])
def test_multiline_documentation(self, foo):
"""Documentation.
More"""
self._assert_docstring(
"Documentation [with foo=%r].\n\n"
" More" %(foo, )
)
@parameterized.expand([param("foo")])
def test_unicode_docstring(self, foo):
u"""Döcumentation."""
self._assert_docstring(u"Döcumentation [with foo=%r]." %(foo, ))
@parameterized.expand([param("foo", )])
def test_default_values_get_correct_value(self, foo, bar=12):
"""Documentation"""
self._assert_docstring("Documentation [with foo=%r, bar=%r]" %(foo, bar))
@parameterized.expand([param("foo", )])
def test_with_leading_newline(self, foo, bar=12):
"""
Documentation
"""
self._assert_docstring("Documentation [with foo=%r, bar=%r]" %(foo, bar), rstrip=True)
def test_warns_when_using_parameterized_with_TestCase():
try:
class TestTestCaseWarnsOnBadUseOfParameterized(TestCase):
@parameterized([(42, )])
def test_in_subclass_of_TestCase(self, foo):
pass
except Exception as e:
assert_contains(str(e), "parameterized.expand")
else:
raise AssertionError("Expected exception not raised")
def test_helpful_error_on_empty_iterable_input():
try:
parameterized([])(lambda: None)
except ValueError as e:
assert_contains(str(e), "iterable is empty")
else:
raise AssertionError("Expected exception not raised")
def test_skip_test_on_empty_iterable():
func = parameterized([], skip_on_empty=True)(lambda: None)
assert_raises(SkipTest, func)
def test_helpful_error_on_empty_iterable_input_expand():
try:
class ExpectErrorOnEmptyInput(TestCase):
@parameterized.expand([])
def test_expect_error(self):
pass
except ValueError as e:
assert_contains(str(e), "iterable is empty")
else:
raise AssertionError("Expected exception not raised")
expect("stadalone generator", [
"test_wrapped_iterable_input('foo')",
])
@parameterized(lambda: iter(["foo"]))
def test_wrapped_iterable_input(foo):
missing_tests.remove("test_wrapped_iterable_input(%r)" %(foo, ))
def test_helpful_error_on_non_iterable_input():
try:
parameterized(lambda: 42)(lambda: None)
except Exception as e:
assert_contains(str(e), "is not iterable")
else:
raise AssertionError("Expected exception not raised")
def tearDownModule():
missing = sorted(list(missing_tests))
assert_equal(missing, [])
def test_old_style_classes():
if PY3:
raise SkipTest("Py3 doesn't have old-style classes")
class OldStyleClass:
@parameterized(["foo"])
def parameterized_method(self, param):
pass
try:
list(OldStyleClass().parameterized_method())
except TypeError as e:
assert_contains(str(e), "new-style")
assert_contains(str(e), "parameterized.expand")
assert_contains(str(e), "OldStyleClass")
else:
raise AssertionError("expected TypeError not raised by old-style class")
class TestOldStyleClass:
expect("py2nose2 generator", [
"test_on_old_style_class('foo')",
"test_on_old_style_class('bar')",
])
@parameterized.expand(["foo", "bar"])
def test_old_style_classes(self, param):
missing_tests.remove("test_on_old_style_class(%r)" %(param, ))
@parameterized([
("", param(), []),
("*a, **kw", param(), []),
("*a, **kw", param(1, foo=42), [("*a", (1, )), ("**kw", {"foo": 42})]),
("foo", param(1), [("foo", 1)]),
("foo, *a", param(1), [("foo", 1)]),
("foo, *a", param(1, 9), [("foo", 1), ("*a", (9, ))]),
("foo, *a, **kw", param(1, bar=9), [("foo", 1), ("**kw", {"bar": 9})]),
("x=9", param(), [("x", 9)]),
("x=9", param(1), [("x", 1)]),
("x, y=9, *a, **kw", param(1), [("x", 1), ("y", 9)]),
("x, y=9, *a, **kw", param(1, 2), [("x", 1), ("y", 2)]),
("x, y=9, *a, **kw", param(1, 2, 3), [("x", 1), ("y", 2), ("*a", (3, ))]),
("x, y=9, *a, **kw", param(1, y=2), [("x", 1), ("y", 2)]),
("x, y=9, *a, **kw", param(1, z=2), [("x", 1), ("y", 9), ("**kw", {"z": 2})]),
("x, y=9, *a, **kw", param(1, 2, 3, z=3), [("x", 1), ("y", 2), ("*a", (3, )), ("**kw", {"z": 3})]),
])
def test_parameterized_argument_value_pairs(func_params, p, expected):
helper = eval("lambda %s: None" %(func_params, ))
actual = parameterized_argument_value_pairs(helper, p)
assert_equal(actual, expected)
@parameterized([
("abcd", "'abcd'"),
("123456789", "'12...89'"),
(123456789, "123...789"),
(123456789, "12...89", 4),
])
def test_short_repr(input, expected, n=6):
assert_equal(short_repr(input, n=n), expected)
@parameterized([
("foo", ),
])
def test_with_docstring(input):
""" Docstring! """
pass
cases_over_10 = [(i, i+1) for i in range(11)]
@parameterized(cases_over_10)
def test_cases_over_10(input, expected):
assert_equal(input, expected-1)
@parameterized_class(("a", "b", "c"), [
("foo", 1, 2),
(0, 1, 2),
])
class TestParameterizedClass(TestCase):
expect([
"TestParameterizedClass_0_foo:test_method_a('foo', 1, 2)",
"TestParameterizedClass_0_foo:test_method_b('foo', 1, 2)",
"TestParameterizedClass_0_foo:testCamelCaseMethodC('foo', 1, 2)",
"TestParameterizedClass_1:test_method_a(0, 1, 2)",
"TestParameterizedClass_1:test_method_b(0, 1, 2)",
"TestParameterizedClass_1:testCamelCaseMethodC(0, 1, 2)",
])
def _assertions(self, test_name):
assert hasattr(self, "a")
assert_equal(self.b + self.c, 3)
missing_tests.remove("%s:%s(%r, %r, %r)" %(
self.__class__.__name__,
test_name,
self.a,
self.b,
self.c,
))
def test_method_a(self):
self._assertions("test_method_a")
def test_method_b(self):
self._assertions("test_method_b")
def testCamelCaseMethodC(self):
self._assertions("testCamelCaseMethodC")
@parameterized_class(("a", ), [
(1, ),
(2, ),
], class_name_func=lambda cls, idx, attrs: "%s_custom_func_%s" %(cls.__name__, attrs["a"]))
class TestNamedParameterizedClass(TestCase):
expect([
"TestNamedParameterizedClass_custom_func_1:test_method(1)",
"TestNamedParameterizedClass_custom_func_2:test_method(2)",
])
def test_method(self):
missing_tests.remove("%s:test_method(%r)" %(
self.__class__.__name__,
self.a,
))
@parameterized_class([
{"foo": 42},
{"bar": "some stuff"},
{"bar": "other stuff", "name": "some name", "foo": 12},
])
class TestParameterizedClassDict(TestCase):
expect([
"TestParameterizedClassDict_0:setUp(42, 'empty')",
"TestParameterizedClassDict_0:test_method(42, 'empty')",
"TestParameterizedClassDict_0:tearDown(42, 'empty')",
"TestParameterizedClassDict_1_some_stuff:setUp(0, 'some stuff')",
"TestParameterizedClassDict_1_some_stuff:test_method(0, 'some stuff')",
"TestParameterizedClassDict_1_some_stuff:tearDown(0, 'some stuff')",
"TestParameterizedClassDict_2_some_name:setUp(12, 'other stuff')",
"TestParameterizedClassDict_2_some_name:test_method(12, 'other stuff')",
"TestParameterizedClassDict_2_some_name:tearDown(12, 'other stuff')",
])
foo = 0
bar = 'empty'
def setUp(self):
# Ensure that super() works (issue #73)
super(TestParameterizedClassDict, self).setUp()
missing_tests.remove("%s:setUp(%r, %r)" %(
self.__class__.__name__,
self.foo,
self.bar,
))
def tearDown(self):
# Ensure that super() works (issue #73)
super(TestParameterizedClassDict, self).tearDown()
missing_tests.remove("%s:tearDown(%r, %r)" %(
self.__class__.__name__,
self.foo,
self.bar,
))
def test_method(self):
missing_tests.remove("%s:test_method(%r, %r)" %(
self.__class__.__name__,
self.foo,
self.bar,
))
class TestUnicodeDocstring(object):
@parameterized.expand([
'value1',
'vålüé¡'
])
def test_with_docstring(self, param):
""" Это док-стринг, содержащий не-ascii символы """
pass
if sys.version_info.major == 3 and sys.version_info.minor >= 8:
from unittest import IsolatedAsyncioTestCase
class TestAsyncParameterizedExpandWithNoMockPatchForClass(IsolatedAsyncioTestCase):
expect([
"test_one_async_function('foo1')",
"test_one_async_function('foo0')",
"test_one_async_function(42)",
"test_one_async_function_patch_decorator('foo1', 'umask')",
"test_one_async_function_patch_decorator('foo0', 'umask')",
"test_one_async_function_patch_decorator(42, 'umask')",
])
@parameterized.expand([(42,), "foo0", param("foo1")])
async def test_one_async_function(self, foo):
missing_tests.remove("test_one_async_function(%r)" % (foo, ))
@parameterized.expand([(42,), "foo0", param("foo1")])
@mock.patch("os.umask")
async def test_one_async_function_patch_decorator(self, foo, mock_umask):
missing_tests.remove("test_one_async_function_patch_decorator(%r, %r)" %
(foo, mock_umask._mock_name))