348 lines
12 KiB
Python
348 lines
12 KiB
Python
import unittest
|
|
from warnings import catch_warnings
|
|
|
|
from unittest.test.testmock.support import is_instance
|
|
from unittest.mock import MagicMock, Mock, patch, sentinel, mock_open, call
|
|
|
|
|
|
|
|
something = sentinel.Something
|
|
something_else = sentinel.SomethingElse
|
|
|
|
|
|
class SampleException(Exception): pass
|
|
|
|
|
|
class WithTest(unittest.TestCase):
|
|
|
|
def test_with_statement(self):
|
|
with patch('%s.something' % __name__, sentinel.Something2):
|
|
self.assertEqual(something, sentinel.Something2, "unpatched")
|
|
self.assertEqual(something, sentinel.Something)
|
|
|
|
|
|
def test_with_statement_exception(self):
|
|
with self.assertRaises(SampleException):
|
|
with patch('%s.something' % __name__, sentinel.Something2):
|
|
self.assertEqual(something, sentinel.Something2, "unpatched")
|
|
raise SampleException()
|
|
self.assertEqual(something, sentinel.Something)
|
|
|
|
|
|
def test_with_statement_as(self):
|
|
with patch('%s.something' % __name__) as mock_something:
|
|
self.assertEqual(something, mock_something, "unpatched")
|
|
self.assertTrue(is_instance(mock_something, MagicMock),
|
|
"patching wrong type")
|
|
self.assertEqual(something, sentinel.Something)
|
|
|
|
|
|
def test_patch_object_with_statement(self):
|
|
class Foo(object):
|
|
something = 'foo'
|
|
original = Foo.something
|
|
with patch.object(Foo, 'something'):
|
|
self.assertNotEqual(Foo.something, original, "unpatched")
|
|
self.assertEqual(Foo.something, original)
|
|
|
|
|
|
def test_with_statement_nested(self):
|
|
with catch_warnings(record=True):
|
|
with patch('%s.something' % __name__) as mock_something, patch('%s.something_else' % __name__) as mock_something_else:
|
|
self.assertEqual(something, mock_something, "unpatched")
|
|
self.assertEqual(something_else, mock_something_else,
|
|
"unpatched")
|
|
|
|
self.assertEqual(something, sentinel.Something)
|
|
self.assertEqual(something_else, sentinel.SomethingElse)
|
|
|
|
|
|
def test_with_statement_specified(self):
|
|
with patch('%s.something' % __name__, sentinel.Patched) as mock_something:
|
|
self.assertEqual(something, mock_something, "unpatched")
|
|
self.assertEqual(mock_something, sentinel.Patched, "wrong patch")
|
|
self.assertEqual(something, sentinel.Something)
|
|
|
|
|
|
def testContextManagerMocking(self):
|
|
mock = Mock()
|
|
mock.__enter__ = Mock()
|
|
mock.__exit__ = Mock()
|
|
mock.__exit__.return_value = False
|
|
|
|
with mock as m:
|
|
self.assertEqual(m, mock.__enter__.return_value)
|
|
mock.__enter__.assert_called_with()
|
|
mock.__exit__.assert_called_with(None, None, None)
|
|
|
|
|
|
def test_context_manager_with_magic_mock(self):
|
|
mock = MagicMock()
|
|
|
|
with self.assertRaises(TypeError):
|
|
with mock:
|
|
'foo' + 3
|
|
mock.__enter__.assert_called_with()
|
|
self.assertTrue(mock.__exit__.called)
|
|
|
|
|
|
def test_with_statement_same_attribute(self):
|
|
with patch('%s.something' % __name__, sentinel.Patched) as mock_something:
|
|
self.assertEqual(something, mock_something, "unpatched")
|
|
|
|
with patch('%s.something' % __name__) as mock_again:
|
|
self.assertEqual(something, mock_again, "unpatched")
|
|
|
|
self.assertEqual(something, mock_something,
|
|
"restored with wrong instance")
|
|
|
|
self.assertEqual(something, sentinel.Something, "not restored")
|
|
|
|
|
|
def test_with_statement_imbricated(self):
|
|
with patch('%s.something' % __name__) as mock_something:
|
|
self.assertEqual(something, mock_something, "unpatched")
|
|
|
|
with patch('%s.something_else' % __name__) as mock_something_else:
|
|
self.assertEqual(something_else, mock_something_else,
|
|
"unpatched")
|
|
|
|
self.assertEqual(something, sentinel.Something)
|
|
self.assertEqual(something_else, sentinel.SomethingElse)
|
|
|
|
|
|
def test_dict_context_manager(self):
|
|
foo = {}
|
|
with patch.dict(foo, {'a': 'b'}):
|
|
self.assertEqual(foo, {'a': 'b'})
|
|
self.assertEqual(foo, {})
|
|
|
|
with self.assertRaises(NameError):
|
|
with patch.dict(foo, {'a': 'b'}):
|
|
self.assertEqual(foo, {'a': 'b'})
|
|
raise NameError('Konrad')
|
|
|
|
self.assertEqual(foo, {})
|
|
|
|
def test_double_patch_instance_method(self):
|
|
class C:
|
|
def f(self): pass
|
|
|
|
c = C()
|
|
|
|
with patch.object(c, 'f', autospec=True) as patch1:
|
|
with patch.object(c, 'f', autospec=True) as patch2:
|
|
c.f()
|
|
self.assertEqual(patch2.call_count, 1)
|
|
self.assertEqual(patch1.call_count, 0)
|
|
c.f()
|
|
self.assertEqual(patch1.call_count, 1)
|
|
|
|
|
|
class TestMockOpen(unittest.TestCase):
|
|
|
|
def test_mock_open(self):
|
|
mock = mock_open()
|
|
with patch('%s.open' % __name__, mock, create=True) as patched:
|
|
self.assertIs(patched, mock)
|
|
open('foo')
|
|
|
|
mock.assert_called_once_with('foo')
|
|
|
|
|
|
def test_mock_open_context_manager(self):
|
|
mock = mock_open()
|
|
handle = mock.return_value
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
with open('foo') as f:
|
|
f.read()
|
|
|
|
expected_calls = [call('foo'), call().__enter__(), call().read(),
|
|
call().__exit__(None, None, None)]
|
|
self.assertEqual(mock.mock_calls, expected_calls)
|
|
self.assertIs(f, handle)
|
|
|
|
def test_mock_open_context_manager_multiple_times(self):
|
|
mock = mock_open()
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
with open('foo') as f:
|
|
f.read()
|
|
with open('bar') as f:
|
|
f.read()
|
|
|
|
expected_calls = [
|
|
call('foo'), call().__enter__(), call().read(),
|
|
call().__exit__(None, None, None),
|
|
call('bar'), call().__enter__(), call().read(),
|
|
call().__exit__(None, None, None)]
|
|
self.assertEqual(mock.mock_calls, expected_calls)
|
|
|
|
def test_explicit_mock(self):
|
|
mock = MagicMock()
|
|
mock_open(mock)
|
|
|
|
with patch('%s.open' % __name__, mock, create=True) as patched:
|
|
self.assertIs(patched, mock)
|
|
open('foo')
|
|
|
|
mock.assert_called_once_with('foo')
|
|
|
|
|
|
def test_read_data(self):
|
|
mock = mock_open(read_data='foo')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
result = h.read()
|
|
|
|
self.assertEqual(result, 'foo')
|
|
|
|
|
|
def test_readline_data(self):
|
|
# Check that readline will return all the lines from the fake file
|
|
# And that once fully consumed, readline will return an empty string.
|
|
mock = mock_open(read_data='foo\nbar\nbaz\n')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
line1 = h.readline()
|
|
line2 = h.readline()
|
|
line3 = h.readline()
|
|
self.assertEqual(line1, 'foo\n')
|
|
self.assertEqual(line2, 'bar\n')
|
|
self.assertEqual(line3, 'baz\n')
|
|
self.assertEqual(h.readline(), '')
|
|
|
|
# Check that we properly emulate a file that doesn't end in a newline
|
|
mock = mock_open(read_data='foo')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
result = h.readline()
|
|
self.assertEqual(result, 'foo')
|
|
self.assertEqual(h.readline(), '')
|
|
|
|
|
|
def test_dunder_iter_data(self):
|
|
# Check that dunder_iter will return all the lines from the fake file.
|
|
mock = mock_open(read_data='foo\nbar\nbaz\n')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
lines = [l for l in h]
|
|
self.assertEqual(lines[0], 'foo\n')
|
|
self.assertEqual(lines[1], 'bar\n')
|
|
self.assertEqual(lines[2], 'baz\n')
|
|
self.assertEqual(h.readline(), '')
|
|
with self.assertRaises(StopIteration):
|
|
next(h)
|
|
|
|
def test_next_data(self):
|
|
# Check that next will correctly return the next available
|
|
# line and plays well with the dunder_iter part.
|
|
mock = mock_open(read_data='foo\nbar\nbaz\n')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
line1 = next(h)
|
|
line2 = next(h)
|
|
lines = [l for l in h]
|
|
self.assertEqual(line1, 'foo\n')
|
|
self.assertEqual(line2, 'bar\n')
|
|
self.assertEqual(lines[0], 'baz\n')
|
|
self.assertEqual(h.readline(), '')
|
|
|
|
def test_readlines_data(self):
|
|
# Test that emulating a file that ends in a newline character works
|
|
mock = mock_open(read_data='foo\nbar\nbaz\n')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
result = h.readlines()
|
|
self.assertEqual(result, ['foo\n', 'bar\n', 'baz\n'])
|
|
|
|
# Test that files without a final newline will also be correctly
|
|
# emulated
|
|
mock = mock_open(read_data='foo\nbar\nbaz')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
result = h.readlines()
|
|
|
|
self.assertEqual(result, ['foo\n', 'bar\n', 'baz'])
|
|
|
|
|
|
def test_read_bytes(self):
|
|
mock = mock_open(read_data=b'\xc6')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
with open('abc', 'rb') as f:
|
|
result = f.read()
|
|
self.assertEqual(result, b'\xc6')
|
|
|
|
|
|
def test_readline_bytes(self):
|
|
m = mock_open(read_data=b'abc\ndef\nghi\n')
|
|
with patch('%s.open' % __name__, m, create=True):
|
|
with open('abc', 'rb') as f:
|
|
line1 = f.readline()
|
|
line2 = f.readline()
|
|
line3 = f.readline()
|
|
self.assertEqual(line1, b'abc\n')
|
|
self.assertEqual(line2, b'def\n')
|
|
self.assertEqual(line3, b'ghi\n')
|
|
|
|
|
|
def test_readlines_bytes(self):
|
|
m = mock_open(read_data=b'abc\ndef\nghi\n')
|
|
with patch('%s.open' % __name__, m, create=True):
|
|
with open('abc', 'rb') as f:
|
|
result = f.readlines()
|
|
self.assertEqual(result, [b'abc\n', b'def\n', b'ghi\n'])
|
|
|
|
|
|
def test_mock_open_read_with_argument(self):
|
|
# At one point calling read with an argument was broken
|
|
# for mocks returned by mock_open
|
|
some_data = 'foo\nbar\nbaz'
|
|
mock = mock_open(read_data=some_data)
|
|
self.assertEqual(mock().read(10), some_data[:10])
|
|
self.assertEqual(mock().read(10), some_data[:10])
|
|
|
|
f = mock()
|
|
self.assertEqual(f.read(10), some_data[:10])
|
|
self.assertEqual(f.read(10), some_data[10:])
|
|
|
|
|
|
def test_interleaved_reads(self):
|
|
# Test that calling read, readline, and readlines pulls data
|
|
# sequentially from the data we preload with
|
|
mock = mock_open(read_data='foo\nbar\nbaz\n')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
line1 = h.readline()
|
|
rest = h.readlines()
|
|
self.assertEqual(line1, 'foo\n')
|
|
self.assertEqual(rest, ['bar\n', 'baz\n'])
|
|
|
|
mock = mock_open(read_data='foo\nbar\nbaz\n')
|
|
with patch('%s.open' % __name__, mock, create=True):
|
|
h = open('bar')
|
|
line1 = h.readline()
|
|
rest = h.read()
|
|
self.assertEqual(line1, 'foo\n')
|
|
self.assertEqual(rest, 'bar\nbaz\n')
|
|
|
|
|
|
def test_overriding_return_values(self):
|
|
mock = mock_open(read_data='foo')
|
|
handle = mock()
|
|
|
|
handle.read.return_value = 'bar'
|
|
handle.readline.return_value = 'bar'
|
|
handle.readlines.return_value = ['bar']
|
|
|
|
self.assertEqual(handle.read(), 'bar')
|
|
self.assertEqual(handle.readline(), 'bar')
|
|
self.assertEqual(handle.readlines(), ['bar'])
|
|
|
|
# call repeatedly to check that a StopIteration is not propagated
|
|
self.assertEqual(handle.readline(), 'bar')
|
|
self.assertEqual(handle.readline(), 'bar')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|