gh-93839: Move Lib/unttest/test/ to Lib/test/test_unittest/ (#94043)

* Move Lib/unittest/test/ to Lib/test/test_unittest/
* Remove Lib/test/test_unittest.py
* Replace unittest.test with test.test_unittest
* Remove unittest.load_tests()
* Rewrite unittest __init__.py and __main__.py
* Update build system, CODEOWNERS, and wasm_assets.py

1 files changed, 347 insertions, 0 deletions

diff --git a/Lib/test/test_unittest/testmock/testwith.py b/Lib/test/test_unittest/testmock/testwith.py
new file mode 100644
index 0000000..8dc8eb1
--- /dev/null
+++ b/Lib/test/test_unittest/testmock/testwith.py
@@ -0,0 +1,347 @@
+import unittest
+from warnings import catch_warnings
+
+from test.test_unittest.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') as patch1:
+            with patch.object(c, 'f') 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()