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[3.14] gh-127647: Fix and enable I/O protocol tests (GH-138369) #138376

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[3.14] gh-127647: Fix and enable I/O protocol tests (GH-138369) #138376

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9 changes: 5 additions & 4 deletions Lib/test/test_io.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5014,12 +5014,12 @@ def write(self, b: bytes):
pass

def test_reader_subclass(self):
self.assertIsSubclass(MyReader, io.Reader[bytes])
self.assertNotIsSubclass(str, io.Reader[bytes])
self.assertIsSubclass(self.MyReader, io.Reader)
self.assertNotIsSubclass(str, io.Reader)

def test_writer_subclass(self):
self.assertIsSubclass(MyWriter, io.Writer[bytes])
self.assertNotIsSubclass(str, io.Writer[bytes])
self.assertIsSubclass(self.MyWriter, io.Writer)
self.assertNotIsSubclass(str, io.Writer)


def load_tests(loader, tests, pattern):
Expand All @@ -5033,6 +5033,7 @@ def load_tests(loader, tests, pattern):
CTextIOWrapperTest, PyTextIOWrapperTest,
CMiscIOTest, PyMiscIOTest,
CSignalsTest, PySignalsTest, TestIOCTypes,
ProtocolsTest,
)

# Put the namespaces of the IO module we are testing and some useful mock
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