def test_compares_large_files():
# The current buffer used by ``cmp_contents`` is 8192 bytes; make sure
# we can detect differences beyond the end of the first buffer.
common_prefix = b"padding123" * 8200
f1 = io.BytesIO(common_prefix + b"1")
f2 = io.BytesIO(common_prefix + b"2")
assert not filecmp2.cmp_contents(f1=f1, f2=f2)
def test_mixed_binary_and_text_objects_are_different():
f1 = io.BytesIO(b"hello world")
f2 = io.StringIO(u"hello world")
assert not filecmp2.cmp_contents(f1, f2)
def test_can_compare_equal_file_like_objects():
f1 = io.BytesIO(b"hello world")
f2 = io.BytesIO(b"hello world")
assert filecmp2.cmp_contents(f1, f2)
def test_can_compare_equal_file_like_objects_which_are_text():
f1 = io.StringIO(u"hello world")
f2 = io.StringIO(u"hello world")
assert filecmp2.cmp_contents(f1, f2)
def test_comparing_contents_of_file_object_to_itself():
f = io.BytesIO(b"hello world")
with pytest.raises(ValueError, match="f1 and f2 are the same stream"):
filecmp2.cmp_contents(f, f)