test_binary_diff() fails

I am running tests at my machine and test_binary_diff() fails with following error:

repo = pygit2.Repository('/tmp/pytest/test_binary_diff0/binaryfilerepo/.git/')

    def test_binary_diff(repo):
        diff = repo.diff('HEAD', 'HEAD^')
        assert PATCH_BINARY == diff.patch
        diff = repo.diff('HEAD', 'HEAD^', flags=DiffOption.SHOW_BINARY)
>       assert PATCH_BINARY_SHOW == diff.patch
E       AssertionError: assert 'diff --git a...vrst3ey5{\n\n' == 'diff --git a...vrst3ey5{\n\n'
E         Skipping 154 identical leading characters in diff, use -v to show
E           teral 8
E         - PcwS>j%FIhFs^kIy3n&7R
E         ?   ^^^^
E         + Pc${NM%FIhFs^kIy3n&7R
E         ?   ^^^^
E           ...

首先运行 test_binary_diff()，并将生成的 SHOW_BINARY diff 与 PATCH_BINARY_SHOW 进行比较，重点关注 assertion 中显示的不同二进制内容。跟踪仓库的 diff 调用及其二进制输出行为；当测试生成预期的稳定 patch 输出时，工作即完成。