tools.py 文件源码

def assert_file_contents_equal(a, b):
    '''
    Assert that two files have the same size and hash.
    '''
    def generate_error_message(a, b):
        '''
        This creates the error message for the assertion error
        '''
        size_a = os.stat(a).st_size
        size_b = os.stat(b).st_size
        if size_a == size_b:
            return "Files have the same size but different contents"
        else:
            return "Files have different sizes: a:%d b: %d" % (size_a, size_b)

    assert file_digest(a) == file_digest(b), generate_error_message(a, b)