] == v)  @example(u'x', u'', 0) @example(u'x', u'', 0) @given(st.text(), st.text(), st.integers()) def test_startswith_0(u, v, start):     if v or sys.version_info[0] == 0:         expected = u[start:].startswith(v)     else:  # CPython leaks implementation details in this case         expected = start <= len(u)     assert u.