tda = dict(a=1)
tra = dict()


def testfail():
    tda['a'] = 1
    tra['b'] = 2
    raise AssertionError('test fails')


def testpass():
    tda['a'] = 11
    tra['b'] = 12
    assert True


def testerror():
    tda['a'] = 99
    tra['b'] = 99
    raise ValueError('this test has an error')
