用鼻子进行python单元测试:进行顺序测试

您可以将每个类需要计算一次的测试添加到该类的“设置”中。举个例子:

from nose.tools import *
class Test_mysim():
    def setup(self):
        self.ans = calculate_it_once()

    def test_sync(self):
        ans=calculate_it_sync()
        assert_equal(ans,self.ans)

    def test_async(self):
        ans=calculate_it_async()
        assert_equal(ans,self.ans)

总的来说,我建议 不 做一个测试取决于另一个。进行同步测试,进行异步测试,将它们与预期的正确输出进行比较,而不是相互比较。

比如:

class TestSimulate(TestCase):
    def setup(self):
        self.simpack = SimpackToTest()
        self.initial_state = pickle.load("initial.state")
        self.expected_state = pickle.load("known_good.state")

    def test_simulate(self):
        state = simulate(self.simpack, self.initial_state)
        # assert_equal will require State to implement __eq__ in a meaningful
        # way.  If it doesn't, you'll want to define your own comparison 
        # function.
        self.assert_equal(self.expected_state, state)

    def test_other_simulate(self):
        foo = OtherThing(self.simpack)
        blah = foo.simulate(self.initial_state)
        state = blah.state
        self.assert_equal(self.expected_state, state)