如何在python中生成动态(参数化)单元测试?
发布于 2021-02-02 23:17:44
我有某种测试数据,并且想要为每个项目创建一个单元测试。我的第一个想法是这样做:
import unittest
l = [["foo", "a", "a",], ["bar", "a", "b"], ["lee", "b", "b"]]
class TestSequence(unittest.TestCase):
def testsample(self):
for name, a,b in l:
print "test", name
self.assertEqual(a,b)
if __name__ == '__main__':
unittest.main()
这样做的缺点是它可以在一次测试中处理所有数据。我想即时为每个项目生成一个测试。有什么建议么?
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1 个回答
-
我用这样的东西:
import unittest l = [["foo", "a", "a",], ["bar", "a", "b"], ["lee", "b", "b"]] class TestSequense(unittest.TestCase): pass def test_generator(a, b): def test(self): self.assertEqual(a,b) return test if __name__ == '__main__': for t in l: test_name = 'test_%s' % t[0] test = test_generator(t[1], t[2]) setattr(TestSequense, test_name, test) unittest.main()
该
parameterized
软件包可用于自动执行此过程:from parameterized import parameterized class TestSequence(unittest.TestCase): @parameterized.expand([ ["foo", "a", "a",], ["bar", "a", "b"], ["lee", "b", "b"], ]) def test_sequence(self, name, a, b): self.assertEqual(a,b)
将会生成测试:
test_sequence_0_foo (__main__.TestSequence) ... ok test_sequence_1_bar (__main__.TestSequence) ... FAIL test_sequence_2_lee (__main__.TestSequence) ... ok ====================================================================== FAIL: test_sequence_1_bar (__main__.TestSequence) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/local/lib/python2.7/site-packages/parameterized/parameterized.py", line 233, in <lambda> standalone_func = lambda *a: func(*(a + p.args), **p.kwargs) File "x.py", line 12, in test_sequence self.assertEqual(a,b) AssertionError: 'a' != 'b'