我有一些测试数据，想为每个项目创建一个单元测试。我的第一个想法是这样做的:
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()
这样做的缺点是它在一个测试中处理所有数据。我想在飞行中为每个项目生成一个测试。有什么建议吗?
当前回答
您可以使用TestSuite和自定义TestCase类。
import unittest
class CustomTest(unittest.TestCase):
def __init__(self, name, a, b):
super().__init__()
self.name = name
self.a = a
self.b = b
def runTest(self):
print("test", self.name)
self.assertEqual(self.a, self.b)
if __name__ == '__main__':
suite = unittest.TestSuite()
suite.addTest(CustomTest("Foo", 1337, 1337))
suite.addTest(CustomTest("Bar", 0xDEAD, 0xC0DE))
unittest.TextTestRunner().run(suite)
其他回答
从Python 3.4开始，已经为此目的向unittest引入了子测试。详细信息请参见文档。TestCase。subTest是一个上下文管理器，它允许在测试中隔离断言，以便用参数信息报告失败，但它不会停止测试执行。下面是文档中的例子:
class NumbersTest(unittest.TestCase):
def test_even(self):
"""
Test that numbers between 0 and 5 are all even.
"""
for i in range(0, 6):
with self.subTest(i=i):
self.assertEqual(i % 2, 0)
测试运行的输出是:
======================================================================
FAIL: test_even (__main__.NumbersTest) (i=1)
----------------------------------------------------------------------
Traceback (most recent call last):
File "subtests.py", line 32, in test_even
self.assertEqual(i % 2, 0)
AssertionError: 1 != 0
======================================================================
FAIL: test_even (__main__.NumbersTest) (i=3)
----------------------------------------------------------------------
Traceback (most recent call last):
File "subtests.py", line 32, in test_even
self.assertEqual(i % 2, 0)
AssertionError: 1 != 0
======================================================================
FAIL: test_even (__main__.NumbersTest) (i=5)
----------------------------------------------------------------------
Traceback (most recent call last):
File "subtests.py", line 32, in test_even
self.assertEqual(i % 2, 0)
AssertionError: 1 != 0
这也是unittest2的一部分，因此可用于早期版本的Python。
load_tests是2.7中引入的一种鲜为人知的机制，用于动态创建TestSuite。有了它，您可以轻松地创建参数化测试。
例如:
import unittest
class GeneralTestCase(unittest.TestCase):
def __init__(self, methodName, param1=None, param2=None):
super(GeneralTestCase, self).__init__(methodName)
self.param1 = param1
self.param2 = param2
def runTest(self):
pass # Test that depends on param 1 and 2.
def load_tests(loader, tests, pattern):
test_cases = unittest.TestSuite()
for p1, p2 in [(1, 2), (3, 4)]:
test_cases.addTest(GeneralTestCase('runTest', p1, p2))
return test_cases
该代码将运行load_tests返回的测试套件中的所有测试用例。发现机制不会自动运行其他测试。
或者，您也可以使用此票据所示的继承:http://bugs.python.org/msg151444
我有麻烦使这些工作为setUpClass。
下面是Javier回答的一个版本，它允许setUpClass访问动态分配的属性。
import unittest
class GeneralTestCase(unittest.TestCase):
@classmethod
def setUpClass(cls):
print ''
print cls.p1
print cls.p2
def runTest1(self):
self.assertTrue((self.p2 - self.p1) == 1)
def runTest2(self):
self.assertFalse((self.p2 - self.p1) == 2)
def load_tests(loader, tests, pattern):
test_cases = unittest.TestSuite()
for p1, p2 in [(1, 2), (3, 4)]:
clsname = 'TestCase_{}_{}'.format(p1, p2)
dct = {
'p1': p1,
'p2': p2,
}
cls = type(clsname, (GeneralTestCase,), dct)
test_cases.addTest(cls('runTest1'))
test_cases.addTest(cls('runTest2'))
return test_cases
输出
1
2
..
3
4
..
----------------------------------------------------------------------
Ran 4 tests in 0.000s
OK
以下是我的解决方案。我发现这个方法很有用:
Should work for unittest.Testcase and unittest discover Have a set of tests to be run for different parameter settings. Very simple and no dependency on other packages import unittest class BaseClass(unittest.TestCase): def setUp(self): self.param = 2 self.base = 2 def test_me(self): self.assertGreaterEqual(5, self.param+self.base) def test_me_too(self): self.assertLessEqual(3, self.param+self.base) class Child_One(BaseClass): def setUp(self): BaseClass.setUp(self) self.param = 4 class Child_Two(BaseClass): def setUp(self): BaseClass.setUp(self) self.param = 1
import unittest
def generator(test_class, a, b):
def test(self):
self.assertEqual(a, b)
return test
def add_test_methods(test_class):
# The first element of list is variable "a", then variable "b", then name of test case that will be used as suffix.
test_list = [[2,3, 'one'], [5,5, 'two'], [0,0, 'three']]
for case in test_list:
test = generator(test_class, case[0], case[1])
setattr(test_class, "test_%s" % case[2], test)
class TestAuto(unittest.TestCase):
def setUp(self):
print 'Setup'
pass
def tearDown(self):
print 'TearDown'
pass
_add_test_methods(TestAuto) # It's better to start with underscore so it is not detected as a test itself
if __name__ == '__main__':
unittest.main(verbosity=1)
结果:
>>>
Setup
FTearDown
Setup
TearDown
.Setup
TearDown
.
======================================================================
FAIL: test_one (__main__.TestAuto)
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:/inchowar/Desktop/PyTrash/test_auto_3.py", line 5, in test
self.assertEqual(a, b)
AssertionError: 2 != 3
----------------------------------------------------------------------
Ran 3 tests in 0.019s
FAILED (failures=1)
