鼻子测试 class 带有用于多项测试的生成器，但只有 class 的一个实例

Question

我正在尝试找到一种方法来使用 nose 运行 class 中的多个测试用例，但我需要这样做，其中 nose 只创建一个 class .此 class 将测试网络，网络设置需要几分钟，因此需要运行通过 class 的一个实例进行所有测试。这是我正在尝试做的一个基本示例：

class TestUmbrella(object):

    def __init__(self):
        log.info('__init__ called')

    def run_A(self):
        log.info('Test A is running')

    def run_B(self):
        log.info('Test B is running')

    def run_C(self):
        log.info('Test C is running')

    def run_test(self):
        for x in (self.run_A, self.run_B, self.run_C):
            yield x

这会产生：

 2015-03-19 12:22:31,330:   INFO:       tests.l3.FooTest2: __init__ called
 2015-03-19 12:22:31,331:   INFO:       tests.l3.FooTest2: __init__ called
 2015-03-19 12:22:31,331:   INFO:       tests.l3.FooTest2: Test A is running
.2015-03-19 12:22:31,331:   INFO:       tests.l3.FooTest2: __init__ called
 2015-03-19 12:22:31,332:   INFO:       tests.l3.FooTest2: Test B is running
.2015-03-19 12:22:31,332:   INFO:       tests.l3.FooTest2: __init__ called
 2015-03-19 12:22:31,332:   INFO:       tests.l3.FooTest2: Test C is running
.
----------------------------------------------------------------------
Ran 3 tests in 0.002s

OK

我想看的是：

 2015-03-19 12:22:31,330:   INFO:       tests.l3.FooTest2: __init__ called
 2015-03-19 12:22:31,331:   INFO:       tests.l3.FooTest2: Test A is running
 2015-03-19 12:22:31,332:   INFO:       tests.l3.FooTest2: Test B is running
 2015-03-19 12:22:31,332:   INFO:       tests.l3.FooTest2: Test C is running

关于如何让鼻子做到这一点有什么想法吗？

Answer 1

两种方式获得你想要的东西：将 unittest.TestCase class 与 setUpClass 一起用于您的 TestUmbrella：

from unittest import TestCase
import logging as log

class TestUmbrella(TestCase):
    @classmethod
    def setUpClass(cls):
        log.info('__init__ called')

    def run_A_test(self):
        log.info('Test A is running')

    def run_B_test(self):
        log.info('Test B is running')

    def run_C_test(self):
        log.info('Test C is running')

请注意，您将无法再即时产生结果，并且必须重命名方法以符合 nose 测试模式。那会给你：

$ nosetests cls_test.py -v
INFO:root:__init__ called
run_A_test (cls_test.TestUmbrella) ... INFO:root:Test A is running
ok
run_B_test (cls_test.TestUmbrella) ... INFO:root:Test B is running
ok
run_C_test (cls_test.TestUmbrella) ... INFO:root:Test C is running
ok

----------------------------------------------------------------------
Ran 3 tests in 0.007s

OK

或者，您可以将设置方法注入 class，但不作为 class 初始化的一部分：

import logging as log

class TestUmbrella(object):
    def my_setup(self):
        log.info('__init__ called')

    def run_A(self):
        log.info('Test A is running')

    def run_B(self):
        log.info('Test B is running')

    def run_C(self):
        log.info('Test C is running')

    def run_test(self):
        self.my_setup()
        for x in (self.run_A, self.run_B, self.run_C):
            yield x

最后，如果您真的无法从构造函数中卸载繁重的逻辑，您可以运行从独立函数中进行测试，如下所示：

def run_test():
    tu = TestUmbrella()
    for x in (tu.run_A, tu.run_B, tu.run_C):
        yield x

鼻子测试 class 带有用于多项测试的生成器，但只有 class 的一个实例

nose test class with generator for multiple tests but only one instance of the class

generator

nose

nosetests