使用鼻子测试子过程的值错误

Question

我希望拥有与执行os.system时相同的输出：

os.system('nosetests TestStateMachine.py:FluidityTest.test_it_has_an_initial_state -v')
test_it_has_an_initial_state (TestStateMachine.FluidityTest) ... ok
----------------------------------------------------------------------
Ran 1 test in 0.001s
OK
Out[5]: 0

但是当我执行时：

x = subprocess.Popen(["nosetests",
"TestStateMachine.py:FluidityTest.test_it_has_an_initial_state -v"],
stdout=subprocess.PIPE)

我得到：

E
======================================================================
ERROR: Failure: ValueError (No such test FluidityTest.test_it_has_an_initial_state -v)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/nose/failure.py", line 41, in runTest
raise self.exc_class(self.exc_val)
ValueError: No such test FluidityTest.test_it_has_an_initial_state -v
----------------------------------------------------------------------
Ran 1 test in 0.034s
FAILED (errors=1)

Answer 1

您使用了错误的命令行。这是正确的：

x = subprocess.Popen(["nosetests",
    "TestStateMachine.py:FluidityTest.test_it_has_an_initial_state",
    "-v"],
    stdout=subprocess.PIPE)

传递给Popen的列表已表示已分析的命令行。通过将测试名称和-v放在同一个字符串中，就像你引用它们一样，就像做

：

$nosetests "TestStateMachine.py:FluidityTest.test_it_has_an_initial_state -v"

在命令行上，-v以测试的名称结束（仔细阅读您得到的错误......