检查单元测试是否通过

Question

I developed a crawler and it's unit-tests (mainly to validate XPATHs). I want to run specific unit-tests before script execution in order to be sure that HTML structure has not changed and existing XPATHs still working. I don't want the output of unit-test, just a flag: passed or failed.

for example:

tests.py:

import unittest

class CrwTst(unittest.TestCase):
    def test_1(self):
        [..]

crawler.py

class Crawler(object):
    def action_1(self):
        [..]

and I want to work like:

if CrwTst.test_1() is True:
    Crawler.action_1()

Answer 1

You could potentially do this:

crawler.py

import unittest
from tests import CrwTst

if unittest.TextTestRunner().run(CrwTst('test_1')).wasSuccessful():
    Crawler.action_1()

Note however that you may run into an issue with circular imports, because your test presumably already depends on Crawler , and what you are looking to do will make the Crawler depend on the test. This will likely manifest itself as ImportError: cannot import name CrwTst .

To resolve that, you can dynamically import the CrwTst .

crawler.py

import unittest

def function_that_runs_crawler():
    from tests import CrwTst  # Dynamically import to resolve circular ref

    if unittest.TextTestRunner().run(CrwTst('test_1')).wasSuccessful():
        Crawler.action_1()