The Nose Testing Tools module provides a number of testing aids that you may find useful, including decorators for restricting test execution time and testing for exceptions, and all of the same assertX methods found in unittest.TestCase.
- nose.tools.ok_(expr, msg = None) − Shorthand for assert.
- nose.tools.eq_(a, b, msg = None) − Shorthand for ‘assert a == b, “%r != %r” % (a, b)
- nose.tools.make_decorator(func) − Wraps a test decorator so as to properly replicate metadata of the decorated function, including nose’s additional stuff (namely, setup and teardown).
- nose.tools.raises(*exceptions) − Test must raise one of expected exceptions to pass.
- nose.tools.timed(limit) − Test must finish within specified time limit to pass
- nose.tools.istest(func) − Decorator to mark a function or method as a test
- nose.tools.nottest(func) − Decorator to mark a function or method as not a test
Parameterized Nose Testing Tools
Python’s testing framework, unittest, doesn’t have a simple way of running parametrized test cases. In other words, you can’t easily pass arguments into a unittest.TestCase from outside.
However, pytest module ports test parametrization in several well-integrated ways −
- pytest.fixture() allows you to define parametrization at the level of fixture functions.
- @pytest.mark.parametrize allows to define parametrization at the function or class level. It provides multiple argument/fixture sets for a particular test function or class.
- pytest_generate_tests enables implementing your own custom dynamic parametrization scheme or extensions.
A third-party module ‘nose-parameterized’ allows Parameterized testing with any Python test framework. It can be downloaded from this link − https://github.com/wolever/nose-parameterized
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