Python测试框架nose之设计case(2)

官方链接：

test tools

1.nose 框架同unittest一样支持包，模块，类级别的setUp和tearDown

所有在test模块下的函数，凡是符合正则testMatch条件((?:^|[\\b_\\.-])[Tt]est都封装入FunctionTestCase。

test functions支持函数级别的setUp

例：

def setup_func():    "set up test fixtures"def teardown_func():    "tear down test fixtures"@with_setup(setup_func, teardown_func)def test():    "test ..."

2.nose.tools的使用

nose.tools.ok_(expr,msg=None)

Shorthand for assert. Saves 3 whole characters!

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 metadataof 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.

@raises(TypeError, ValueError)def test_raises_type_error():    raise TypeError("This test passes")@raises(Exception)def test_that_fails_by_passing():    pass

nose.tools.set_trace()

Call pdb.set_trace in the calling frame, first restoringsys.stdout to the real output stream. Note that sys.stdout is NOTreset to whatever it was before the call once pdb is done!

nose.tools.timed(limit)

Test must finish within specified time limit to pass.

Example use:

@timed(.1)def test_that_fails():    time.sleep(.2)

nose.tools.with_setup(setup=None,teardown=None)

Decorator to add setup and/or teardown methods to a test function:

@with_setup(setup, teardown)def test_something():    " ... "

Note that with_setup is useful only for test functions, not for testmethods or inside of TestCase subclasses.

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