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