test_wsgiref.py 文件源码

def compare_generic_iter(make_it,match):
    """Utility to compare a generic 2.1/2.2+ iterator with an iterable

    If running under Python 2.2+, this tests the iterator using iter()/next(),
    as well as __getitem__.  'make_it' must be a function returning a fresh
    iterator to be tested (since this may test the iterator twice)."""

    it = make_it()
    n = 0
    for item in match:
        if not it[n]==item: raise AssertionError
        n+=1
    try:
        it[n]
    except IndexError:
        pass
    else:
        raise AssertionError("Too many items from __getitem__",it)

    try:
        iter, StopIteration
    except NameError:
        pass
    else:
        # Only test iter mode under 2.2+
        it = make_it()
        if not iter(it) is it: raise AssertionError
        for item in match:
            if not it.next()==item: raise AssertionError
        try:
            it.next()
        except StopIteration:
            pass
        else:
            raise AssertionError("Too many items from .next()",it)