Method test_build_opener

Lib/test/test_urllib2.py:1856–1898

(self)

                            for h in opener.handlers))

    def test_build_opener(self):
        class MyHTTPHandler(urllib.request.HTTPHandler):
            pass

        class FooHandler(urllib.request.BaseHandler):
            def foo_open(self):
                pass

        class BarHandler(urllib.request.BaseHandler):
            def bar_open(self):
                pass

        build_opener = urllib.request.build_opener

        o = build_opener(FooHandler, BarHandler)
        self.opener_has_handler(o, FooHandler)
        self.opener_has_handler(o, BarHandler)

        # can take a mix of classes and instances
        o = build_opener(FooHandler, BarHandler())
        self.opener_has_handler(o, FooHandler)
        self.opener_has_handler(o, BarHandler)

        # subclasses of default handlers override default handlers
        o = build_opener(MyHTTPHandler)
        self.opener_has_handler(o, MyHTTPHandler)

        # a particular case of overriding: default handlers can be passed
        # in explicitly
        o = build_opener()
        self.opener_has_handler(o, urllib.request.HTTPHandler)
        o = build_opener(urllib.request.HTTPHandler)
        self.opener_has_handler(o, urllib.request.HTTPHandler)
        o = build_opener(urllib.request.HTTPHandler())
        self.opener_has_handler(o, urllib.request.HTTPHandler)

        # Issue2670: multiple handlers sharing the same base class
        class MyOtherHTTPHandler(urllib.request.HTTPHandler):
            pass

        o = build_opener(MyHTTPHandler, MyOtherHTTPHandler)
        self.opener_has_handler(o, MyHTTPHandler)
        self.opener_has_handler(o, MyOtherHTTPHandler)

    def test_HTTPError_interface(self):
        """