Features common to HTTPPasswordMgr and HTTPProxyPasswordMgr
===========================================================

(mgr_class gets here through globs argument)

>>> mgr = mgr_class()
>>> add = mgr.add_password

>>> add("Some Realm", "http://example.com/", "joe", "password")
>>> add("Some Realm", "http://example.com/ni", "ni", "ni")
>>> add("c", "http://example.com/foo", "foo", "ni")
>>> add("c", "http://example.com/bar", "bar", "nini")
>>> add("b", "http://example.com/", "first", "blah")
>>> add("b", "http://example.com/", "second", "spam")
>>> add("a", "http://example.com", "1", "a")
>>> add("Some Realm", "http://c.example.com:3128", "3", "c")
>>> add("Some Realm", "d.example.com", "4", "d")
>>> add("Some Realm", "e.example.com:3128", "5", "e")

>>> mgr.find_user_password("Some Realm", "example.com")
('joe', 'password')
>>> mgr.find_user_password("Some Realm", "http://example.com")
('joe', 'password')
>>> mgr.find_user_password("Some Realm", "http://example.com/")
('joe', 'password')
>>> mgr.find_user_password("Some Realm", "http://example.com/spam")
('joe', 'password')
>>> mgr.find_user_password("Some Realm", "http://example.com/spam/spam")
('joe', 'password')
>>> mgr.find_user_password("c", "http://example.com/foo")
('foo', 'ni')
>>> mgr.find_user_password("c", "http://example.com/bar")
('bar', 'nini')

Actually, this is really undefined ATM
#Currently, we use the highest-level path where more than one match:
#
#>>> mgr.find_user_password("Some Realm", "http://example.com/ni")
#('joe', 'password')

Use latest add_password() in case of conflict:

>>> mgr.find_user_password("b", "http://example.com/")
('second', 'spam')

No special relationship between a.example.com and example.com:

>>> mgr.find_user_password("a", "http://example.com/")
('1', 'a')
>>> mgr.find_user_password("a", "http://a.example.com/")
(None, None)

Ports:

>>> mgr.find_user_password("Some Realm", "c.example.com")
(None, None)
>>> mgr.find_user_password("Some Realm", "c.example.com:3128")
('3', 'c')
>>> mgr.find_user_password("Some Realm", "http://c.example.com:3128")
('3', 'c')
>>> mgr.find_user_password("Some Realm", "d.example.com")
('4', 'd')
>>> mgr.find_user_password("Some Realm", "e.example.com:3128")
('5', 'e')


Default port tests
------------------

>>> mgr = mgr_class()
>>> add = mgr.add_password

The point to note here is that we can't guess the default port if there's
no scheme.  This applies to both add_password and find_user_password.

>>> add("f", "http://g.example.com:80", "10", "j")
>>> add("g", "http://h.example.com", "11", "k")
>>> add("h", "i.example.com:80", "12", "l")
>>> add("i", "j.example.com", "13", "m")
>>> mgr.find_user_password("f", "g.example.com:100")
(None, None)
>>> mgr.find_user_password("f", "g.example.com:80")
('10', 'j')
>>> mgr.find_user_password("f", "g.example.com")
(None, None)
>>> mgr.find_user_password("f", "http://g.example.com:100")
(None, None)
>>> mgr.find_user_password("f", "http://g.example.com:80")
('10', 'j')
>>> mgr.find_user_password("f", "http://g.example.com")
('10', 'j')
>>> mgr.find_user_password("g", "h.example.com")
('11', 'k')
>>> mgr.find_user_password("g", "h.example.com:80")
('11', 'k')
>>> mgr.find_user_password("g", "http://h.example.com:80")
('11', 'k')
>>> mgr.find_user_password("h", "i.example.com")
(None, None)
>>> mgr.find_user_password("h", "i.example.com:80")
('12', 'l')
>>> mgr.find_user_password("h", "http://i.example.com:80")
('12', 'l')
>>> mgr.find_user_password("i", "j.example.com")
('13', 'm')
>>> mgr.find_user_password("i", "j.example.com:80")
(None, None)
>>> mgr.find_user_password("i", "http://j.example.com")
('13', 'm')
>>> mgr.find_user_password("i", "http://j.example.com:80")
(None, None)


Features specific to HTTPProxyPasswordMgr
=========================================

Default realm:

>>> mgr = mechanize.HTTPProxyPasswordMgr()
>>> add = mgr.add_password

>>> mgr.find_user_password("d", "f.example.com")
(None, None)
>>> add(None, "f.example.com", "6", "f")
>>> mgr.find_user_password("d", "f.example.com")
('6', 'f')

Default host/port:

>>> mgr.find_user_password("e", "g.example.com")
(None, None)
>>> add("e", None, "7", "g")
>>> mgr.find_user_password("e", "g.example.com")
('7', 'g')

Default realm and host/port:

>>> mgr.find_user_password("f", "h.example.com")
(None, None)
>>> add(None, None, "8", "h")
>>> mgr.find_user_password("f", "h.example.com")
('8', 'h')

Default realm beats default host/port:

>>> add("d", None, "9", "i")
>>> mgr.find_user_password("d", "f.example.com")
('6', 'f')