[issue1550273] Fix numerous bugs in unittest

[Ionut Turturica]

Ionut Turturica <jonozzz at yahoo.com> added the comment:

I am a little bit concerned with the new __eq__:

    def __eq__(self, other):
        if type(self) is not type(other):
            return False
        return self._tests == other._tests

Why did you use "self._tests == other._tests" instead of "self is other" ?

After I upgraded to 2.6 I started to have some issues with a breadth
first iterator for a TestSuite and I tracked them down to this eq method.

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nosy: +jonozzz

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<http://bugs.python.org/issue1550273>
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