forker.py:
    Extend start_zeo_server() on Windows with arg that specifies port,
    which is used to restart the server on the same port.

    Remove unnecessary imports.

    Set PYTHONPATH for the spawned script.

testZEO.py:
    Refactor ConnectionTests into abstract base class with two platform-
    specific subclasses.

    Add goofy test_suite() function, which is goofy because I can't figure
    out how to use unittest any other way.

winserver.py:
    Keep track of storage in ZEOTestServer so that its close() method can be
    called when the server exits.

winserver.py: A small script that runs a ZEO StorageServer and a ZEOTestServer.
    The ZEOTestServer is used to kill the StorageServer during a unit test's
    teardown phases.  As soon as a client connects to that server, it exits
    the process.

forker.py: Now forks and spawns, depending on os.
    XXX This needs to be cleaned up a lot, since the interfaces on Windows and
    Unix are nothing alike.

testZEO.py:  Add WindowsGenericTests and WindowsZEOFileStorageTests.
    These test cases use the Windows-specific forker interface.  They also
    use getStorageInfo() to describe the storage, rather than getStorage()
    to create the storage.  This is necessary because the storage instance
    is created in a separate process.

_p_resolveConflict could not handle tuples from getstate()
properly

The testrunner reports all tests passed after these changes.
Remove unnecessary path munging and attempts to import ZODB.
Update uses of whrandom to use random.

VerboseTextTestRunner() => TestTestRunner(verbosity=2)

glob() and os.remove().

properly.

writes after an abort.  This specifically flexes a bug discovered by
Shane in Full storage.

bug.

instead of any other error that may be raised.

After consultation with Jim, we agreed that Full's behavior vis object
serial numbers after a version commit/abort are correct.  The new
revision should get the serial number of the transaction that did the
commit/abort.

FileStorage is actually broken here; the new revision gets the same
serial number as the last in-version revision.  However, the way the
tests are written, it works for either storage, so I'm just updating
some comments to explain the situation.

Note: Jim also explained that history()'s "version" argument should be
ignored.  Doesn't make much difference to these tests though.

storage API.

including self) to be called `size' not `length'.  This should be
considered part of the contract of this method, so the keyword
argument name has been changed.

subclass Transaction.

made keys() method return a *copy* of the cached keys list, preventing mutations of the cached keys list that could cause later problems.  (Collector 2283).

(Collector #2277)

If an exception is raised, make sure the current transaction is
aborted.  And catch more of the oddball exceptions that can get raised
when a server disconnects -- like thread.error.