Issue2215

Much as we saw with #1631, java.util.List objects do not have all the list methods, so they do not duck type properly as Python list objects (or more properly collections.Sequence):

$ jython27
>>> from java.util import ArrayList
>>> x = ArrayList()
>>> x.append("foo")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'java.util.ArrayList' object has no attribute 'append'

Note that we actually make this guarantee, but don't fulfill it:
https://hg.python.org/jython/rev/9fef5da411e5

>>> from collections import Sequence
>>> isinstance(x, Sequence)
True

Fix for beta 4. Use list_tests support library (used by test_list) to verify ops. Also looks at comprehensive support for set.

I can take this on.

Santoso, sounds good. (I assume you have started, but if not, here's that ack!) I changed to nobody since you're not yet in the bugtracker as someone who can be assigned to.

I'm uploading commits for this to my bitbucket mirror: https://bitbucket.org/santa4nt/jython/commits/branch/fix-issue-2215

Work in progress...

Changing this to urgent since there's a (small) chance that it breaks backwards compatibility, and so should be in beta 4.

I plan to finish Santoso's work, presumably sometime this week.

Fixed as of https://hg.python.org/jython/rev/ae2a1efe4192

Note the backwards breaking change: remove will now raise a ValueError if the item is absent