Fully cover most files

[edreamleo]

pytest reports good coverage for most files, but see below!

• ASAP: Create a unit test that would have failed for PR PR: remove rope.base.utils.pycompat #549.
  This PR contained a potential crasher in rope/refactor/extract.py that unit tests did not discover!
  PR PR for #553: Fix potential crasher in _getarguments #554 contains the fix.

Module	statements	missing	excluded	coverage
ropetest\refactor\extracttest.py	1070	20	0	98%
ropetest\refactor\patchedasttest.py	1018	98	0	90%
ropetest\projecttest.py	924	36	0	96%
ropetest\pycoretest.py	860	18	0	98%
ropetest\refactor\importutilstest.py	830	0	0	100%
ropetest\contrib\codeassisttest.py	798	4	0	99%
rope\refactor\patchedast.py	788	95	0	88%
rope\refactor\extract.py	767	36	0	95%
ropetest\advanced_oi_test.py	570	6	0	99%
ropetest\refactor_init_.py	557	1	0	99%
rope\base\builtins.py	549	40	0	93%
ropetest\codeanalyzetest.py	545	22	0	96%
ropetest\refactor\renametest.py	544	8	0	99%
rope\refactor\move.py	503	24	0	95%
ropetest\refactor\movetest.py	498	0	0	100%
rope\base\pyobjectsdef.py	490	23	0	95%
ropetest\refactor\inlinetest.py	472	3	0	99%
rope\base\worder.py	451	17	0	96%
rope\refactor\inline.py	409	28	0	93%
rope\contrib\codeassist.py	407	59	0	86%
rope\refactor\importutils\module_imports.py	404	8	0	98%
ropetest\builtinstest.py	370	0	0	100%
ropetest\historytest.py	336	6	0	98%
rope\base\project.py	310	30	0	90%
rope\base\codeanalyze.py	287	5	0	98%
ropetest\pyscopestest.py	282	0	0	100%
rope\contrib\generate.py	278	5	0	98%
rope\base\change.py	276	31	0	89%
rope\contrib\autoimport\sqlite.py	263	36	0	86%
rope\refactor\importutils\actions.py	260	4	0	98%
rope\base\pyscopes.py	258	8	0	97%
rope\refactor\similarfinder.py	258	13	0	95%
rope\refactor\occurrences.py	252	9	0	96%
ropetest\refactor\change_signature_test.py	247	8	0	97%
rope\base\evaluate.py	246	15	0	94%
rope\base\oi\type_hinting\evaluate.py	230	47	0	80%
rope\base\pycore.py	227	20	0	91%
ropetest\objectinfertest.py	223	0	0	100%
ropetest\contrib\generatetest.py	217	0	0	100%
ropetest\refactor\similarfindertest.py	217	0	0	100%
rope\refactor\importutils_init_.py	216	23	0	89%
rope\refactor\change_signature.py	214	19	0	91%
rope\base\fscommands.py	204	73	0	64%
rope\base\oi\transform.py	197	16	0	92%
rope\base\pyobjects.py	196	12	0	94%
rope\base\oi\objectinfo.py	178	15	0	92%
rope\base\oi\runmod.py	177	107	0	40%
rope\base\resourceobserver.py	170	5	0	97%
rope\refactor\functionutils.py	169	8	0	95%
rope\base\oi\soi.py	167	7	0	96%
rope\refactor\restructure.py	164	27	0	84%
rope\base\history.py	157	6	0	96%
rope\refactor\encapsulate_field.py	150	2	0	99%
ropetest\type_hinting_test.py	150	6	0	96%
rope\base\oi\doa.py	147	32	0	78%
rope\base\resources.py	146	11	0	92%
rope\contrib\autoimport\pickle.py	145	116	0	20%
rope\contrib\fixsyntax.py	142	11	0	92%
rope\base\taskhandle.py	140	26	0	81%
ropetest\refactor\restructuretest.py	137	0	0	100%
rope\refactor\usefunction.py	135	6	0	96%
ropetest\contrib\autoimporttest.py	135	0	0	100%
rope\base\pynames.py	127	1	0	99%
rope\refactor\suites.py	126	9	0	93%
rope\refactor\wildcards.py	126	8	0	94%
rope\refactor\importutils\importinfo.py	125	14	0	89%
rope\base\oi\objectdb.py	124	21	0	83%
ropetest\runmodtest.py	120	0	0	100%
rope\refactor\rename.py	118	13	0	89%
ropetest\objectdbtest.py	113	1	0	99%
rope\base\oi\soa.py	104	0	0	100%
ropetest\refactor\suitestest.py	103	0	0	100%
rope\base\oi\type_hinting\utils.py	89	8	0	91%
ropetest\contrib\findittest.py	89	0	0	100%
ropetest\refactor\usefunctiontest.py	89	5	0	94%
ropetest\reprtest.py	88	1	0	99%
rope\base\oi\memorydb.py	84	12	0	86%
rope\contrib\autoimport\utils.py	83	7	0	92%
rope\refactor\introduce_factory.py	82	0	0	100%
rope\base\prefs.py	79	2	0	97%
rope\base\utils_init_.py	79	8	0	90%
rope\contrib\autoimport\parse.py	76	7	0	91%
rope\contrib\autoimport\defs.py	75	0	0	100%
rope\base\arguments.py	71	4	0	94%
rope\contrib\findit.py	68	3	0	96%
rope\base\oi\type_hinting\providers\docstrings.py	67	2	0	97%
rope\refactor\sourceutils.py	66	0	0	100%
rope\base\libutils.py	64	3	0	95%
rope\refactor\method_object.py	64	2	0	97%
ropetest\testutils.py	62	10	0	84%
rope\base\ast.py	53	1	0	98%
rope\base\utils\datastructures.py	53	22	0	58%
rope\contrib\autoimport\models.py	50	0	0	100%
rope\refactor\introduce_parameter.py	48	0	0	100%
ropetest\doatest.py	48	0	0	100%
ropetest\refactor\multiprojecttest.py	48	0	0	100%
ropetest\simplifytest.py	47	0	0	100%
rope\contrib\finderrors.py	46	1	0	98%
rope\refactor\multiproject.py	44	2	0	95%
rope\base\stdmods.py	41	9	0	78%
rope\base\astutils.py	40	2	0	95%
ropetest\contrib\fixmodnamestest.py	40	0	0	100%
rope\base\pynamesdef.py	39	2	0	95%
ropetest_init_.py	39	20	0	49%
ropetest\contrib\finderrorstest.py	36	0	0	100%
rope\contrib\fixmodnames.py	35	0	0	100%
ropetest\contrib\autoimport\conftest.py	34	0	0	100%
rope\base\oi\type_hinting\providers\inheritance.py	32	0	0	100%
rope\base\simplify.py	32	0	0	100%
rope\refactor\localtofield.py	31	3	0	90%
rope\base\oi\type_hinting\factory.py	30	0	0	100%
ropetest\contrib\autoimport\modeltest.py	28	0	0	100%
rope\base\oi\type_hinting\providers\numpydocstrings.py	27	13	0	52%
rope\base\oi\type_hinting\providers\composite.py	25	0	0	100%
rope\refactor\topackage.py	25	0	0	100%
ropetest\contrib\autoimport\utilstest.py	25	0	0	100%
ropetest\contrib\changestacktest.py	25	0	0	100%
rope\contrib\changestack.py	23	0	0	100%
ropetest\contrib_init_.py	23	12	0	48%
rope\base\oi\type_hinting\providers\pep0484_type_comments.py	21	0	0	100%
rope\base\exceptions.py	20	3	0	85%
rope_init_.py	13	8	0	38%
rope\base\utils\pycompat.py	13	1	0	92%
rope\base\oi\type_hinting\providers\interfaces.py	11	3	0	73%
ropetest\contrib\autoimport\parsetest.py	11	0	0	100%
rope\base\oi\type_hinting\interfaces.py	9	4	0	56%
rope\base\oi\type_hinting\resolvers\composite.py	9	0	0	100%
rope\base\oi\type_hinting\resolvers\types.py	8	0	0	100%
rope\contrib\autoimport_init_.py	4	0	0	100%
rope\base\oi\type_hinting\resolvers\interfaces.py	3	1	0	67%
rope\refactor_init_.py	3	0	0	100%
rope\base_init_.py	1	0	0	100%
rope\base\oi_init_.py	0	0	0	100%
rope\base\oi\type_hinting_init_.py	0	0	0	100%
rope\base\oi\type_hinting\providers_init_.py	0	0	0	100%
rope\base\oi\type_hinting\resolvers_init_.py	0	0	0	100%
rope\contrib_init_.py	0	0	0	100%
Total	25881	1559	0	94%

• Mark harmless "uncovered" statements with #pragma no cover.
• Remove python2-only statements.
• Create unit tests for all other missing statements.