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# -*- coding: utf8 -*-
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from unittest import TestCase
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from IPython.utils.py3compat import string_types, iteritems
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from . import formattest
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from .. import nbpy
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from .nbexamples import nb0, nb0_py
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class TestPy(formattest.NBFormatTest, TestCase):
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nb0_ref = nb0_py
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ext = 'py'
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mod = nbpy
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ignored_keys = ['collapsed', 'outputs', 'prompt_number', 'metadata']
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def assertSubset(self, da, db):
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"""assert that da is a subset of db, ignoring self.ignored_keys.
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Called recursively on containers, ultimately comparing individual
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elements.
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"""
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if isinstance(da, dict):
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for k,v in iteritems(da):
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if k in self.ignored_keys:
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continue
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self.assertTrue(k in db)
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self.assertSubset(v, db[k])
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elif isinstance(da, list):
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for a,b in zip(da, db):
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self.assertSubset(a,b)
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else:
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if isinstance(da, string_types) and isinstance(db, string_types):
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# pyfile is not sensitive to preserving leading/trailing
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# newlines in blocks through roundtrip
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da = da.strip('\n')
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db = db.strip('\n')
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self.assertEqual(da, db)
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return True
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def assertNBEquals(self, nba, nbb):
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# since roundtrip is lossy, only compare keys that are preserved
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# assumes nba is read from my file format
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return self.assertSubset(nba, nbb)
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