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from base64 import decodestring
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from unittest import TestCase
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from IPython.utils.py3compat import unicode_type
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from ..nbjson import reads, writes
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from .. import nbjson
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from .nbexamples import nb0
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from . import formattest
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class TestJSON(formattest.NBFormatTest, TestCase):
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nb0_ref = None
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ext = 'ipynb'
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mod = nbjson
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def test_roundtrip_nosplit(self):
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"""Ensure that multiline blobs are still readable"""
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# ensures that notebooks written prior to splitlines change
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# are still readable.
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s = writes(nb0, split_lines=False)
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self.assertEqual(nbjson.reads(s),nb0)
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def test_roundtrip_split(self):
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"""Ensure that splitting multiline blocks is safe"""
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# This won't differ from test_roundtrip unless the default changes
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s = writes(nb0, split_lines=True)
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self.assertEqual(nbjson.reads(s),nb0)
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def test_read_png(self):
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"""PNG output data is b64 unicode"""
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s = writes(nb0)
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nb1 = nbjson.reads(s)
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found_png = False
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for cell in nb1.cells:
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if not 'outputs' in cell:
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continue
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for output in cell.outputs:
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if not 'data' in output:
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continue
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if 'image/png' in output.data:
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found_png = True
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pngdata = output.data['image/png']
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self.assertEqual(type(pngdata), unicode_type)
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# test that it is valid b64 data
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b64bytes = pngdata.encode('ascii')
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raw_bytes = decodestring(b64bytes)
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assert found_png, "never found png output"
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def test_read_jpeg(self):
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"""JPEG output data is b64 unicode"""
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s = writes(nb0)
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nb1 = nbjson.reads(s)
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found_jpeg = False
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for cell in nb1.cells:
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if not 'outputs' in cell:
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continue
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for output in cell.outputs:
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if not 'data' in output:
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continue
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if 'image/jpeg' in output.data:
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found_jpeg = True
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jpegdata = output.data['image/jpeg']
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self.assertEqual(type(jpegdata), unicode_type)
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# test that it is valid b64 data
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b64bytes = jpegdata.encode('ascii')
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raw_bytes = decodestring(b64bytes)
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assert found_jpeg, "never found jpeg output"
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