103 lines
3.3 KiB
Python
103 lines
3.3 KiB
Python
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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import os
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import sys
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import unittest
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import base64
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from unittest.mock import patch
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from jupyter_console.ptshell import ZMQTerminalInteractiveShell
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from ipython_genutils.tempdir import TemporaryDirectory
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from ipython_genutils.testing.decorators import skip_without
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from ipython_genutils.ipstruct import Struct
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SCRIPT_PATH = os.path.join(
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os.path.abspath(os.path.dirname(__file__)), 'writetofile.py')
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class NonCommunicatingShell(ZMQTerminalInteractiveShell):
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"""A testing shell class that doesn't attempt to communicate with the kernel"""
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def init_kernel_info(self):
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pass
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class ZMQTerminalInteractiveShellTestCase(unittest.TestCase):
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def setUp(self):
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self.shell = NonCommunicatingShell()
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self.raw = b'dummy data'
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self.mime = 'image/png'
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self.data = {self.mime: base64.encodebytes(self.raw).decode('ascii')}
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def test_call_pil_by_default(self):
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pil_called_with = []
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def pil_called(data, mime):
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pil_called_with.append(data)
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def raise_if_called(*args, **kwds):
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assert False
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shell = self.shell
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shell.handle_image_PIL = pil_called
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shell.handle_image_stream = raise_if_called
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shell.handle_image_tempfile = raise_if_called
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shell.handle_image_callable = raise_if_called
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shell.handle_image(None, None) # arguments are dummy
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assert len(pil_called_with) == 1
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@skip_without('PIL')
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def test_handle_image_PIL(self):
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from PIL import Image, ImageShow
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open_called_with = []
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show_called_with = []
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def fake_open(arg):
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open_called_with.append(arg)
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def fake_show(img):
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show_called_with.append(img)
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with patch.object(Image, 'open', fake_open), \
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patch.object(ImageShow, 'show', fake_show):
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self.shell.handle_image_PIL(self.data, self.mime)
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self.assertEqual(len(open_called_with), 1)
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self.assertEqual(len(show_called_with), 1)
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self.assertEqual(open_called_with[0].getvalue(), self.raw)
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def check_handler_with_file(self, inpath, handler):
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shell = self.shell
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configname = '{0}_image_handler'.format(handler)
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funcname = 'handle_image_{0}'.format(handler)
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assert hasattr(shell, configname)
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assert hasattr(shell, funcname)
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with TemporaryDirectory() as tmpdir:
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outpath = os.path.join(tmpdir, 'data')
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cmd = [sys.executable, SCRIPT_PATH, inpath, outpath]
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setattr(shell, configname, cmd)
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getattr(shell, funcname)(self.data, self.mime)
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# cmd is called and file is closed. So it's safe to open now.
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with open(outpath, 'rb') as file:
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transferred = file.read()
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self.assertEqual(transferred, self.raw)
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def test_handle_image_stream(self):
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self.check_handler_with_file('-', 'stream')
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def test_handle_image_tempfile(self):
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self.check_handler_with_file('{file}', 'tempfile')
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def test_handle_image_callable(self):
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called_with = []
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self.shell.callable_image_handler = called_with.append
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self.shell.handle_image_callable(self.data, self.mime)
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self.assertEqual(len(called_with), 1)
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assert called_with[0] is self.data
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