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