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"""Test suite for pylab_import_all magic
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Modified from the irunner module but using regex.
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"""
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from __future__ import print_function
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# Global to make tests extra verbose and help debugging
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VERBOSE = True
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# stdlib imports
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import sys
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import unittest
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import re
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# IPython imports
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from IPython.lib import irunner
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from IPython.testing import decorators
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from IPython.utils.py3compat import PY3
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if PY3:
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from io import StringIO
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else:
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from StringIO import StringIO
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def pylab_not_importable():
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"""Test if importing pylab fails. (For example, when having no display)"""
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try:
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import pylab
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return False
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except:
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return True
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# Testing code begins
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class RunnerTestCase(unittest.TestCase):
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def setUp(self):
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self.out = StringIO()
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#self.out = sys.stdout
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def _test_runner(self,runner,source,output):
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"""Test that a given runner's input/output match."""
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runner.run_source(source)
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out = self.out.getvalue()
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#out = ''
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# this output contains nasty \r\n lineends, and the initial ipython
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# banner. clean it up for comparison, removing lines of whitespace
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output_l = [l for l in output.splitlines() if l and not l.isspace()]
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out_l = [l for l in out.splitlines() if l and not l.isspace()]
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mismatch = 0
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if len(output_l) != len(out_l):
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message = ("Mismatch in number of lines\n\n"
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"Expected:\n"
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"~~~~~~~~~\n"
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"%s\n\n"
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"Got:\n"
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"~~~~~~~~~\n"
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"%s"
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) % ("\n".join(output_l), "\n".join(out_l))
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self.fail(message)
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for n in range(len(output_l)):
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# Do a line-by-line comparison
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ol1 = output_l[n].strip()
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ol2 = out_l[n].strip()
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if not re.match(ol1,ol2):
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mismatch += 1
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if VERBOSE:
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print('<<< line %s does not match:' % n)
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print(repr(ol1))
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print(repr(ol2))
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print('>>>')
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self.assertTrue(mismatch==0,'Number of mismatched lines: %s' %
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mismatch)
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@decorators.skip_if_no_x11
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@decorators.skipif_not_matplotlib
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@decorators.skipif(pylab_not_importable, "Likely a run without X.")
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def test_pylab_import_all_enabled(self):
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"Verify that plot is available when pylab_import_all = True"
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source = """
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from IPython.config.application import Application
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app = Application.instance()
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app.pylab_import_all = True
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pylab
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ip=get_ipython()
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'plot' in ip.user_ns
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"""
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output = """
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In \[1\]: from IPython\.config\.application import Application
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In \[2\]: app = Application\.instance\(\)
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In \[3\]: app\.pylab_import_all = True
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In \[4\]: pylab
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^Using matplotlib backend:
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Populating the interactive namespace from numpy and matplotlib
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In \[5\]: ip=get_ipython\(\)
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In \[6\]: \'plot\' in ip\.user_ns
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Out\[6\]: True
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"""
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runner = irunner.IPythonRunner(out=self.out)
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self._test_runner(runner,source,output)
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@decorators.skip_if_no_x11
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@decorators.skipif_not_matplotlib
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@decorators.skipif(pylab_not_importable, "Likely a run without X.")
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def test_pylab_import_all_disabled(self):
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"Verify that plot is not available when pylab_import_all = False"
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source = """
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from IPython.config.application import Application
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app = Application.instance()
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app.pylab_import_all = False
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pylab
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ip=get_ipython()
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'plot' in ip.user_ns
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"""
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output = """
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In \[1\]: from IPython\.config\.application import Application
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In \[2\]: app = Application\.instance\(\)
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In \[3\]: app\.pylab_import_all = False
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In \[4\]: pylab
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^Using matplotlib backend:
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Populating the interactive namespace from numpy and matplotlib
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In \[5\]: ip=get_ipython\(\)
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In \[6\]: \'plot\' in ip\.user_ns
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Out\[6\]: False
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"""
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runner = irunner.IPythonRunner(out=self.out)
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self._test_runner(runner,source,output)
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