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"""Tests for the key interactiveshell module.
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Historically the main classes in interactiveshell have been under-tested. This
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module should grow as many single-method tests as possible to trap many of the
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recurring bugs we seem to encounter with high-level interaction.
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Authors
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-------
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* Fernando Perez
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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# stdlib
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import unittest
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from cStringIO import StringIO
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from IPython.testing import decorators as dec
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from IPython.utils import io
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#-----------------------------------------------------------------------------
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# Tests
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#-----------------------------------------------------------------------------
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class InteractiveShellTestCase(unittest.TestCase):
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def test_naked_string_cells(self):
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"""Test that cells with only naked strings are fully executed"""
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ip = get_ipython()
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# First, single-line inputs
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ip.run_cell('"a"\n')
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self.assertEquals(ip.user_ns['_'], 'a')
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# And also multi-line cells
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ip.run_cell('"""a\nb"""\n')
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self.assertEquals(ip.user_ns['_'], 'a\nb')
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def test_run_empty_cell(self):
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"""Just make sure we don't get a horrible error with a blank
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cell of input. Yes, I did overlook that."""
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ip = get_ipython()
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old_xc = ip.execution_count
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ip.run_cell('')
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self.assertEquals(ip.execution_count, old_xc)
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def test_run_cell_multiline(self):
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"""Multi-block, multi-line cells must execute correctly.
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"""
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ip = get_ipython()
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src = '\n'.join(["x=1",
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"y=2",
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"if 1:",
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" x += 1",
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" y += 1",])
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ip.run_cell(src)
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self.assertEquals(ip.user_ns['x'], 2)
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self.assertEquals(ip.user_ns['y'], 3)
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def test_multiline_string_cells(self):
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"Code sprinkled with multiline strings should execute (GH-306)"
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ip = get_ipython()
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ip.run_cell('tmp=0')
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self.assertEquals(ip.user_ns['tmp'], 0)
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ip.run_cell('tmp=1;"""a\nb"""\n')
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self.assertEquals(ip.user_ns['tmp'], 1)
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def test_dont_cache_with_semicolon(self):
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"Ending a line with semicolon should not cache the returned object (GH-307)"
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ip = get_ipython()
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oldlen = len(ip.user_ns['Out'])
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a = ip.run_cell('1;')
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newlen = len(ip.user_ns['Out'])
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self.assertEquals(oldlen, newlen)
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#also test the default caching behavior
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ip.run_cell('1')
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newlen = len(ip.user_ns['Out'])
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self.assertEquals(oldlen+1, newlen)
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def test_In_variable(self):
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"Verify that In variable grows with user input (GH-284)"
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ip = get_ipython()
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oldlen = len(ip.user_ns['In'])
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ip.run_cell('1;')
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newlen = len(ip.user_ns['In'])
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self.assertEquals(oldlen+1, newlen)
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self.assertEquals(ip.user_ns['In'][-1],'1;')
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def test_magic_names_in_string(self):
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ip = get_ipython()
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ip.run_cell('a = """\n%exit\n"""')
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self.assertEquals(ip.user_ns['a'], '\n%exit\n')
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def test_alias_crash(self):
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"""Errors in prefilter can't crash IPython"""
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ip = get_ipython()
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ip.run_cell('%alias parts echo first %s second %s')
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# capture stderr:
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save_err = io.stderr
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io.stderr = StringIO()
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ip.run_cell('parts 1')
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err = io.stderr.getvalue()
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io.stderr = save_err
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self.assertEquals(err.split(':')[0], 'ERROR')
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