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# -*- coding: utf-8 -*-
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"""Tests for the TerminalInteractiveShell and related pieces."""
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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 sys
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import unittest
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from IPython.core.inputtransformer import InputTransformer
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from IPython.testing import tools as tt
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from IPython.utils.capture import capture_output
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# Decorator for interaction loop tests -----------------------------------------
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class mock_input_helper(object):
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"""Machinery for tests of the main interact loop.
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Used by the mock_input decorator.
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"""
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def __init__(self, testgen):
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self.testgen = testgen
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self.exception = None
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self.ip = get_ipython()
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def __enter__(self):
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self.orig_prompt_for_code = self.ip.prompt_for_code
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self.ip.prompt_for_code = self.fake_input
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return self
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def __exit__(self, etype, value, tb):
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self.ip.prompt_for_code = self.orig_prompt_for_code
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def fake_input(self):
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try:
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return next(self.testgen)
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except StopIteration:
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self.ip.keep_running = False
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return u''
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except:
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self.exception = sys.exc_info()
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self.ip.keep_running = False
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return u''
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def mock_input(testfunc):
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"""Decorator for tests of the main interact loop.
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Write the test as a generator, yield-ing the input strings, which IPython
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will see as if they were typed in at the prompt.
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"""
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def test_method(self):
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testgen = testfunc(self)
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with mock_input_helper(testgen) as mih:
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mih.ip.interact()
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if mih.exception is not None:
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# Re-raise captured exception
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etype, value, tb = mih.exception
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import traceback
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traceback.print_tb(tb, file=sys.stdout)
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del tb # Avoid reference loop
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raise value
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return test_method
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# Test classes -----------------------------------------------------------------
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class InteractiveShellTestCase(unittest.TestCase):
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def rl_hist_entries(self, rl, n):
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"""Get last n readline history entries as a list"""
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return [rl.get_history_item(rl.get_current_history_length() - x)
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for x in range(n - 1, -1, -1)]
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@mock_input
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def test_inputtransformer_syntaxerror(self):
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ip = get_ipython()
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transformer = SyntaxErrorTransformer()
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ip.input_splitter.python_line_transforms.append(transformer)
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ip.input_transformer_manager.python_line_transforms.append(transformer)
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try:
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#raise Exception
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with tt.AssertPrints('4', suppress=False):
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yield u'print(2*2)'
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with tt.AssertPrints('SyntaxError: input contains', suppress=False):
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yield u'print(2345) # syntaxerror'
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with tt.AssertPrints('16', suppress=False):
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yield u'print(4*4)'
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finally:
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ip.input_splitter.python_line_transforms.remove(transformer)
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ip.input_transformer_manager.python_line_transforms.remove(transformer)
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def test_plain_text_only(self):
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ip = get_ipython()
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formatter = ip.display_formatter
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assert formatter.active_types == ['text/plain']
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assert not formatter.ipython_display_formatter.enabled
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class Test(object):
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def __repr__(self):
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return "<Test %i>" % id(self)
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def _repr_html_(self):
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return '<html>'
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# verify that HTML repr isn't computed
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obj = Test()
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data, _ = formatter.format(obj)
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self.assertEqual(data, {'text/plain': repr(obj)})
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class Test2(Test):
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def _ipython_display_(self):
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from IPython.display import display
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display('<custom>')
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# verify that _ipython_display_ shortcut isn't called
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obj = Test2()
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with capture_output() as captured:
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data, _ = formatter.format(obj)
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self.assertEqual(data, {'text/plain': repr(obj)})
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assert captured.stdout == ''
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class SyntaxErrorTransformer(InputTransformer):
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def push(self, line):
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pos = line.find('syntaxerror')
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if pos >= 0:
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e = SyntaxError('input contains "syntaxerror"')
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e.text = line
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e.offset = pos + 1
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raise e
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return line
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def reset(self):
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pass
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class TerminalMagicsTestCase(unittest.TestCase):
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def test_paste_magics_blankline(self):
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"""Test that code with a blank line doesn't get split (gh-3246)."""
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ip = get_ipython()
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s = ('def pasted_func(a):\n'
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' b = a+1\n'
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'\n'
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' return b')
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tm = ip.magics_manager.registry['TerminalMagics']
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tm.store_or_execute(s, name=None)
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self.assertEqual(ip.user_ns['pasted_func'](54), 55)
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