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# -*- coding: utf-8 -*-
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"""Tests for the inputsplitter module."""
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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 unittest
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import sys
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import nose.tools as nt
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from IPython.core import inputsplitter as isp
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from IPython.core.inputtransformer import InputTransformer
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from IPython.core.tests.test_inputtransformer import syntax, syntax_ml
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from IPython.testing import tools as tt
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#-----------------------------------------------------------------------------
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# Semi-complete examples (also used as tests)
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#-----------------------------------------------------------------------------
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# Note: at the bottom, there's a slightly more complete version of this that
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# can be useful during development of code here.
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def mini_interactive_loop(input_func):
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"""Minimal example of the logic of an interactive interpreter loop.
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This serves as an example, and it is used by the test system with a fake
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raw_input that simulates interactive input."""
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from IPython.core.inputsplitter import InputSplitter
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isp = InputSplitter()
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# In practice, this input loop would be wrapped in an outside loop to read
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# input indefinitely, until some exit/quit command was issued. Here we
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# only illustrate the basic inner loop.
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while isp.push_accepts_more():
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indent = ' '*isp.get_indent_spaces()
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prompt = '>>> ' + indent
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line = indent + input_func(prompt)
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isp.push(line)
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# Here we just return input so we can use it in a test suite, but a real
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# interpreter would instead send it for execution somewhere.
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src = isp.source_reset()
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#print 'Input source was:\n', src # dbg
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return src
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#-----------------------------------------------------------------------------
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# Test utilities, just for local use
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#-----------------------------------------------------------------------------
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def assemble(block):
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"""Assemble a block into multi-line sub-blocks."""
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return ['\n'.join(sub_block)+'\n' for sub_block in block]
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def pseudo_input(lines):
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"""Return a function that acts like raw_input but feeds the input list."""
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ilines = iter(lines)
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def raw_in(prompt):
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try:
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return next(ilines)
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except StopIteration:
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return ''
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return raw_in
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#-----------------------------------------------------------------------------
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# Tests
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#-----------------------------------------------------------------------------
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def test_spaces():
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tests = [('', 0),
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(' ', 1),
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('\n', 0),
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(' \n', 1),
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('x', 0),
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(' x', 1),
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(' x',2),
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(' x',4),
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# Note: tabs are counted as a single whitespace!
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('\tx', 1),
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('\t x', 2),
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]
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tt.check_pairs(isp.num_ini_spaces, tests)
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def test_remove_comments():
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tests = [('text', 'text'),
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('text # comment', 'text '),
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('text # comment\n', 'text \n'),
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('text # comment \n', 'text \n'),
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('line # c \nline\n','line \nline\n'),
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('line # c \nline#c2 \nline\nline #c\n\n',
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'line \nline\nline\nline \n\n'),
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]
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tt.check_pairs(isp.remove_comments, tests)
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def test_get_input_encoding():
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encoding = isp.get_input_encoding()
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nt.assert_true(isinstance(encoding, str))
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# simple-minded check that at least encoding a simple string works with the
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# encoding we got.
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nt.assert_equal(u'test'.encode(encoding), b'test')
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class NoInputEncodingTestCase(unittest.TestCase):
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def setUp(self):
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self.old_stdin = sys.stdin
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class X: pass
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fake_stdin = X()
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sys.stdin = fake_stdin
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def test(self):
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# Verify that if sys.stdin has no 'encoding' attribute we do the right
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# thing
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enc = isp.get_input_encoding()
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self.assertEqual(enc, 'ascii')
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def tearDown(self):
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sys.stdin = self.old_stdin
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class InputSplitterTestCase(unittest.TestCase):
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def setUp(self):
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self.isp = isp.InputSplitter()
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def test_reset(self):
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isp = self.isp
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isp.push('x=1')
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isp.reset()
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self.assertEqual(isp._buffer, [])
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self.assertEqual(isp.get_indent_spaces(), 0)
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self.assertEqual(isp.source, '')
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self.assertEqual(isp.code, None)
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self.assertEqual(isp._is_complete, False)
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def test_source(self):
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self.isp._store('1')
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self.isp._store('2')
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self.assertEqual(self.isp.source, '1\n2\n')
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self.assertEqual(len(self.isp._buffer)>0, True)
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self.assertEqual(self.isp.source_reset(), '1\n2\n')
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self.assertEqual(self.isp._buffer, [])
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self.assertEqual(self.isp.source, '')
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def test_indent(self):
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isp = self.isp # shorthand
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isp.push('x=1')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\n x=1')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('y=2\n')
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self.assertEqual(isp.get_indent_spaces(), 0)
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def test_indent2(self):
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isp = self.isp
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isp.push('if 1:')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push(' x=1')
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self.assertEqual(isp.get_indent_spaces(), 4)
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# Blank lines shouldn't change the indent level
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isp.push(' '*2)
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self.assertEqual(isp.get_indent_spaces(), 4)
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def test_indent3(self):
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isp = self.isp
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# When a multiline statement contains parens or multiline strings, we
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# shouldn't get confused.
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isp.push("if 1:")
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isp.push(" x = (1+\n 2)")
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self.assertEqual(isp.get_indent_spaces(), 4)
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def test_indent4(self):
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isp = self.isp
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# whitespace after ':' should not screw up indent level
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isp.push('if 1: \n x=1')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('y=2\n')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\t\n x=1')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('y=2\n')
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self.assertEqual(isp.get_indent_spaces(), 0)
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def test_dedent_pass(self):
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isp = self.isp # shorthand
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# should NOT cause dedent
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isp.push('if 1:\n passes = 5')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('if 1:\n pass')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\n pass ')
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self.assertEqual(isp.get_indent_spaces(), 0)
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def test_dedent_break(self):
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isp = self.isp # shorthand
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# should NOT cause dedent
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isp.push('while 1:\n breaks = 5')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('while 1:\n break')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('while 1:\n break ')
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self.assertEqual(isp.get_indent_spaces(), 0)
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def test_dedent_continue(self):
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isp = self.isp # shorthand
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# should NOT cause dedent
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isp.push('while 1:\n continues = 5')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('while 1:\n continue')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('while 1:\n continue ')
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self.assertEqual(isp.get_indent_spaces(), 0)
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def test_dedent_raise(self):
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isp = self.isp # shorthand
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# should NOT cause dedent
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isp.push('if 1:\n raised = 4')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('if 1:\n raise TypeError()')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\n raise')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\n raise ')
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self.assertEqual(isp.get_indent_spaces(), 0)
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def test_dedent_return(self):
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isp = self.isp # shorthand
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# should NOT cause dedent
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isp.push('if 1:\n returning = 4')
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self.assertEqual(isp.get_indent_spaces(), 4)
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isp.push('if 1:\n return 5 + 493')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\n return')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\n return ')
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self.assertEqual(isp.get_indent_spaces(), 0)
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isp.push('if 1:\n return(0)')
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self.assertEqual(isp.get_indent_spaces(), 0)
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def test_push(self):
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isp = self.isp
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self.assertEqual(isp.push('x=1'), True)
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def test_push2(self):
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isp = self.isp
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self.assertEqual(isp.push('if 1:'), False)
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for line in [' x=1', '# a comment', ' y=2']:
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print(line)
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self.assertEqual(isp.push(line), True)
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def test_push3(self):
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isp = self.isp
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isp.push('if True:')
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isp.push(' a = 1')
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self.assertEqual(isp.push('b = [1,'), False)
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def test_push_accepts_more(self):
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isp = self.isp
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isp.push('x=1')
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self.assertEqual(isp.push_accepts_more(), False)
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def test_push_accepts_more2(self):
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isp = self.isp
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isp.push('if 1:')
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self.assertEqual(isp.push_accepts_more(), True)
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isp.push(' x=1')
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self.assertEqual(isp.push_accepts_more(), True)
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isp.push('')
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self.assertEqual(isp.push_accepts_more(), False)
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def test_push_accepts_more3(self):
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isp = self.isp
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isp.push("x = (2+\n3)")
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self.assertEqual(isp.push_accepts_more(), False)
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def test_push_accepts_more4(self):
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isp = self.isp
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# When a multiline statement contains parens or multiline strings, we
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# shouldn't get confused.
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# FIXME: we should be able to better handle de-dents in statements like
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# multiline strings and multiline expressions (continued with \ or
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# parens). Right now we aren't handling the indentation tracking quite
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# correctly with this, though in practice it may not be too much of a
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# problem. We'll need to see.
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isp.push("if 1:")
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isp.push(" x = (2+")
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isp.push(" 3)")
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self.assertEqual(isp.push_accepts_more(), True)
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isp.push(" y = 3")
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self.assertEqual(isp.push_accepts_more(), True)
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isp.push('')
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self.assertEqual(isp.push_accepts_more(), False)
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def test_push_accepts_more5(self):
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isp = self.isp
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isp.push('try:')
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isp.push(' a = 5')
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isp.push('except:')
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isp.push(' raise')
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# We want to be able to add an else: block at this point, so it should
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# wait for a blank line.
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self.assertEqual(isp.push_accepts_more(), True)
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def test_continuation(self):
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isp = self.isp
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isp.push("import os, \\")
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self.assertEqual(isp.push_accepts_more(), True)
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isp.push("sys")
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self.assertEqual(isp.push_accepts_more(), False)
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def test_syntax_error(self):
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isp = self.isp
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# Syntax errors immediately produce a 'ready' block, so the invalid
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# Python can be sent to the kernel for evaluation with possible ipython
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# special-syntax conversion.
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isp.push('run foo')
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self.assertEqual(isp.push_accepts_more(), False)
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def test_unicode(self):
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self.isp.push(u"Pérez")
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self.isp.push(u'\xc3\xa9')
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self.isp.push(u"u'\xc3\xa9'")
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def test_line_continuation(self):
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""" Test issue #2108."""
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isp = self.isp
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# A blank line after a line continuation should not accept more
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isp.push("1 \\\n\n")
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self.assertEqual(isp.push_accepts_more(), False)
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# Whitespace after a \ is a SyntaxError. The only way to test that
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# here is to test that push doesn't accept more (as with
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# test_syntax_error() above).
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isp.push(r"1 \ ")
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self.assertEqual(isp.push_accepts_more(), False)
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# Even if the line is continuable (c.f. the regular Python
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# interpreter)
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isp.push(r"(1 \ ")
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self.assertEqual(isp.push_accepts_more(), False)
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def test_check_complete(self):
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isp = self.isp
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self.assertEqual(isp.check_complete("a = 1"), ('complete', None))
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self.assertEqual(isp.check_complete("for a in range(5):"), ('incomplete', 4))
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self.assertEqual(isp.check_complete("raise = 2"), ('invalid', None))
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self.assertEqual(isp.check_complete("a = [1,\n2,"), ('incomplete', 0))
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self.assertEqual(isp.check_complete("def a():\n x=1\n global x"), ('invalid', None))
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class InteractiveLoopTestCase(unittest.TestCase):
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"""Tests for an interactive loop like a python shell.
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"""
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def check_ns(self, lines, ns):
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"""Validate that the given input lines produce the resulting namespace.
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Note: the input lines are given exactly as they would be typed in an
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auto-indenting environment, as mini_interactive_loop above already does
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auto-indenting and prepends spaces to the input.
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"""
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src = mini_interactive_loop(pseudo_input(lines))
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test_ns = {}
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exec(src, test_ns)
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# We can't check that the provided ns is identical to the test_ns,
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# because Python fills test_ns with extra keys (copyright, etc). But
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# we can check that the given dict is *contained* in test_ns
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for k,v in ns.items():
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self.assertEqual(test_ns[k], v)
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def test_simple(self):
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self.check_ns(['x=1'], dict(x=1))
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def test_simple2(self):
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self.check_ns(['if 1:', 'x=2'], dict(x=2))
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def test_xy(self):
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self.check_ns(['x=1; y=2'], dict(x=1, y=2))
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def test_abc(self):
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self.check_ns(['if 1:','a=1','b=2','c=3'], dict(a=1, b=2, c=3))
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def test_multi(self):
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self.check_ns(['x =(1+','1+','2)'], dict(x=4))
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class IPythonInputTestCase(InputSplitterTestCase):
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"""By just creating a new class whose .isp is a different instance, we
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re-run the same test battery on the new input splitter.
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In addition, this runs the tests over the syntax and syntax_ml dicts that
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were tested by individual functions, as part of the OO interface.
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It also makes some checks on the raw buffer storage.
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"""
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def setUp(self):
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self.isp = isp.IPythonInputSplitter()
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def test_syntax(self):
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"""Call all single-line syntax tests from the main object"""
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isp = self.isp
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for example in syntax.values():
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for raw, out_t in example:
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if raw.startswith(' '):
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continue
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isp.push(raw+'\n')
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out_raw = isp.source_raw
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out = isp.source_reset()
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self.assertEqual(out.rstrip(), out_t,
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tt.pair_fail_msg.format("inputsplitter",raw, out_t, out))
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self.assertEqual(out_raw.rstrip(), raw.rstrip())
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def test_syntax_multiline(self):
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isp = self.isp
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for example in syntax_ml.values():
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for line_pairs in example:
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out_t_parts = []
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raw_parts = []
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for lraw, out_t_part in line_pairs:
|
|
|
if out_t_part is not None:
|
|
|
out_t_parts.append(out_t_part)
|
|
|
|
|
|
if lraw is not None:
|
|
|
isp.push(lraw)
|
|
|
raw_parts.append(lraw)
|
|
|
|
|
|
out_raw = isp.source_raw
|
|
|
out = isp.source_reset()
|
|
|
out_t = '\n'.join(out_t_parts).rstrip()
|
|
|
raw = '\n'.join(raw_parts).rstrip()
|
|
|
self.assertEqual(out.rstrip(), out_t)
|
|
|
self.assertEqual(out_raw.rstrip(), raw)
|
|
|
|
|
|
def test_syntax_multiline_cell(self):
|
|
|
isp = self.isp
|
|
|
for example in syntax_ml.values():
|
|
|
|
|
|
out_t_parts = []
|
|
|
for line_pairs in example:
|
|
|
raw = '\n'.join(r for r, _ in line_pairs if r is not None)
|
|
|
out_t = '\n'.join(t for _,t in line_pairs if t is not None)
|
|
|
out = isp.transform_cell(raw)
|
|
|
# Match ignoring trailing whitespace
|
|
|
self.assertEqual(out.rstrip(), out_t.rstrip())
|
|
|
|
|
|
def test_cellmagic_preempt(self):
|
|
|
isp = self.isp
|
|
|
for raw, name, line, cell in [
|
|
|
("%%cellm a\nIn[1]:", u'cellm', u'a', u'In[1]:'),
|
|
|
("%%cellm \nline\n>>> hi", u'cellm', u'', u'line\n>>> hi'),
|
|
|
(">>> %%cellm \nline\n>>> hi", u'cellm', u'', u'line\nhi'),
|
|
|
("%%cellm \n>>> hi", u'cellm', u'', u'>>> hi'),
|
|
|
("%%cellm \nline1\nline2", u'cellm', u'', u'line1\nline2'),
|
|
|
("%%cellm \nline1\\\\\nline2", u'cellm', u'', u'line1\\\\\nline2'),
|
|
|
]:
|
|
|
expected = "get_ipython().run_cell_magic(%r, %r, %r)" % (
|
|
|
name, line, cell
|
|
|
)
|
|
|
out = isp.transform_cell(raw)
|
|
|
self.assertEqual(out.rstrip(), expected.rstrip())
|
|
|
|
|
|
def test_multiline_passthrough(self):
|
|
|
isp = self.isp
|
|
|
class CommentTransformer(InputTransformer):
|
|
|
def __init__(self):
|
|
|
self._lines = []
|
|
|
|
|
|
def push(self, line):
|
|
|
self._lines.append(line + '#')
|
|
|
|
|
|
def reset(self):
|
|
|
text = '\n'.join(self._lines)
|
|
|
self._lines = []
|
|
|
return text
|
|
|
|
|
|
isp.physical_line_transforms.insert(0, CommentTransformer())
|
|
|
|
|
|
for raw, expected in [
|
|
|
("a=5", "a=5#"),
|
|
|
("%ls foo", "get_ipython().run_line_magic(%r, %r)" % (u'ls', u'foo#')),
|
|
|
("!ls foo\n%ls bar", "get_ipython().system(%r)\nget_ipython().run_line_magic(%r, %r)" % (
|
|
|
u'ls foo#', u'ls', u'bar#'
|
|
|
)),
|
|
|
("1\n2\n3\n%ls foo\n4\n5", "1#\n2#\n3#\nget_ipython().run_line_magic(%r, %r)\n4#\n5#" % (u'ls', u'foo#')),
|
|
|
]:
|
|
|
out = isp.transform_cell(raw)
|
|
|
self.assertEqual(out.rstrip(), expected.rstrip())
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Main - use as a script, mostly for developer experiments
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
# A simple demo for interactive experimentation. This code will not get
|
|
|
# picked up by any test suite.
|
|
|
from IPython.core.inputsplitter import IPythonInputSplitter
|
|
|
|
|
|
# configure here the syntax to use, prompt and whether to autoindent
|
|
|
#isp, start_prompt = InputSplitter(), '>>> '
|
|
|
isp, start_prompt = IPythonInputSplitter(), 'In> '
|
|
|
|
|
|
autoindent = True
|
|
|
#autoindent = False
|
|
|
|
|
|
try:
|
|
|
while True:
|
|
|
prompt = start_prompt
|
|
|
while isp.push_accepts_more():
|
|
|
indent = ' '*isp.get_indent_spaces()
|
|
|
if autoindent:
|
|
|
line = indent + input(prompt+indent)
|
|
|
else:
|
|
|
line = input(prompt)
|
|
|
isp.push(line)
|
|
|
prompt = '... '
|
|
|
|
|
|
# Here we just return input so we can use it in a test suite, but a
|
|
|
# real interpreter would instead send it for execution somewhere.
|
|
|
#src = isp.source; raise EOFError # dbg
|
|
|
raw = isp.source_raw
|
|
|
src = isp.source_reset()
|
|
|
print('Input source was:\n', src)
|
|
|
print('Raw source was:\n', raw)
|
|
|
except EOFError:
|
|
|
print('Bye')
|
|
|
|
|
|
# Tests for cell magics support
|
|
|
|
|
|
def test_last_blank():
|
|
|
nt.assert_false(isp.last_blank(''))
|
|
|
nt.assert_false(isp.last_blank('abc'))
|
|
|
nt.assert_false(isp.last_blank('abc\n'))
|
|
|
nt.assert_false(isp.last_blank('abc\na'))
|
|
|
|
|
|
nt.assert_true(isp.last_blank('\n'))
|
|
|
nt.assert_true(isp.last_blank('\n '))
|
|
|
nt.assert_true(isp.last_blank('abc\n '))
|
|
|
nt.assert_true(isp.last_blank('abc\n\n'))
|
|
|
nt.assert_true(isp.last_blank('abc\nd\n\n'))
|
|
|
nt.assert_true(isp.last_blank('abc\nd\ne\n\n'))
|
|
|
nt.assert_true(isp.last_blank('abc \n \n \n\n'))
|
|
|
|
|
|
|
|
|
def test_last_two_blanks():
|
|
|
nt.assert_false(isp.last_two_blanks(''))
|
|
|
nt.assert_false(isp.last_two_blanks('abc'))
|
|
|
nt.assert_false(isp.last_two_blanks('abc\n'))
|
|
|
nt.assert_false(isp.last_two_blanks('abc\n\na'))
|
|
|
nt.assert_false(isp.last_two_blanks('abc\n \n'))
|
|
|
nt.assert_false(isp.last_two_blanks('abc\n\n'))
|
|
|
|
|
|
nt.assert_true(isp.last_two_blanks('\n\n'))
|
|
|
nt.assert_true(isp.last_two_blanks('\n\n '))
|
|
|
nt.assert_true(isp.last_two_blanks('\n \n'))
|
|
|
nt.assert_true(isp.last_two_blanks('abc\n\n '))
|
|
|
nt.assert_true(isp.last_two_blanks('abc\n\n\n'))
|
|
|
nt.assert_true(isp.last_two_blanks('abc\n\n \n'))
|
|
|
nt.assert_true(isp.last_two_blanks('abc\n\n \n '))
|
|
|
nt.assert_true(isp.last_two_blanks('abc\n\n \n \n'))
|
|
|
nt.assert_true(isp.last_two_blanks('abc\nd\n\n\n'))
|
|
|
nt.assert_true(isp.last_two_blanks('abc\nd\ne\nf\n\n\n'))
|
|
|
|
|
|
|
|
|
class CellMagicsCommon(object):
|
|
|
|
|
|
def test_whole_cell(self):
|
|
|
src = "%%cellm line\nbody\n"
|
|
|
out = self.sp.transform_cell(src)
|
|
|
ref = "get_ipython().run_cell_magic('cellm', 'line', 'body')\n"
|
|
|
nt.assert_equal(out, ref)
|
|
|
|
|
|
def test_cellmagic_help(self):
|
|
|
self.sp.push('%%cellm?')
|
|
|
nt.assert_false(self.sp.push_accepts_more())
|
|
|
|
|
|
def tearDown(self):
|
|
|
self.sp.reset()
|
|
|
|
|
|
|
|
|
class CellModeCellMagics(CellMagicsCommon, unittest.TestCase):
|
|
|
sp = isp.IPythonInputSplitter(line_input_checker=False)
|
|
|
|
|
|
def test_incremental(self):
|
|
|
sp = self.sp
|
|
|
sp.push('%%cellm firstline\n')
|
|
|
nt.assert_true(sp.push_accepts_more()) #1
|
|
|
sp.push('line2\n')
|
|
|
nt.assert_true(sp.push_accepts_more()) #2
|
|
|
sp.push('\n')
|
|
|
# This should accept a blank line and carry on until the cell is reset
|
|
|
nt.assert_true(sp.push_accepts_more()) #3
|
|
|
|
|
|
def test_no_strip_coding(self):
|
|
|
src = '\n'.join([
|
|
|
'%%writefile foo.py',
|
|
|
'# coding: utf-8',
|
|
|
'print(u"üñîçø∂é")',
|
|
|
])
|
|
|
out = self.sp.transform_cell(src)
|
|
|
nt.assert_in('# coding: utf-8', out)
|
|
|
|
|
|
|
|
|
class LineModeCellMagics(CellMagicsCommon, unittest.TestCase):
|
|
|
sp = isp.IPythonInputSplitter(line_input_checker=True)
|
|
|
|
|
|
def test_incremental(self):
|
|
|
sp = self.sp
|
|
|
sp.push('%%cellm line2\n')
|
|
|
nt.assert_true(sp.push_accepts_more()) #1
|
|
|
sp.push('\n')
|
|
|
# In this case, a blank line should end the cell magic
|
|
|
nt.assert_false(sp.push_accepts_more()) #2
|
|
|
|
|
|
indentation_samples = [
|
|
|
('a = 1', 0),
|
|
|
('for a in b:', 4),
|
|
|
('def f():', 4),
|
|
|
('def f(): #comment', 4),
|
|
|
('a = ":#not a comment"', 0),
|
|
|
('def f():\n a = 1', 4),
|
|
|
('def f():\n return 1', 0),
|
|
|
('for a in b:\n'
|
|
|
' if a < 0:'
|
|
|
' continue', 3),
|
|
|
('a = {', 4),
|
|
|
('a = {\n'
|
|
|
' 1,', 5),
|
|
|
('b = """123', 0),
|
|
|
('', 0),
|
|
|
('def f():\n pass', 0),
|
|
|
('class Bar:\n def f():\n pass', 4),
|
|
|
('class Bar:\n def f():\n raise', 4),
|
|
|
]
|
|
|
|
|
|
def test_find_next_indent():
|
|
|
for code, exp in indentation_samples:
|
|
|
res = isp.find_next_indent(code)
|
|
|
msg = "{!r} != {!r} (expected)\n Code: {!r}".format(res, exp, code)
|
|
|
assert res == exp, msg
|
|
|
|
