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"""Tests for the inputsplitter module.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2010 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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# Third party
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import nose.tools as nt
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# Our own
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from IPython.core import inputsplitter as isp
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#-----------------------------------------------------------------------------
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# Semi-complete examples (also used as tests)
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#-----------------------------------------------------------------------------
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def mini_interactive_loop(raw_input):
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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.indent_spaces
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prompt = '>>> ' + indent
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line = indent + raw_input(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
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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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for s, nsp in tests:
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nt.assert_equal(isp.num_ini_spaces(s), nsp)
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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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for inp, out in tests:
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nt.assert_equal(isp.remove_comments(inp), out)
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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, basestring))
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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('test'.encode(encoding), 'test')
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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.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.assertTrue(len(self.isp._buffer)>0)
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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.indent_spaces, 0)
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isp.push('if 1:\n x=1')
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self.assertEqual(isp.indent_spaces, 4)
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isp.push('y=2\n')
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self.assertEqual(isp.indent_spaces, 0)
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isp.push('if 1:')
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self.assertEqual(isp.indent_spaces, 4)
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isp.push(' x=1')
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self.assertEqual(isp.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.indent_spaces, 4)
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def test_indent2(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.indent_spaces, 4)
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def test_dedent(self):
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isp = self.isp # shorthand
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isp.push('if 1:')
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self.assertEqual(isp.indent_spaces, 4)
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isp.push(' pass')
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self.assertEqual(isp.indent_spaces, 0)
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def test_push(self):
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isp = self.isp
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self.assertTrue(isp.push('x=1'))
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def test_push2(self):
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isp = self.isp
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self.assertFalse(isp.push('if 1:'))
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for line in [' x=1', '# a comment', ' y=2']:
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self.assertTrue(isp.push(line))
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def test_push3(self):
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"""Test input with leading whitespace"""
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isp = self.isp
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isp.push(' x=1')
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isp.push(' y=2')
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self.assertEqual(isp.source, 'if 1:\n x=1\n y=2\n')
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def test_replace_mode(self):
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isp = self.isp
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isp.input_mode = 'replace'
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isp.push('x=1')
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self.assertEqual(isp.source, 'x=1\n')
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isp.push('x=2')
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self.assertEqual(isp.source, 'x=2\n')
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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.assertFalse(isp.push_accepts_more())
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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.assertTrue(isp.push_accepts_more())
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isp.push(' x=1')
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self.assertTrue(isp.push_accepts_more())
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isp.push('')
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self.assertFalse(isp.push_accepts_more())
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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.assertFalse(isp.push_accepts_more())
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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.assertTrue(isp.push_accepts_more())
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isp.push(" y = 3")
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self.assertTrue(isp.push_accepts_more())
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isp.push('')
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self.assertFalse(isp.push_accepts_more())
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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.assertFalse(isp.push_accepts_more())
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def check_split(self, block_lines, compile=True):
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blocks = assemble(block_lines)
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lines = ''.join(blocks)
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oblock = self.isp.split_blocks(lines)
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self.assertEqual(oblock, blocks)
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if compile:
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for block in blocks:
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self.isp._compile(block)
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def test_split(self):
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# All blocks of input we want to test in a list. The format for each
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# block is a list of lists, with each inner lists consisting of all the
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# lines (as single-lines) that should make up a sub-block.
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# Note: do NOT put here sub-blocks that don't compile, as the
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# check_split() routine makes a final verification pass to check that
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# each sub_block, as returned by split_blocks(), does compile
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# correctly.
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all_blocks = [ [['x=1']],
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[['x=1'],
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['y=2']],
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[['x=1'],
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['# a comment'],
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['y=11']],
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[['if 1:',
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' x=1'],
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['y=3']],
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[['def f(x):',
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' return x'],
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['x=1']],
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[['def f(x):',
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' x+=1',
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' ',
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' return x'],
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['x=1']],
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[['def f(x):',
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' if x>0:',
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' y=1',
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' # a comment',
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' else:',
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' y=4',
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' ',
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' return y'],
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['x=1'],
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['if 1:',
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' y=11'] ],
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[['for i in range(10):'
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' x=i**2']],
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[['for i in range(10):'
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' x=i**2'],
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['z = 1']],
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]
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for block_lines in all_blocks:
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self.check_split(block_lines)
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def test_split_syntax_errors(self):
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# Block splitting with invalid syntax
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all_blocks = [ [['a syntax error']],
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[['x=1'],
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['a syntax error']],
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[['for i in range(10):'
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' an error']],
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]
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for block_lines in all_blocks:
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self.check_split(block_lines, compile=False)
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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 in 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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