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"""Tests for tokenutil"""
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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 nose.tools as nt
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from IPython.utils.tokenutil import token_at_cursor, line_at_cursor
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def expect_token(expected, cell, cursor_pos):
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token = token_at_cursor(cell, cursor_pos)
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offset = 0
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for line in cell.splitlines():
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if offset + len(line) >= cursor_pos:
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break
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else:
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offset += len(line)
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column = cursor_pos - offset
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line_with_cursor = '%s|%s' % (line[:column], line[column:])
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nt.assert_equal(token, expected,
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"Expected %r, got %r in: %r (pos %i)" % (
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expected, token, line_with_cursor, cursor_pos)
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)
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def test_simple():
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cell = "foo"
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for i in range(len(cell)):
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expect_token("foo", cell, i)
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def test_function():
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cell = "foo(a=5, b='10')"
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expected = 'foo'
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# up to `foo(|a=`
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for i in range(cell.find('a=') + 1):
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expect_token("foo", cell, i)
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# find foo after `=`
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for i in [cell.find('=') + 1, cell.rfind('=') + 1]:
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expect_token("foo", cell, i)
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# in between `5,|` and `|b=`
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for i in range(cell.find(','), cell.find('b=')):
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expect_token("foo", cell, i)
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def test_multiline():
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cell = '\n'.join([
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'a = 5',
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'b = hello("string", there)'
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])
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expected = 'hello'
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start = cell.index(expected) + 1
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for i in range(start, start + len(expected)):
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expect_token(expected, cell, i)
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expected = 'hello'
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start = cell.index(expected) + 1
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for i in range(start, start + len(expected)):
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expect_token(expected, cell, i)
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def test_nested_call():
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cell = "foo(bar(a=5), b=10)"
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expected = 'foo'
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start = cell.index('bar') + 1
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for i in range(start, start + 3):
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expect_token(expected, cell, i)
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expected = 'bar'
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start = cell.index('a=')
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for i in range(start, start + 3):
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expect_token(expected, cell, i)
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expected = 'foo'
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start = cell.index(')') + 1
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for i in range(start, len(cell)-1):
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expect_token(expected, cell, i)
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def test_attrs():
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cell = "a = obj.attr.subattr"
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expected = 'obj'
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idx = cell.find('obj') + 1
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for i in range(idx, idx + 3):
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expect_token(expected, cell, i)
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idx = cell.find('.attr') + 2
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expected = 'obj.attr'
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for i in range(idx, idx + 4):
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expect_token(expected, cell, i)
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idx = cell.find('.subattr') + 2
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expected = 'obj.attr.subattr'
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for i in range(idx, len(cell)):
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expect_token(expected, cell, i)
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def test_line_at_cursor():
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cell = ""
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(line, offset) = line_at_cursor(cell, cursor_pos=11)
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assert line == "", ("Expected '', got %r" % line)
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assert offset == 0, ("Expected '', got %r" % line)
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