1009 lines
39 KiB
Python
1009 lines
39 KiB
Python
#
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# Test suite for the textwrap module.
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#
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# Original tests written by Greg Ward <gward@python.net>.
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# Converted to PyUnit by Peter Hansen <peter@engcorp.com>.
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# Currently maintained by Greg Ward.
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#
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# $Id$
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#
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import unittest
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from textwrap import TextWrapper, wrap, fill, dedent, indent, shorten
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class BaseTestCase(unittest.TestCase):
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'''Parent class with utility methods for textwrap tests.'''
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def show(self, textin):
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if isinstance(textin, list):
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result = []
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for i in range(len(textin)):
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result.append(" %d: %r" % (i, textin[i]))
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result = "\n".join(result) if result else " no lines"
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elif isinstance(textin, str):
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result = " %s\n" % repr(textin)
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return result
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def check(self, result, expect):
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self.assertEqual(result, expect,
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'expected:\n%s\nbut got:\n%s' % (
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self.show(expect), self.show(result)))
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def check_wrap(self, text, width, expect, **kwargs):
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result = wrap(text, width, **kwargs)
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self.check(result, expect)
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def check_split(self, text, expect):
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result = self.wrapper._split(text)
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self.assertEqual(result, expect,
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"\nexpected %r\n"
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"but got %r" % (expect, result))
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class WrapTestCase(BaseTestCase):
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def setUp(self):
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self.wrapper = TextWrapper(width=45)
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def test_simple(self):
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# Simple case: just words, spaces, and a bit of punctuation
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text = "Hello there, how are you this fine day? I'm glad to hear it!"
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self.check_wrap(text, 12,
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["Hello there,",
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"how are you",
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"this fine",
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"day? I'm",
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"glad to hear",
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"it!"])
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self.check_wrap(text, 42,
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["Hello there, how are you this fine day?",
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"I'm glad to hear it!"])
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self.check_wrap(text, 80, [text])
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def test_empty_string(self):
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# Check that wrapping the empty string returns an empty list.
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self.check_wrap("", 6, [])
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self.check_wrap("", 6, [], drop_whitespace=False)
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def test_empty_string_with_initial_indent(self):
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# Check that the empty string is not indented.
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self.check_wrap("", 6, [], initial_indent="++")
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self.check_wrap("", 6, [], initial_indent="++", drop_whitespace=False)
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def test_whitespace(self):
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# Whitespace munging and end-of-sentence detection
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text = """\
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This is a paragraph that already has
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line breaks. But some of its lines are much longer than the others,
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so it needs to be wrapped.
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Some lines are \ttabbed too.
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What a mess!
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"""
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expect = ["This is a paragraph that already has line",
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"breaks. But some of its lines are much",
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"longer than the others, so it needs to be",
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"wrapped. Some lines are tabbed too. What a",
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"mess!"]
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wrapper = TextWrapper(45, fix_sentence_endings=True)
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result = wrapper.wrap(text)
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self.check(result, expect)
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result = wrapper.fill(text)
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self.check(result, '\n'.join(expect))
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text = "\tTest\tdefault\t\ttabsize."
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expect = [" Test default tabsize."]
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self.check_wrap(text, 80, expect)
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text = "\tTest\tcustom\t\ttabsize."
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expect = [" Test custom tabsize."]
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self.check_wrap(text, 80, expect, tabsize=4)
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def test_fix_sentence_endings(self):
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wrapper = TextWrapper(60, fix_sentence_endings=True)
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# SF #847346: ensure that fix_sentence_endings=True does the
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# right thing even on input short enough that it doesn't need to
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# be wrapped.
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text = "A short line. Note the single space."
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expect = ["A short line. Note the single space."]
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self.check(wrapper.wrap(text), expect)
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# Test some of the hairy end cases that _fix_sentence_endings()
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# is supposed to handle (the easy stuff is tested in
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# test_whitespace() above).
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text = "Well, Doctor? What do you think?"
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expect = ["Well, Doctor? What do you think?"]
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self.check(wrapper.wrap(text), expect)
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text = "Well, Doctor?\nWhat do you think?"
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self.check(wrapper.wrap(text), expect)
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text = 'I say, chaps! Anyone for "tennis?"\nHmmph!'
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expect = ['I say, chaps! Anyone for "tennis?" Hmmph!']
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self.check(wrapper.wrap(text), expect)
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wrapper.width = 20
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expect = ['I say, chaps!', 'Anyone for "tennis?"', 'Hmmph!']
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self.check(wrapper.wrap(text), expect)
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text = 'And she said, "Go to hell!"\nCan you believe that?'
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expect = ['And she said, "Go to',
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'hell!" Can you',
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'believe that?']
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self.check(wrapper.wrap(text), expect)
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wrapper.width = 60
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expect = ['And she said, "Go to hell!" Can you believe that?']
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self.check(wrapper.wrap(text), expect)
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text = 'File stdio.h is nice.'
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expect = ['File stdio.h is nice.']
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self.check(wrapper.wrap(text), expect)
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def test_wrap_short(self):
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# Wrapping to make short lines longer
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text = "This is a\nshort paragraph."
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self.check_wrap(text, 20, ["This is a short",
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"paragraph."])
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self.check_wrap(text, 40, ["This is a short paragraph."])
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def test_wrap_short_1line(self):
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# Test endcases
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text = "This is a short line."
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self.check_wrap(text, 30, ["This is a short line."])
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self.check_wrap(text, 30, ["(1) This is a short line."],
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initial_indent="(1) ")
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def test_hyphenated(self):
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# Test breaking hyphenated words
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text = ("this-is-a-useful-feature-for-"
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"reformatting-posts-from-tim-peters'ly")
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self.check_wrap(text, 40,
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["this-is-a-useful-feature-for-",
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"reformatting-posts-from-tim-peters'ly"])
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self.check_wrap(text, 41,
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["this-is-a-useful-feature-for-",
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"reformatting-posts-from-tim-peters'ly"])
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self.check_wrap(text, 42,
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["this-is-a-useful-feature-for-reformatting-",
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"posts-from-tim-peters'ly"])
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# The test tests current behavior but is not testing parts of the API.
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expect = ("this-|is-|a-|useful-|feature-|for-|"
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"reformatting-|posts-|from-|tim-|peters'ly").split('|')
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self.check_wrap(text, 1, expect, break_long_words=False)
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self.check_split(text, expect)
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self.check_split('e-mail', ['e-mail'])
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self.check_split('Jelly-O', ['Jelly-O'])
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# The test tests current behavior but is not testing parts of the API.
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self.check_split('half-a-crown', 'half-|a-|crown'.split('|'))
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def test_hyphenated_numbers(self):
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# Test that hyphenated numbers (eg. dates) are not broken like words.
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text = ("Python 1.0.0 was released on 1994-01-26. Python 1.0.1 was\n"
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"released on 1994-02-15.")
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self.check_wrap(text, 30, ['Python 1.0.0 was released on',
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'1994-01-26. Python 1.0.1 was',
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'released on 1994-02-15.'])
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self.check_wrap(text, 40, ['Python 1.0.0 was released on 1994-01-26.',
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'Python 1.0.1 was released on 1994-02-15.'])
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self.check_wrap(text, 1, text.split(), break_long_words=False)
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text = "I do all my shopping at 7-11."
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self.check_wrap(text, 25, ["I do all my shopping at",
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"7-11."])
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self.check_wrap(text, 27, ["I do all my shopping at",
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"7-11."])
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self.check_wrap(text, 29, ["I do all my shopping at 7-11."])
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self.check_wrap(text, 1, text.split(), break_long_words=False)
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def test_em_dash(self):
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# Test text with em-dashes
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text = "Em-dashes should be written -- thus."
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self.check_wrap(text, 25,
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["Em-dashes should be",
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"written -- thus."])
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# Probe the boundaries of the properly written em-dash,
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# ie. " -- ".
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self.check_wrap(text, 29,
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["Em-dashes should be written",
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"-- thus."])
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expect = ["Em-dashes should be written --",
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"thus."]
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self.check_wrap(text, 30, expect)
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self.check_wrap(text, 35, expect)
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self.check_wrap(text, 36,
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["Em-dashes should be written -- thus."])
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# The improperly written em-dash is handled too, because
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# it's adjacent to non-whitespace on both sides.
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text = "You can also do--this or even---this."
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expect = ["You can also do",
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"--this or even",
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"---this."]
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self.check_wrap(text, 15, expect)
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self.check_wrap(text, 16, expect)
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expect = ["You can also do--",
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"this or even---",
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"this."]
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self.check_wrap(text, 17, expect)
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self.check_wrap(text, 19, expect)
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expect = ["You can also do--this or even",
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"---this."]
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self.check_wrap(text, 29, expect)
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self.check_wrap(text, 31, expect)
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expect = ["You can also do--this or even---",
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"this."]
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self.check_wrap(text, 32, expect)
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self.check_wrap(text, 35, expect)
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# All of the above behaviour could be deduced by probing the
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# _split() method.
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text = "Here's an -- em-dash and--here's another---and another!"
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expect = ["Here's", " ", "an", " ", "--", " ", "em-", "dash", " ",
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"and", "--", "here's", " ", "another", "---",
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"and", " ", "another!"]
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self.check_split(text, expect)
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text = "and then--bam!--he was gone"
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expect = ["and", " ", "then", "--", "bam!", "--",
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"he", " ", "was", " ", "gone"]
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self.check_split(text, expect)
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def test_unix_options (self):
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# Test that Unix-style command-line options are wrapped correctly.
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# Both Optik (OptionParser) and Docutils rely on this behaviour!
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text = "You should use the -n option, or --dry-run in its long form."
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self.check_wrap(text, 20,
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["You should use the",
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"-n option, or --dry-",
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"run in its long",
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"form."])
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self.check_wrap(text, 21,
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["You should use the -n",
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"option, or --dry-run",
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"in its long form."])
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expect = ["You should use the -n option, or",
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"--dry-run in its long form."]
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self.check_wrap(text, 32, expect)
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self.check_wrap(text, 34, expect)
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self.check_wrap(text, 35, expect)
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self.check_wrap(text, 38, expect)
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expect = ["You should use the -n option, or --dry-",
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"run in its long form."]
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self.check_wrap(text, 39, expect)
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self.check_wrap(text, 41, expect)
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expect = ["You should use the -n option, or --dry-run",
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"in its long form."]
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self.check_wrap(text, 42, expect)
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# Again, all of the above can be deduced from _split().
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text = "the -n option, or --dry-run or --dryrun"
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expect = ["the", " ", "-n", " ", "option,", " ", "or", " ",
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"--dry-", "run", " ", "or", " ", "--dryrun"]
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self.check_split(text, expect)
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def test_funky_hyphens (self):
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# Screwy edge cases cooked up by David Goodger. All reported
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# in SF bug #596434.
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self.check_split("what the--hey!", ["what", " ", "the", "--", "hey!"])
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self.check_split("what the--", ["what", " ", "the--"])
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self.check_split("what the--.", ["what", " ", "the--."])
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self.check_split("--text--.", ["--text--."])
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# When I first read bug #596434, this is what I thought David
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# was talking about. I was wrong; these have always worked
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# fine. The real problem is tested in test_funky_parens()
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# below...
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self.check_split("--option", ["--option"])
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self.check_split("--option-opt", ["--option-", "opt"])
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self.check_split("foo --option-opt bar",
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["foo", " ", "--option-", "opt", " ", "bar"])
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def test_punct_hyphens(self):
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# Oh bother, SF #965425 found another problem with hyphens --
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# hyphenated words in single quotes weren't handled correctly.
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# In fact, the bug is that *any* punctuation around a hyphenated
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# word was handled incorrectly, except for a leading "--", which
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# was special-cased for Optik and Docutils. So test a variety
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# of styles of punctuation around a hyphenated word.
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# (Actually this is based on an Optik bug report, #813077).
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self.check_split("the 'wibble-wobble' widget",
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['the', ' ', "'wibble-", "wobble'", ' ', 'widget'])
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self.check_split('the "wibble-wobble" widget',
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['the', ' ', '"wibble-', 'wobble"', ' ', 'widget'])
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self.check_split("the (wibble-wobble) widget",
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['the', ' ', "(wibble-", "wobble)", ' ', 'widget'])
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self.check_split("the ['wibble-wobble'] widget",
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['the', ' ', "['wibble-", "wobble']", ' ', 'widget'])
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# The test tests current behavior but is not testing parts of the API.
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self.check_split("what-d'you-call-it.",
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"what-d'you-|call-|it.".split('|'))
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def test_funky_parens (self):
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# Second part of SF bug #596434: long option strings inside
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# parentheses.
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self.check_split("foo (--option) bar",
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["foo", " ", "(--option)", " ", "bar"])
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# Related stuff -- make sure parens work in simpler contexts.
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self.check_split("foo (bar) baz",
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["foo", " ", "(bar)", " ", "baz"])
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self.check_split("blah (ding dong), wubba",
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["blah", " ", "(ding", " ", "dong),",
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" ", "wubba"])
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def test_drop_whitespace_false(self):
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# Check that drop_whitespace=False preserves whitespace.
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# SF patch #1581073
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text = " This is a sentence with much whitespace."
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self.check_wrap(text, 10,
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[" This is a", " ", "sentence ",
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"with ", "much white", "space."],
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drop_whitespace=False)
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def test_drop_whitespace_false_whitespace_only(self):
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# Check that drop_whitespace=False preserves a whitespace-only string.
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self.check_wrap(" ", 6, [" "], drop_whitespace=False)
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def test_drop_whitespace_false_whitespace_only_with_indent(self):
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# Check that a whitespace-only string gets indented (when
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# drop_whitespace is False).
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self.check_wrap(" ", 6, [" "], drop_whitespace=False,
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initial_indent=" ")
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def test_drop_whitespace_whitespace_only(self):
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# Check drop_whitespace on a whitespace-only string.
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self.check_wrap(" ", 6, [])
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def test_drop_whitespace_leading_whitespace(self):
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# Check that drop_whitespace does not drop leading whitespace (if
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# followed by non-whitespace).
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# SF bug #622849 reported inconsistent handling of leading
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# whitespace; let's test that a bit, shall we?
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text = " This is a sentence with leading whitespace."
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self.check_wrap(text, 50,
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[" This is a sentence with leading whitespace."])
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self.check_wrap(text, 30,
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[" This is a sentence with", "leading whitespace."])
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def test_drop_whitespace_whitespace_line(self):
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# Check that drop_whitespace skips the whole line if a non-leading
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# line consists only of whitespace.
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text = "abcd efgh"
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# Include the result for drop_whitespace=False for comparison.
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self.check_wrap(text, 6, ["abcd", " ", "efgh"],
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drop_whitespace=False)
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self.check_wrap(text, 6, ["abcd", "efgh"])
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def test_drop_whitespace_whitespace_only_with_indent(self):
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# Check that initial_indent is not applied to a whitespace-only
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# string. This checks a special case of the fact that dropping
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# whitespace occurs before indenting.
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self.check_wrap(" ", 6, [], initial_indent="++")
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def test_drop_whitespace_whitespace_indent(self):
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# Check that drop_whitespace does not drop whitespace indents.
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# This checks a special case of the fact that dropping whitespace
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# occurs before indenting.
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self.check_wrap("abcd efgh", 6, [" abcd", " efgh"],
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initial_indent=" ", subsequent_indent=" ")
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def test_split(self):
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# Ensure that the standard _split() method works as advertised
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# in the comments
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text = "Hello there -- you goof-ball, use the -b option!"
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result = self.wrapper._split(text)
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self.check(result,
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["Hello", " ", "there", " ", "--", " ", "you", " ", "goof-",
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"ball,", " ", "use", " ", "the", " ", "-b", " ", "option!"])
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def test_break_on_hyphens(self):
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# Ensure that the break_on_hyphens attributes work
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text = "yaba daba-doo"
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self.check_wrap(text, 10, ["yaba daba-", "doo"],
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break_on_hyphens=True)
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self.check_wrap(text, 10, ["yaba", "daba-doo"],
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break_on_hyphens=False)
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def test_bad_width(self):
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# Ensure that width <= 0 is caught.
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text = "Whatever, it doesn't matter."
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self.assertRaises(ValueError, wrap, text, 0)
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self.assertRaises(ValueError, wrap, text, -1)
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def test_no_split_at_umlaut(self):
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text = "Die Empf\xe4nger-Auswahl"
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self.check_wrap(text, 13, ["Die", "Empf\xe4nger-", "Auswahl"])
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def test_umlaut_followed_by_dash(self):
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text = "aa \xe4\xe4-\xe4\xe4"
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self.check_wrap(text, 7, ["aa \xe4\xe4-", "\xe4\xe4"])
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def test_non_breaking_space(self):
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text = 'This is a sentence with non-breaking\N{NO-BREAK SPACE}space.'
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self.check_wrap(text, 20,
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['This is a sentence',
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'with non-',
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'breaking\N{NO-BREAK SPACE}space.'],
|
|
break_on_hyphens=True)
|
|
|
|
self.check_wrap(text, 20,
|
|
['This is a sentence',
|
|
'with',
|
|
'non-breaking\N{NO-BREAK SPACE}space.'],
|
|
break_on_hyphens=False)
|
|
|
|
def test_narrow_non_breaking_space(self):
|
|
text = ('This is a sentence with non-breaking'
|
|
'\N{NARROW NO-BREAK SPACE}space.')
|
|
|
|
self.check_wrap(text, 20,
|
|
['This is a sentence',
|
|
'with non-',
|
|
'breaking\N{NARROW NO-BREAK SPACE}space.'],
|
|
break_on_hyphens=True)
|
|
|
|
self.check_wrap(text, 20,
|
|
['This is a sentence',
|
|
'with',
|
|
'non-breaking\N{NARROW NO-BREAK SPACE}space.'],
|
|
break_on_hyphens=False)
|
|
|
|
|
|
class MaxLinesTestCase(BaseTestCase):
|
|
text = "Hello there, how are you this fine day? I'm glad to hear it!"
|
|
|
|
def test_simple(self):
|
|
self.check_wrap(self.text, 12,
|
|
["Hello [...]"],
|
|
max_lines=0)
|
|
self.check_wrap(self.text, 12,
|
|
["Hello [...]"],
|
|
max_lines=1)
|
|
self.check_wrap(self.text, 12,
|
|
["Hello there,",
|
|
"how [...]"],
|
|
max_lines=2)
|
|
self.check_wrap(self.text, 13,
|
|
["Hello there,",
|
|
"how are [...]"],
|
|
max_lines=2)
|
|
self.check_wrap(self.text, 80, [self.text], max_lines=1)
|
|
self.check_wrap(self.text, 12,
|
|
["Hello there,",
|
|
"how are you",
|
|
"this fine",
|
|
"day? I'm",
|
|
"glad to hear",
|
|
"it!"],
|
|
max_lines=6)
|
|
|
|
def test_spaces(self):
|
|
# strip spaces before placeholder
|
|
self.check_wrap(self.text, 12,
|
|
["Hello there,",
|
|
"how are you",
|
|
"this fine",
|
|
"day? [...]"],
|
|
max_lines=4)
|
|
# placeholder at the start of line
|
|
self.check_wrap(self.text, 6,
|
|
["Hello",
|
|
"[...]"],
|
|
max_lines=2)
|
|
# final spaces
|
|
self.check_wrap(self.text + ' ' * 10, 12,
|
|
["Hello there,",
|
|
"how are you",
|
|
"this fine",
|
|
"day? I'm",
|
|
"glad to hear",
|
|
"it!"],
|
|
max_lines=6)
|
|
|
|
def test_placeholder(self):
|
|
self.check_wrap(self.text, 12,
|
|
["Hello..."],
|
|
max_lines=1,
|
|
placeholder='...')
|
|
self.check_wrap(self.text, 12,
|
|
["Hello there,",
|
|
"how are..."],
|
|
max_lines=2,
|
|
placeholder='...')
|
|
# long placeholder and indentation
|
|
with self.assertRaises(ValueError):
|
|
wrap(self.text, 16, initial_indent=' ',
|
|
max_lines=1, placeholder=' [truncated]...')
|
|
with self.assertRaises(ValueError):
|
|
wrap(self.text, 16, subsequent_indent=' ',
|
|
max_lines=2, placeholder=' [truncated]...')
|
|
self.check_wrap(self.text, 16,
|
|
[" Hello there,",
|
|
" [truncated]..."],
|
|
max_lines=2,
|
|
initial_indent=' ',
|
|
subsequent_indent=' ',
|
|
placeholder=' [truncated]...')
|
|
self.check_wrap(self.text, 16,
|
|
[" [truncated]..."],
|
|
max_lines=1,
|
|
initial_indent=' ',
|
|
subsequent_indent=' ',
|
|
placeholder=' [truncated]...')
|
|
self.check_wrap(self.text, 80, [self.text], placeholder='.' * 1000)
|
|
|
|
def test_placeholder_backtrack(self):
|
|
# Test special case when max_lines insufficient, but what
|
|
# would be last wrapped line so long the placeholder cannot
|
|
# be added there without violence. So, textwrap backtracks,
|
|
# adding placeholder to the penultimate line.
|
|
text = 'Good grief Python features are advancing quickly!'
|
|
self.check_wrap(text, 12,
|
|
['Good grief', 'Python*****'],
|
|
max_lines=3,
|
|
placeholder='*****')
|
|
|
|
|
|
class LongWordTestCase (BaseTestCase):
|
|
def setUp(self):
|
|
self.wrapper = TextWrapper()
|
|
self.text = '''\
|
|
Did you say "supercalifragilisticexpialidocious?"
|
|
How *do* you spell that odd word, anyways?
|
|
'''
|
|
|
|
def test_break_long(self):
|
|
# Wrap text with long words and lots of punctuation
|
|
|
|
self.check_wrap(self.text, 30,
|
|
['Did you say "supercalifragilis',
|
|
'ticexpialidocious?" How *do*',
|
|
'you spell that odd word,',
|
|
'anyways?'])
|
|
self.check_wrap(self.text, 50,
|
|
['Did you say "supercalifragilisticexpialidocious?"',
|
|
'How *do* you spell that odd word, anyways?'])
|
|
|
|
# SF bug 797650. Prevent an infinite loop by making sure that at
|
|
# least one character gets split off on every pass.
|
|
self.check_wrap('-'*10+'hello', 10,
|
|
['----------',
|
|
' h',
|
|
' e',
|
|
' l',
|
|
' l',
|
|
' o'],
|
|
subsequent_indent = ' '*15)
|
|
|
|
# bug 1146. Prevent a long word to be wrongly wrapped when the
|
|
# preceding word is exactly one character shorter than the width
|
|
self.check_wrap(self.text, 12,
|
|
['Did you say ',
|
|
'"supercalifr',
|
|
'agilisticexp',
|
|
'ialidocious?',
|
|
'" How *do*',
|
|
'you spell',
|
|
'that odd',
|
|
'word,',
|
|
'anyways?'])
|
|
|
|
def test_nobreak_long(self):
|
|
# Test with break_long_words disabled
|
|
self.wrapper.break_long_words = 0
|
|
self.wrapper.width = 30
|
|
expect = ['Did you say',
|
|
'"supercalifragilisticexpialidocious?"',
|
|
'How *do* you spell that odd',
|
|
'word, anyways?'
|
|
]
|
|
result = self.wrapper.wrap(self.text)
|
|
self.check(result, expect)
|
|
|
|
# Same thing with kwargs passed to standalone wrap() function.
|
|
result = wrap(self.text, width=30, break_long_words=0)
|
|
self.check(result, expect)
|
|
|
|
def test_max_lines_long(self):
|
|
self.check_wrap(self.text, 12,
|
|
['Did you say ',
|
|
'"supercalifr',
|
|
'agilisticexp',
|
|
'[...]'],
|
|
max_lines=4)
|
|
|
|
|
|
class IndentTestCases(BaseTestCase):
|
|
|
|
# called before each test method
|
|
def setUp(self):
|
|
self.text = '''\
|
|
This paragraph will be filled, first without any indentation,
|
|
and then with some (including a hanging indent).'''
|
|
|
|
|
|
def test_fill(self):
|
|
# Test the fill() method
|
|
|
|
expect = '''\
|
|
This paragraph will be filled, first
|
|
without any indentation, and then with
|
|
some (including a hanging indent).'''
|
|
|
|
result = fill(self.text, 40)
|
|
self.check(result, expect)
|
|
|
|
|
|
def test_initial_indent(self):
|
|
# Test initial_indent parameter
|
|
|
|
expect = [" This paragraph will be filled,",
|
|
"first without any indentation, and then",
|
|
"with some (including a hanging indent)."]
|
|
result = wrap(self.text, 40, initial_indent=" ")
|
|
self.check(result, expect)
|
|
|
|
expect = "\n".join(expect)
|
|
result = fill(self.text, 40, initial_indent=" ")
|
|
self.check(result, expect)
|
|
|
|
|
|
def test_subsequent_indent(self):
|
|
# Test subsequent_indent parameter
|
|
|
|
expect = '''\
|
|
* This paragraph will be filled, first
|
|
without any indentation, and then
|
|
with some (including a hanging
|
|
indent).'''
|
|
|
|
result = fill(self.text, 40,
|
|
initial_indent=" * ", subsequent_indent=" ")
|
|
self.check(result, expect)
|
|
|
|
|
|
# Despite the similar names, DedentTestCase is *not* the inverse
|
|
# of IndentTestCase!
|
|
class DedentTestCase(unittest.TestCase):
|
|
|
|
def assertUnchanged(self, text):
|
|
"""assert that dedent() has no effect on 'text'"""
|
|
self.assertEqual(text, dedent(text))
|
|
|
|
def test_dedent_nomargin(self):
|
|
# No lines indented.
|
|
text = "Hello there.\nHow are you?\nOh good, I'm glad."
|
|
self.assertUnchanged(text)
|
|
|
|
# Similar, with a blank line.
|
|
text = "Hello there.\n\nBoo!"
|
|
self.assertUnchanged(text)
|
|
|
|
# Some lines indented, but overall margin is still zero.
|
|
text = "Hello there.\n This is indented."
|
|
self.assertUnchanged(text)
|
|
|
|
# Again, add a blank line.
|
|
text = "Hello there.\n\n Boo!\n"
|
|
self.assertUnchanged(text)
|
|
|
|
def test_dedent_even(self):
|
|
# All lines indented by two spaces.
|
|
text = " Hello there.\n How are ya?\n Oh good."
|
|
expect = "Hello there.\nHow are ya?\nOh good."
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# Same, with blank lines.
|
|
text = " Hello there.\n\n How are ya?\n Oh good.\n"
|
|
expect = "Hello there.\n\nHow are ya?\nOh good.\n"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# Now indent one of the blank lines.
|
|
text = " Hello there.\n \n How are ya?\n Oh good.\n"
|
|
expect = "Hello there.\n\nHow are ya?\nOh good.\n"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
def test_dedent_uneven(self):
|
|
# Lines indented unevenly.
|
|
text = '''\
|
|
def foo():
|
|
while 1:
|
|
return foo
|
|
'''
|
|
expect = '''\
|
|
def foo():
|
|
while 1:
|
|
return foo
|
|
'''
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# Uneven indentation with a blank line.
|
|
text = " Foo\n Bar\n\n Baz\n"
|
|
expect = "Foo\n Bar\n\n Baz\n"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# Uneven indentation with a whitespace-only line.
|
|
text = " Foo\n Bar\n \n Baz\n"
|
|
expect = "Foo\n Bar\n\n Baz\n"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
def test_dedent_declining(self):
|
|
# Uneven indentation with declining indent level.
|
|
text = " Foo\n Bar\n" # 5 spaces, then 4
|
|
expect = " Foo\nBar\n"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# Declining indent level with blank line.
|
|
text = " Foo\n\n Bar\n" # 5 spaces, blank, then 4
|
|
expect = " Foo\n\nBar\n"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# Declining indent level with whitespace only line.
|
|
text = " Foo\n \n Bar\n" # 5 spaces, then 4, then 4
|
|
expect = " Foo\n\nBar\n"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# dedent() should not mangle internal tabs
|
|
def test_dedent_preserve_internal_tabs(self):
|
|
text = " hello\tthere\n how are\tyou?"
|
|
expect = "hello\tthere\nhow are\tyou?"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# make sure that it preserves tabs when it's not making any
|
|
# changes at all
|
|
self.assertEqual(expect, dedent(expect))
|
|
|
|
# dedent() should not mangle tabs in the margin (i.e.
|
|
# tabs and spaces both count as margin, but are *not*
|
|
# considered equivalent)
|
|
def test_dedent_preserve_margin_tabs(self):
|
|
text = " hello there\n\thow are you?"
|
|
self.assertUnchanged(text)
|
|
|
|
# same effect even if we have 8 spaces
|
|
text = " hello there\n\thow are you?"
|
|
self.assertUnchanged(text)
|
|
|
|
# dedent() only removes whitespace that can be uniformly removed!
|
|
text = "\thello there\n\thow are you?"
|
|
expect = "hello there\nhow are you?"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
text = " \thello there\n \thow are you?"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
text = " \t hello there\n \t how are you?"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
text = " \thello there\n \t how are you?"
|
|
expect = "hello there\n how are you?"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
# test margin is smaller than smallest indent
|
|
text = " \thello there\n \thow are you?\n \tI'm fine, thanks"
|
|
expect = " \thello there\n \thow are you?\n\tI'm fine, thanks"
|
|
self.assertEqual(expect, dedent(text))
|
|
|
|
|
|
# Test textwrap.indent
|
|
class IndentTestCase(unittest.TestCase):
|
|
# The examples used for tests. If any of these change, the expected
|
|
# results in the various test cases must also be updated.
|
|
# The roundtrip cases are separate, because textwrap.dedent doesn't
|
|
# handle Windows line endings
|
|
ROUNDTRIP_CASES = (
|
|
# Basic test case
|
|
"Hi.\nThis is a test.\nTesting.",
|
|
# Include a blank line
|
|
"Hi.\nThis is a test.\n\nTesting.",
|
|
# Include leading and trailing blank lines
|
|
"\nHi.\nThis is a test.\nTesting.\n",
|
|
)
|
|
CASES = ROUNDTRIP_CASES + (
|
|
# Use Windows line endings
|
|
"Hi.\r\nThis is a test.\r\nTesting.\r\n",
|
|
# Pathological case
|
|
"\nHi.\r\nThis is a test.\n\r\nTesting.\r\n\n",
|
|
)
|
|
|
|
def test_indent_nomargin_default(self):
|
|
# indent should do nothing if 'prefix' is empty.
|
|
for text in self.CASES:
|
|
self.assertEqual(indent(text, ''), text)
|
|
|
|
def test_indent_nomargin_explicit_default(self):
|
|
# The same as test_indent_nomargin, but explicitly requesting
|
|
# the default behaviour by passing None as the predicate
|
|
for text in self.CASES:
|
|
self.assertEqual(indent(text, '', None), text)
|
|
|
|
def test_indent_nomargin_all_lines(self):
|
|
# The same as test_indent_nomargin, but using the optional
|
|
# predicate argument
|
|
predicate = lambda line: True
|
|
for text in self.CASES:
|
|
self.assertEqual(indent(text, '', predicate), text)
|
|
|
|
def test_indent_no_lines(self):
|
|
# Explicitly skip indenting any lines
|
|
predicate = lambda line: False
|
|
for text in self.CASES:
|
|
self.assertEqual(indent(text, ' ', predicate), text)
|
|
|
|
def test_roundtrip_spaces(self):
|
|
# A whitespace prefix should roundtrip with dedent
|
|
for text in self.ROUNDTRIP_CASES:
|
|
self.assertEqual(dedent(indent(text, ' ')), text)
|
|
|
|
def test_roundtrip_tabs(self):
|
|
# A whitespace prefix should roundtrip with dedent
|
|
for text in self.ROUNDTRIP_CASES:
|
|
self.assertEqual(dedent(indent(text, '\t\t')), text)
|
|
|
|
def test_roundtrip_mixed(self):
|
|
# A whitespace prefix should roundtrip with dedent
|
|
for text in self.ROUNDTRIP_CASES:
|
|
self.assertEqual(dedent(indent(text, ' \t \t ')), text)
|
|
|
|
def test_indent_default(self):
|
|
# Test default indenting of lines that are not whitespace only
|
|
prefix = ' '
|
|
expected = (
|
|
# Basic test case
|
|
" Hi.\n This is a test.\n Testing.",
|
|
# Include a blank line
|
|
" Hi.\n This is a test.\n\n Testing.",
|
|
# Include leading and trailing blank lines
|
|
"\n Hi.\n This is a test.\n Testing.\n",
|
|
# Use Windows line endings
|
|
" Hi.\r\n This is a test.\r\n Testing.\r\n",
|
|
# Pathological case
|
|
"\n Hi.\r\n This is a test.\n\r\n Testing.\r\n\n",
|
|
)
|
|
for text, expect in zip(self.CASES, expected):
|
|
self.assertEqual(indent(text, prefix), expect)
|
|
|
|
def test_indent_explicit_default(self):
|
|
# Test default indenting of lines that are not whitespace only
|
|
prefix = ' '
|
|
expected = (
|
|
# Basic test case
|
|
" Hi.\n This is a test.\n Testing.",
|
|
# Include a blank line
|
|
" Hi.\n This is a test.\n\n Testing.",
|
|
# Include leading and trailing blank lines
|
|
"\n Hi.\n This is a test.\n Testing.\n",
|
|
# Use Windows line endings
|
|
" Hi.\r\n This is a test.\r\n Testing.\r\n",
|
|
# Pathological case
|
|
"\n Hi.\r\n This is a test.\n\r\n Testing.\r\n\n",
|
|
)
|
|
for text, expect in zip(self.CASES, expected):
|
|
self.assertEqual(indent(text, prefix, None), expect)
|
|
|
|
def test_indent_all_lines(self):
|
|
# Add 'prefix' to all lines, including whitespace-only ones.
|
|
prefix = ' '
|
|
expected = (
|
|
# Basic test case
|
|
" Hi.\n This is a test.\n Testing.",
|
|
# Include a blank line
|
|
" Hi.\n This is a test.\n \n Testing.",
|
|
# Include leading and trailing blank lines
|
|
" \n Hi.\n This is a test.\n Testing.\n",
|
|
# Use Windows line endings
|
|
" Hi.\r\n This is a test.\r\n Testing.\r\n",
|
|
# Pathological case
|
|
" \n Hi.\r\n This is a test.\n \r\n Testing.\r\n \n",
|
|
)
|
|
predicate = lambda line: True
|
|
for text, expect in zip(self.CASES, expected):
|
|
self.assertEqual(indent(text, prefix, predicate), expect)
|
|
|
|
def test_indent_empty_lines(self):
|
|
# Add 'prefix' solely to whitespace-only lines.
|
|
prefix = ' '
|
|
expected = (
|
|
# Basic test case
|
|
"Hi.\nThis is a test.\nTesting.",
|
|
# Include a blank line
|
|
"Hi.\nThis is a test.\n \nTesting.",
|
|
# Include leading and trailing blank lines
|
|
" \nHi.\nThis is a test.\nTesting.\n",
|
|
# Use Windows line endings
|
|
"Hi.\r\nThis is a test.\r\nTesting.\r\n",
|
|
# Pathological case
|
|
" \nHi.\r\nThis is a test.\n \r\nTesting.\r\n \n",
|
|
)
|
|
predicate = lambda line: not line.strip()
|
|
for text, expect in zip(self.CASES, expected):
|
|
self.assertEqual(indent(text, prefix, predicate), expect)
|
|
|
|
|
|
class ShortenTestCase(BaseTestCase):
|
|
|
|
def check_shorten(self, text, width, expect, **kwargs):
|
|
result = shorten(text, width, **kwargs)
|
|
self.check(result, expect)
|
|
|
|
def test_simple(self):
|
|
# Simple case: just words, spaces, and a bit of punctuation
|
|
text = "Hello there, how are you this fine day? I'm glad to hear it!"
|
|
|
|
self.check_shorten(text, 18, "Hello there, [...]")
|
|
self.check_shorten(text, len(text), text)
|
|
self.check_shorten(text, len(text) - 1,
|
|
"Hello there, how are you this fine day? "
|
|
"I'm glad to [...]")
|
|
|
|
def test_placeholder(self):
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text = "Hello there, how are you this fine day? I'm glad to hear it!"
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self.check_shorten(text, 17, "Hello there,$$", placeholder='$$')
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self.check_shorten(text, 18, "Hello there, how$$", placeholder='$$')
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self.check_shorten(text, 18, "Hello there, $$", placeholder=' $$')
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self.check_shorten(text, len(text), text, placeholder='$$')
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self.check_shorten(text, len(text) - 1,
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"Hello there, how are you this fine day? "
|
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"I'm glad to hear$$", placeholder='$$')
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|
|
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def test_empty_string(self):
|
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self.check_shorten("", 6, "")
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|
|
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def test_whitespace(self):
|
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# Whitespace collapsing
|
|
text = """
|
|
This is a paragraph that already has
|
|
line breaks and \t tabs too."""
|
|
self.check_shorten(text, 62,
|
|
"This is a paragraph that already has line "
|
|
"breaks and tabs too.")
|
|
self.check_shorten(text, 61,
|
|
"This is a paragraph that already has line "
|
|
"breaks and [...]")
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|
|
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self.check_shorten("hello world! ", 12, "hello world!")
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|
self.check_shorten("hello world! ", 11, "hello [...]")
|
|
# The leading space is trimmed from the placeholder
|
|
# (it would be ugly otherwise).
|
|
self.check_shorten("hello world! ", 10, "[...]")
|
|
|
|
def test_width_too_small_for_placeholder(self):
|
|
shorten("x" * 20, width=8, placeholder="(......)")
|
|
with self.assertRaises(ValueError):
|
|
shorten("x" * 20, width=8, placeholder="(.......)")
|
|
|
|
def test_first_word_too_long_but_placeholder_fits(self):
|
|
self.check_shorten("Helloo", 5, "[...]")
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|