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363 lines
13 KiB
Python
363 lines
13 KiB
Python
#
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# Test script 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 test import test_support
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from textwrap import TextWrapper, wrap, fill
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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)
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elif isinstance(textin, (str, unicode)):
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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.assertEquals(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.assertEquals(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, fix_sentence_endings=True)
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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_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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result = self.wrapper.wrap(text)
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self.check(result, expect)
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result = self.wrapper.fill(text)
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self.check(result, '\n'.join(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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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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# My initial mis-interpretation of part of the bug report --
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# These were always handled correctly, but it can't hurt to make
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# sure that they *stay* correct!
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self.check_split("--option", ["--option"])
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self.check_split("--option-opt", ["--option-", "opt"])
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def test_initial_whitespace(self):
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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_unicode(self):
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# *Very* simple test of wrapping Unicode strings. I'm sure
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# there's more to it than this, but let's at least make
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# sure textwrap doesn't crash on Unicode input!
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text = u"Hello there, how are you today?"
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self.check_wrap(text, 50, [u"Hello there, how are you today?"])
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self.check_wrap(text, 20, [u"Hello there, how are", "you today?"])
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olines = self.wrapper.wrap(text)
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assert isinstance(olines, list) and isinstance(olines[0], unicode)
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otext = self.wrapper.fill(text)
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assert isinstance(otext, unicode)
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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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class LongWordTestCase (BaseTestCase):
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def setUp(self):
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self.wrapper = TextWrapper()
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self.text = '''\
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Did you say "supercalifragilisticexpialidocious?"
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How *do* you spell that odd word, anyways?
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'''
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def test_break_long(self):
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# Wrap text with long words and lots of punctuation
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self.check_wrap(self.text, 30,
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['Did you say "supercalifragilis',
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'ticexpialidocious?" How *do*',
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'you spell that odd word,',
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'anyways?'])
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self.check_wrap(self.text, 50,
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['Did you say "supercalifragilisticexpialidocious?"',
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'How *do* you spell that odd word, anyways?'])
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def test_nobreak_long(self):
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# Test with break_long_words disabled
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self.wrapper.break_long_words = 0
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self.wrapper.width = 30
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expect = ['Did you say',
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'"supercalifragilisticexpialidocious?"',
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'How *do* you spell that odd',
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'word, anyways?'
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]
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result = self.wrapper.wrap(self.text)
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self.check(result, expect)
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# Same thing with kwargs passed to standalone wrap() function.
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result = wrap(self.text, width=30, break_long_words=0)
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self.check(result, expect)
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class IndentTestCases(BaseTestCase):
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# called before each test method
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def setUp(self):
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self.text = '''\
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This paragraph will be filled, first without any indentation,
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and then with some (including a hanging indent).'''
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def test_fill(self):
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# Test the fill() method
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expect = '''\
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This paragraph will be filled, first
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without any indentation, and then with
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some (including a hanging indent).'''
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result = fill(self.text, 40)
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self.check(result, expect)
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def test_initial_indent(self):
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# Test initial_indent parameter
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expect = [" This paragraph will be filled,",
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"first without any indentation, and then",
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"with some (including a hanging indent)."]
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result = wrap(self.text, 40, initial_indent=" ")
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self.check(result, expect)
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expect = "\n".join(expect)
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result = fill(self.text, 40, initial_indent=" ")
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self.check(result, expect)
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def test_subsequent_indent(self):
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# Test subsequent_indent parameter
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expect = '''\
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* This paragraph will be filled, first
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without any indentation, and then
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with some (including a hanging
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indent).'''
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result = fill(self.text, 40,
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initial_indent=" * ", subsequent_indent=" ")
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self.check(result, expect)
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def test_main():
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suite = unittest.TestSuite()
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suite.addTest(unittest.makeSuite(WrapTestCase))
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suite.addTest(unittest.makeSuite(LongWordTestCase))
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suite.addTest(unittest.makeSuite(IndentTestCases))
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test_support.run_suite(suite)
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if __name__ == '__main__':
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test_main()
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