#
# Test script for the textwrap module.
#
# Original tests written by Greg Ward <gward@python.net>.
# Converted to PyUnit by Peter Hansen <peter@engcorp.com>.
# Currently maintained by Greg Ward.
#
# $Id$
#
import unittest
from test import test_support
from textwrap import TextWrapper, wrap, fill
class BaseTestCase(unittest.TestCase):
'''Parent class with utility methods for textwrap tests.'''
def show(self, textin):
if isinstance(textin, list):
result = []
for i in range(len(textin)):
result.append(" %d: %r" % (i, textin[i]))
result = '\n'.join(result)
elif isinstance(textin, (str, unicode)):
result = " %s\n" % repr(textin)
return result
def check(self, result, expect):
self.assertEquals(result, expect,
'expected:\n%s\nbut got:\n%s' % (
self.show(expect), self.show(result)))
def check_wrap(self, text, width, expect, **kwargs):
result = wrap(text, width, **kwargs)
self.check(result, expect)
def check_split(self, text, expect):
result = self.wrapper._split(text)
self.assertEquals(result, expect,
"\nexpected %r\n"
"but got %r" % (expect, result))
class WrapTestCase(BaseTestCase):
def setUp(self):
self.wrapper = TextWrapper(width=45, fix_sentence_endings=True)
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_wrap(text, 12,
["Hello there,",
"how are you",
"this fine",
"day? I'm",
"glad to hear",
"it!"])
self.check_wrap(text, 42,
["Hello there, how are you this fine day?",
"I'm glad to hear it!"])
self.check_wrap(text, 80, [text])
def test_whitespace(self):
# Whitespace munging and end-of-sentence detection
text = """\
This is a paragraph that already has
line breaks. But some of its lines are much longer than the others,
so it needs to be wrapped.
Some lines are \ttabbed too.
What a mess!
"""
expect = ["This is a paragraph that already has line",
"breaks. But some of its lines are much",
"longer than the others, so it needs to be",
"wrapped. Some lines are tabbed too. What a",
"mess!"]
result = self.wrapper.wrap(text)
self.check(result, expect)
result = self.wrapper.fill(text)
self.check(result, '\n'.join(expect))
def test_wrap_short(self):
# Wrapping to make short lines longer
text = "This is a\nshort paragraph."
self.check_wrap(text, 20, ["This is a short",
"paragraph."])
self.check_wrap(text, 40, ["This is a short paragraph."])
def test_wrap_short_1line(self):
# Test endcases
text = "This is a short line."
self.check_wrap(text, 30, ["This is a short line."])
self.check_wrap(text, 30, ["(1) This is a short line."],
initial_indent="(1) ")
def test_hyphenated(self):
# Test breaking hyphenated words
text = ("this-is-a-useful-feature-for-"
"reformatting-posts-from-tim-peters'ly")
self.check_wrap(text, 40,
["this-is-a-useful-feature-for-",
"reformatting-posts-from-tim-peters'ly"])
self.check_wrap(text, 41,
["this-is-a-useful-feature-for-",
"reformatting-posts-from-tim-peters'ly"])
self.check_wrap(text, 42,
["this-is-a-useful-feature-for-reformatting-",
"posts-from-tim-peters'ly"])
def test_em_dash(self):
# Test text with em-dashes
text = "Em-dashes should be written -- thus."
self.check_wrap(text, 25,
["Em-dashes should be",
"written -- thus."])
# Probe the boundaries of the properly written em-dash,
# ie. " -- ".
self.check_wrap(text, 29,
["Em-dashes should be written",
"-- thus."])
expect = ["Em-dashes should be written --",
"thus."]
self.check_wrap(text, 30, expect)
self.check_wrap(text, 35, expect)
self.check_wrap(text, 36,
["Em-dashes should be written -- thus."])
# The improperly written em-dash is handled too, because
# it's adjacent to non-whitespace on both sides.
text = "You can also do--this or even---this."
expect = ["You can also do",
"--this or even",
"---this."]
self.check_wrap(text, 15, expect)
self.check_wrap(text, 16, expect)
expect = ["You can also do--",
"this or even---",
"this."]
self.check_wrap(text, 17, expect)
self.check_wrap(text, 19, expect)
expect = ["You can also do--this or even",
"---this."]
self.check_wrap(text, 29, expect)
self.check_wrap(text, 31, expect)
expect = ["You can also do--this or even---",
"this."]
self.check_wrap(text, 32, expect)
self.check_wrap(text, 35, expect)
# All of the above behaviour could be deduced by probing the
# _split() method.
text = "Here's an -- em-dash and--here's another---and another!"
expect = ["Here's", " ", "an", " ", "--", " ", "em-", "dash", " ",
"and", "--", "here's", " ", "another", "---",
"and", " ", "another!"]
self.check_split(text, expect)
text = "and then--bam!--he was gone"
expect = ["and", " ", "then", "--", "bam!", "--",
"he", " ", "was", " ", "gone"]
self.check_split(text, expect)
def test_unix_options (self):
# Test that Unix-style command-line options are wrapped correctly.
# Both Optik (OptionParser) and Docutils rely on this behaviour!
text = "You should use the -n option, or --dry-run in its long form."
self.check_wrap(text, 20,
["You should use the",
"-n option, or --dry-",
"run in its long",
"form."])
self.check_wrap(text, 21,
["You should use the -n",
"option, or --dry-run",
"in its long form."])
expect = ["You should use the -n option, or",
"--dry-run in its long form."]
self.check_wrap(text, 32, expect)
self.check_wrap(text, 34, expect)
self.check_wrap(text, 35, expect)
self.check_wrap(text, 38, expect)
expect = ["You should use the -n option, or --dry-",
"run in its long form."]
self.check_wrap(text, 39, expect)
self.check_wrap(text, 41, expect)
expect = ["You should use the -n option, or --dry-run",
"in its long form."]
self.check_wrap(text, 42, expect)
# Again, all of the above can be deduced from _split().
text = "the -n option, or --dry-run or --dryrun"
expect = ["the", " ", "-n", " ", "option,", " ", "or", " ",
"--dry-", "run", " ", "or", " ", "--dryrun"]
self.check_split(text, expect)
def test_funky_hyphens (self):
# Screwy edge cases cooked up by David Goodger. All reported
# in SF bug #596434.
self.check_split("what the--hey!", ["what", " ", "the", "--", "hey!"])
self.check_split("what the--", ["what", " ", "the--"])
self.check_split("what the--.", ["what", " ", "the--."])
self.check_split("--text--.", ["--text--."])
# My initial mis-interpretation of part of the bug report --
# These were always handled correctly, but it can't hurt to make
# sure that they *stay* correct!
self.check_split("--option", ["--option"])
self.check_split("--option-opt", ["--option-", "opt"])
def test_initial_whitespace(self):
# SF bug #622849 reported inconsistent handling of leading
# whitespace; let's test that a bit, shall we?
text = " This is a sentence with leading whitespace."
self.check_wrap(text, 50,
[" This is a sentence with leading whitespace."])
self.check_wrap(text, 30,
[" This is a sentence with", "leading whitespace."])
def test_unicode(self):
# *Very* simple test of wrapping Unicode strings. I'm sure
# there's more to it than this, but let's at least make
# sure textwrap doesn't crash on Unicode input!
text = u"Hello there, how are you today?"
self.check_wrap(text, 50, [u"Hello there, how are you today?"])
self.check_wrap(text, 20, [u"Hello there, how are", "you today?"])
olines = self.wrapper.wrap(text)
assert isinstance(olines, list) and isinstance(olines[0], unicode)
otext = self.wrapper.fill(text)
assert isinstance(otext, unicode)
def test_split(self):
# Ensure that the standard _split() method works as advertised
# in the comments
text = "Hello there -- you goof-ball, use the -b option!"
result = self.wrapper._split(text)
self.check(result,
["Hello", " ", "there", " ", "--", " ", "you", " ", "goof-",
"ball,", " ", "use", " ", "the", " ", "-b", " ", "option!"])
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?'])
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)
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)
def test_main():
suite = unittest.TestSuite()
suite.addTest(unittest.makeSuite(WrapTestCase))
suite.addTest(unittest.makeSuite(LongWordTestCase))
suite.addTest(unittest.makeSuite(IndentTestCases))
test_support.run_suite(suite)
if __name__ == '__main__':
test_main()