/usr/lib/python2.7/test/test_textwrap.py is in libpython2.7-testsuite 2.7.15~rc1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 | #
# Test suite 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, dedent
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, basestring):
result = " %s\n" % repr(textin)
return result
def check(self, result, expect):
self.assertEqual(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.assertEqual(result, expect,
"\nexpected %r\n"
"but got %r" % (expect, result))
class WrapTestCase(BaseTestCase):
def setUp(self):
self.wrapper = TextWrapper(width=45)
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_empty_string(self):
# Check that wrapping the empty string returns an empty list.
self.check_wrap("", 6, [])
self.check_wrap("", 6, [], drop_whitespace=False)
def test_empty_string_with_initial_indent(self):
# Check that the empty string is not indented.
self.check_wrap("", 6, [], initial_indent="++")
self.check_wrap("", 6, [], initial_indent="++", drop_whitespace=False)
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!"]
wrapper = TextWrapper(45, fix_sentence_endings=True)
result = wrapper.wrap(text)
self.check(result, expect)
result = wrapper.fill(text)
self.check(result, '\n'.join(expect))
def test_fix_sentence_endings(self):
wrapper = TextWrapper(60, fix_sentence_endings=True)
# SF #847346: ensure that fix_sentence_endings=True does the
# right thing even on input short enough that it doesn't need to
# be wrapped.
text = "A short line. Note the single space."
expect = ["A short line. Note the single space."]
self.check(wrapper.wrap(text), expect)
# Test some of the hairy end cases that _fix_sentence_endings()
# is supposed to handle (the easy stuff is tested in
# test_whitespace() above).
text = "Well, Doctor? What do you think?"
expect = ["Well, Doctor? What do you think?"]
self.check(wrapper.wrap(text), expect)
text = "Well, Doctor?\nWhat do you think?"
self.check(wrapper.wrap(text), expect)
text = 'I say, chaps! Anyone for "tennis?"\nHmmph!'
expect = ['I say, chaps! Anyone for "tennis?" Hmmph!']
self.check(wrapper.wrap(text), expect)
wrapper.width = 20
expect = ['I say, chaps!', 'Anyone for "tennis?"', 'Hmmph!']
self.check(wrapper.wrap(text), expect)
text = 'And she said, "Go to hell!"\nCan you believe that?'
expect = ['And she said, "Go to',
'hell!" Can you',
'believe that?']
self.check(wrapper.wrap(text), expect)
wrapper.width = 60
expect = ['And she said, "Go to hell!" Can you believe that?']
self.check(wrapper.wrap(text), expect)
text = 'File stdio.h is nice.'
expect = ['File stdio.h is nice.']
self.check(wrapper.wrap(text), 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_hyphenated_numbers(self):
# Test that hyphenated numbers (eg. dates) are not broken like words.
text = ("Python 1.0.0 was released on 1994-01-26. Python 1.0.1 was\n"
"released on 1994-02-15.")
self.check_wrap(text, 35, ['Python 1.0.0 was released on',
'1994-01-26. Python 1.0.1 was',
'released on 1994-02-15.'])
self.check_wrap(text, 40, ['Python 1.0.0 was released on 1994-01-26.',
'Python 1.0.1 was released on 1994-02-15.'])
text = "I do all my shopping at 7-11."
self.check_wrap(text, 25, ["I do all my shopping at",
"7-11."])
self.check_wrap(text, 27, ["I do all my shopping at",
"7-11."])
self.check_wrap(text, 29, ["I do all my shopping at 7-11."])
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--."])
# When I first read bug #596434, this is what I thought David
# was talking about. I was wrong; these have always worked
# fine. The real problem is tested in test_funky_parens()
# below...
self.check_split("--option", ["--option"])
self.check_split("--option-opt", ["--option-", "opt"])
self.check_split("foo --option-opt bar",
["foo", " ", "--option-", "opt", " ", "bar"])
def test_punct_hyphens(self):
# Oh bother, SF #965425 found another problem with hyphens --
# hyphenated words in single quotes weren't handled correctly.
# In fact, the bug is that *any* punctuation around a hyphenated
# word was handled incorrectly, except for a leading "--", which
# was special-cased for Optik and Docutils. So test a variety
# of styles of punctuation around a hyphenated word.
# (Actually this is based on an Optik bug report, #813077).
self.check_split("the 'wibble-wobble' widget",
['the', ' ', "'wibble-", "wobble'", ' ', 'widget'])
self.check_split('the "wibble-wobble" widget',
['the', ' ', '"wibble-', 'wobble"', ' ', 'widget'])
self.check_split("the (wibble-wobble) widget",
['the', ' ', "(wibble-", "wobble)", ' ', 'widget'])
self.check_split("the ['wibble-wobble'] widget",
['the', ' ', "['wibble-", "wobble']", ' ', 'widget'])
def test_funky_parens (self):
# Second part of SF bug #596434: long option strings inside
# parentheses.
self.check_split("foo (--option) bar",
["foo", " ", "(--option)", " ", "bar"])
# Related stuff -- make sure parens work in simpler contexts.
self.check_split("foo (bar) baz",
["foo", " ", "(bar)", " ", "baz"])
self.check_split("blah (ding dong), wubba",
["blah", " ", "(ding", " ", "dong),",
" ", "wubba"])
def test_drop_whitespace_false(self):
# Check that drop_whitespace=False preserves whitespace.
# SF patch #1581073
text = " This is a sentence with much whitespace."
self.check_wrap(text, 10,
[" This is a", " ", "sentence ",
"with ", "much white", "space."],
drop_whitespace=False)
def test_drop_whitespace_false_whitespace_only(self):
# Check that drop_whitespace=False preserves a whitespace-only string.
self.check_wrap(" ", 6, [" "], drop_whitespace=False)
def test_drop_whitespace_false_whitespace_only_with_indent(self):
# Check that a whitespace-only string gets indented (when
# drop_whitespace is False).
self.check_wrap(" ", 6, [" "], drop_whitespace=False,
initial_indent=" ")
def test_drop_whitespace_whitespace_only(self):
# Check drop_whitespace on a whitespace-only string.
self.check_wrap(" ", 6, [])
def test_drop_whitespace_leading_whitespace(self):
# Check that drop_whitespace does not drop leading whitespace (if
# followed by non-whitespace).
# 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_drop_whitespace_whitespace_line(self):
# Check that drop_whitespace skips the whole line if a non-leading
# line consists only of whitespace.
text = "abcd efgh"
# Include the result for drop_whitespace=False for comparison.
self.check_wrap(text, 6, ["abcd", " ", "efgh"],
drop_whitespace=False)
self.check_wrap(text, 6, ["abcd", "efgh"])
def test_drop_whitespace_whitespace_only_with_indent(self):
# Check that initial_indent is not applied to a whitespace-only
# string. This checks a special case of the fact that dropping
# whitespace occurs before indenting.
self.check_wrap(" ", 6, [], initial_indent="++")
def test_drop_whitespace_whitespace_indent(self):
# Check that drop_whitespace does not drop whitespace indents.
# This checks a special case of the fact that dropping whitespace
# occurs before indenting.
self.check_wrap("abcd efgh", 6, [" abcd", " efgh"],
initial_indent=" ", subsequent_indent=" ")
if test_support.have_unicode:
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)
self.assertIsInstance(olines, list)
self.assertIsInstance(olines[0], unicode)
otext = self.wrapper.fill(text)
self.assertIsInstance(otext, unicode)
def test_no_split_at_umlaut(self):
text = u"Die Empf\xe4nger-Auswahl"
self.check_wrap(text, 13, [u"Die", u"Empf\xe4nger-", u"Auswahl"])
def test_umlaut_followed_by_dash(self):
text = u"aa \xe4\xe4-\xe4\xe4"
self.check_wrap(text, 7, [u"aa \xe4\xe4-", u"\xe4\xe4"])
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!"])
def test_break_on_hyphens(self):
# Ensure that the break_on_hyphens attributes work
text = "yaba daba-doo"
self.check_wrap(text, 10, ["yaba daba-", "doo"],
break_on_hyphens=True)
self.check_wrap(text, 10, ["yaba", "daba-doo"],
break_on_hyphens=False)
def test_bad_width(self):
# Ensure that width <= 0 is caught.
text = "Whatever, it doesn't matter."
self.assertRaises(ValueError, wrap, text, 0)
self.assertRaises(ValueError, wrap, text, -1)
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)
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))
# 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))
def test_main():
test_support.run_unittest(WrapTestCase,
LongWordTestCase,
IndentTestCases,
DedentTestCase)
if __name__ == '__main__':
test_main()
|