libgo/go/text/tabwriter/tabwriter_test.go

   1 // Copyright 2009 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package tabwriter_test
   6
   7 import (
   8         "io"
   9         "testing"
  10         . "text/tabwriter"
  11 )
  12
  13 type buffer struct {
  14         a []byte
  15 }
  16
  17 func (b *buffer) init(n int) { b.a = make([]byte, n)[0:0] }
  18
  19 func (b *buffer) clear() { b.a = b.a[0:0] }
  20
  21 func (b *buffer) Write(buf []byte) (written int, err error) {
  22         n := len(b.a)
  23         m := len(buf)
  24         if n+m <= cap(b.a) {
  25                 b.a = b.a[0 : n+m]
  26                 for i := 0; i < m; i++ {
  27                         b.a[n+i] = buf[i]
  28                 }
  29         } else {
  30                 panic("buffer.Write: buffer too small")
  31         }
  32         return len(buf), nil
  33 }
  34
  35 func (b *buffer) String() string { return string(b.a) }
  36
  37 func write(t *testing.T, testname string, w *Writer, src string) {
  38         written, err := io.WriteString(w, src)
  39         if err != nil {
  40                 t.Errorf("--- test: %s\n--- src:\n%q\n--- write error: %v\n", testname, src, err)
  41         }
  42         if written != len(src) {
  43                 t.Errorf("--- test: %s\n--- src:\n%q\n--- written = %d, len(src) = %d\n", testname, src, written, len(src))
  44         }
  45 }
  46
  47 func verify(t *testing.T, testname string, w *Writer, b *buffer, src, expected string) {
  48         err := w.Flush()
  49         if err != nil {
  50                 t.Errorf("--- test: %s\n--- src:\n%q\n--- flush error: %v\n", testname, src, err)
  51         }
  52
  53         res := b.String()
  54         if res != expected {
  55                 t.Errorf("--- test: %s\n--- src:\n%q\n--- found:\n%q\n--- expected:\n%q\n", testname, src, res, expected)
  56         }
  57 }
  58
  59 func check(t *testing.T, testname string, minwidth, tabwidth, padding int, padchar byte, flags uint, src, expected string) {
  60         var b buffer
  61         b.init(1000)
  62
  63         var w Writer
  64         w.Init(&b, minwidth, tabwidth, padding, padchar, flags)
  65
  66         // write all at once
  67         title := testname + " (written all at once)"
  68         b.clear()
  69         write(t, title, &w, src)
  70         verify(t, title, &w, &b, src, expected)
  71
  72         // write byte-by-byte
  73         title = testname + " (written byte-by-byte)"
  74         b.clear()
  75         for i := 0; i < len(src); i++ {
  76                 write(t, title, &w, src[i:i+1])
  77         }
  78         verify(t, title, &w, &b, src, expected)
  79
  80         // write using Fibonacci slice sizes
  81         title = testname + " (written in fibonacci slices)"
  82         b.clear()
  83         for i, d := 0, 0; i < len(src); {
  84                 write(t, title, &w, src[i:i+d])
  85                 i, d = i+d, d+1
  86                 if i+d > len(src) {
  87                         d = len(src) - i
  88                 }
  89         }
  90         verify(t, title, &w, &b, src, expected)
  91 }
  92
  93 var tests = []struct {
  94         testname                    string
  95         minwidth, tabwidth, padding int
  96         padchar                     byte
  97         flags                       uint
  98         src, expected               string
  99 }{
 100         {
 101                 "1a",
 102                 8, 0, 1, '.', 0,
 103                 "",
 104                 "",
 105         },
 106
 107         {
 108                 "1a debug",
 109                 8, 0, 1, '.', Debug,
 110                 "",
 111                 "",
 112         },
 113
 114         {
 115                 "1b esc stripped",
 116                 8, 0, 1, '.', StripEscape,
 117                 "\xff\xff",
 118                 "",
 119         },
 120
 121         {
 122                 "1b esc",
 123                 8, 0, 1, '.', 0,
 124                 "\xff\xff",
 125                 "\xff\xff",
 126         },
 127
 128         {
 129                 "1c esc stripped",
 130                 8, 0, 1, '.', StripEscape,
 131                 "\xff\t\xff",
 132                 "\t",
 133         },
 134
 135         {
 136                 "1c esc",
 137                 8, 0, 1, '.', 0,
 138                 "\xff\t\xff",
 139                 "\xff\t\xff",
 140         },
 141
 142         {
 143                 "1d esc stripped",
 144                 8, 0, 1, '.', StripEscape,
 145                 "\xff\"foo\t\n\tbar\"\xff",
 146                 "\"foo\t\n\tbar\"",
 147         },
 148
 149         {
 150                 "1d esc",
 151                 8, 0, 1, '.', 0,
 152                 "\xff\"foo\t\n\tbar\"\xff",
 153                 "\xff\"foo\t\n\tbar\"\xff",
 154         },
 155
 156         {
 157                 "1e esc stripped",
 158                 8, 0, 1, '.', StripEscape,
 159                 "abc\xff\tdef", // unterminated escape
 160                 "abc\tdef",
 161         },
 162
 163         {
 164                 "1e esc",
 165                 8, 0, 1, '.', 0,
 166                 "abc\xff\tdef", // unterminated escape
 167                 "abc\xff\tdef",
 168         },
 169
 170         {
 171                 "2",
 172                 8, 0, 1, '.', 0,
 173                 "\n\n\n",
 174                 "\n\n\n",
 175         },
 176
 177         {
 178                 "3",
 179                 8, 0, 1, '.', 0,
 180                 "a\nb\nc",
 181                 "a\nb\nc",
 182         },
 183
 184         {
 185                 "4a",
 186                 8, 0, 1, '.', 0,
 187                 "\t", // '\t' terminates an empty cell on last line - nothing to print
 188                 "",
 189         },
 190
 191         {
 192                 "4b",
 193                 8, 0, 1, '.', AlignRight,
 194                 "\t", // '\t' terminates an empty cell on last line - nothing to print
 195                 "",
 196         },
 197
 198         {
 199                 "5",
 200                 8, 0, 1, '.', 0,
 201                 "*\t*",
 202                 "*.......*",
 203         },
 204
 205         {
 206                 "5b",
 207                 8, 0, 1, '.', 0,
 208                 "*\t*\n",
 209                 "*.......*\n",
 210         },
 211
 212         {
 213                 "5c",
 214                 8, 0, 1, '.', 0,
 215                 "*\t*\t",
 216                 "*.......*",
 217         },
 218
 219         {
 220                 "5c debug",
 221                 8, 0, 1, '.', Debug,
 222                 "*\t*\t",
 223                 "*.......|*",
 224         },
 225
 226         {
 227                 "5d",
 228                 8, 0, 1, '.', AlignRight,
 229                 "*\t*\t",
 230                 ".......**",
 231         },
 232
 233         {
 234                 "6",
 235                 8, 0, 1, '.', 0,
 236                 "\t\n",
 237                 "........\n",
 238         },
 239
 240         {
 241                 "7a",
 242                 8, 0, 1, '.', 0,
 243                 "a) foo",
 244                 "a) foo",
 245         },
 246
 247         {
 248                 "7b",
 249                 8, 0, 1, ' ', 0,
 250                 "b) foo\tbar",
 251                 "b) foo  bar",
 252         },
 253
 254         {
 255                 "7c",
 256                 8, 0, 1, '.', 0,
 257                 "c) foo\tbar\t",
 258                 "c) foo..bar",
 259         },
 260
 261         {
 262                 "7d",
 263                 8, 0, 1, '.', 0,
 264                 "d) foo\tbar\n",
 265                 "d) foo..bar\n",
 266         },
 267
 268         {
 269                 "7e",
 270                 8, 0, 1, '.', 0,
 271                 "e) foo\tbar\t\n",
 272                 "e) foo..bar.....\n",
 273         },
 274
 275         {
 276                 "7f",
 277                 8, 0, 1, '.', FilterHTML,
 278                 "f) f&lt;o\t<b>bar</b>\t\n",
 279                 "f) f&lt;o..<b>bar</b>.....\n",
 280         },
 281
 282         {
 283                 "7g",
 284                 8, 0, 1, '.', FilterHTML,
 285                 "g) f&lt;o\t<b>bar</b>\t non-terminated entity &amp",
 286                 "g) f&lt;o..<b>bar</b>..... non-terminated entity &amp",
 287         },
 288
 289         {
 290                 "7g debug",
 291                 8, 0, 1, '.', FilterHTML | Debug,
 292                 "g) f&lt;o\t<b>bar</b>\t non-terminated entity &amp",
 293                 "g) f&lt;o..|<b>bar</b>.....| non-terminated entity &amp",
 294         },
 295
 296         {
 297                 "8",
 298                 8, 0, 1, '*', 0,
 299                 "Hello, world!\n",
 300                 "Hello, world!\n",
 301         },
 302
 303         {
 304                 "9a",
 305                 1, 0, 0, '.', 0,
 306                 "1\t2\t3\t4\n" +
 307                         "11\t222\t3333\t44444\n",
 308
 309                 "1.2..3...4\n" +
 310                         "11222333344444\n",
 311         },
 312
 313         {
 314                 "9b",
 315                 1, 0, 0, '.', FilterHTML,
 316                 "1\t2<!---\f--->\t3\t4\n" + // \f inside HTML is ignored
 317                         "11\t222\t3333\t44444\n",
 318
 319                 "1.2<!---\f--->..3...4\n" +
 320                         "11222333344444\n",
 321         },
 322
 323         {
 324                 "9c",
 325                 1, 0, 0, '.', 0,
 326                 "1\t2\t3\t4\f" + // \f causes a newline and flush
 327                         "11\t222\t3333\t44444\n",
 328
 329                 "1234\n" +
 330                         "11222333344444\n",
 331         },
 332
 333         {
 334                 "9c debug",
 335                 1, 0, 0, '.', Debug,
 336                 "1\t2\t3\t4\f" + // \f causes a newline and flush
 337                         "11\t222\t3333\t44444\n",
 338
 339                 "1|2|3|4\n" +
 340                         "---\n" +
 341                         "11|222|3333|44444\n",
 342         },
 343
 344         {
 345                 "10a",
 346                 5, 0, 0, '.', 0,
 347                 "1\t2\t3\t4\n",
 348                 "1....2....3....4\n",
 349         },
 350
 351         {
 352                 "10b",
 353                 5, 0, 0, '.', 0,
 354                 "1\t2\t3\t4\t\n",
 355                 "1....2....3....4....\n",
 356         },
 357
 358         {
 359                 "11",
 360                 8, 0, 1, '.', 0,
 361                 "本\tb\tc\n" +
 362                         "aa\t\u672c\u672c\u672c\tcccc\tddddd\n" +
 363                         "aaa\tbbbb\n",
 364
 365                 "本.......b.......c\n" +
 366                         "aa......本本本.....cccc....ddddd\n" +
 367                         "aaa.....bbbb\n",
 368         },
 369
 370         {
 371                 "12a",
 372                 8, 0, 1, ' ', AlignRight,
 373                 "a\tè\tc\t\n" +
 374                         "aa\tèèè\tcccc\tddddd\t\n" +
 375                         "aaa\tèèèè\t\n",
 376
 377                 "       a       è       c\n" +
 378                         "      aa     èèè    cccc   ddddd\n" +
 379                         "     aaa    èèèè\n",
 380         },
 381
 382         {
 383                 "12b",
 384                 2, 0, 0, ' ', 0,
 385                 "a\tb\tc\n" +
 386                         "aa\tbbb\tcccc\n" +
 387                         "aaa\tbbbb\n",
 388
 389                 "a  b  c\n" +
 390                         "aa bbbcccc\n" +
 391                         "aaabbbb\n",
 392         },
 393
 394         {
 395                 "12c",
 396                 8, 0, 1, '_', 0,
 397                 "a\tb\tc\n" +
 398                         "aa\tbbb\tcccc\n" +
 399                         "aaa\tbbbb\n",
 400
 401                 "a_______b_______c\n" +
 402                         "aa______bbb_____cccc\n" +
 403                         "aaa_____bbbb\n",
 404         },
 405
 406         {
 407                 "13a",
 408                 4, 0, 1, '-', 0,
 409                 "4444\t日本語\t22\t1\t333\n" +
 410                         "999999999\t22\n" +
 411                         "7\t22\n" +
 412                         "\t\t\t88888888\n" +
 413                         "\n" +
 414                         "666666\t666666\t666666\t4444\n" +
 415                         "1\t1\t999999999\t0000000000\n",
 416
 417                 "4444------日本語-22--1---333\n" +
 418                         "999999999-22\n" +
 419                         "7---------22\n" +
 420                         "------------------88888888\n" +
 421                         "\n" +
 422                         "666666-666666-666666----4444\n" +
 423                         "1------1------999999999-0000000000\n",
 424         },
 425
 426         {
 427                 "13b",
 428                 4, 0, 3, '.', 0,
 429                 "4444\t333\t22\t1\t333\n" +
 430                         "999999999\t22\n" +
 431                         "7\t22\n" +
 432                         "\t\t\t88888888\n" +
 433                         "\n" +
 434                         "666666\t666666\t666666\t4444\n" +
 435                         "1\t1\t999999999\t0000000000\n",
 436
 437                 "4444........333...22...1...333\n" +
 438                         "999999999...22\n" +
 439                         "7...........22\n" +
 440                         "....................88888888\n" +
 441                         "\n" +
 442                         "666666...666666...666666......4444\n" +
 443                         "1........1........999999999...0000000000\n",
 444         },
 445
 446         {
 447                 "13c",
 448                 8, 8, 1, '\t', FilterHTML,
 449                 "4444\t333\t22\t1\t333\n" +
 450                         "999999999\t22\n" +
 451                         "7\t22\n" +
 452                         "\t\t\t88888888\n" +
 453                         "\n" +
 454                         "666666\t666666\t666666\t4444\n" +
 455                         "1\t1\t<font color=red attr=日本語>999999999</font>\t0000000000\n",
 456
 457                 "4444\t\t333\t22\t1\t333\n" +
 458                         "999999999\t22\n" +
 459                         "7\t\t22\n" +
 460                         "\t\t\t\t88888888\n" +
 461                         "\n" +
 462                         "666666\t666666\t666666\t\t4444\n" +
 463                         "1\t1\t<font color=red attr=日本語>999999999</font>\t0000000000\n",
 464         },
 465
 466         {
 467                 "14",
 468                 1, 0, 2, ' ', AlignRight,
 469                 ".0\t.3\t2.4\t-5.1\t\n" +
 470                         "23.0\t12345678.9\t2.4\t-989.4\t\n" +
 471                         "5.1\t12.0\t2.4\t-7.0\t\n" +
 472                         ".0\t0.0\t332.0\t8908.0\t\n" +
 473                         ".0\t-.3\t456.4\t22.1\t\n" +
 474                         ".0\t1.2\t44.4\t-13.3\t\t",
 475
 476                 "    .0          .3    2.4    -5.1\n" +
 477                         "  23.0  12345678.9    2.4  -989.4\n" +
 478                         "   5.1        12.0    2.4    -7.0\n" +
 479                         "    .0         0.0  332.0  8908.0\n" +
 480                         "    .0         -.3  456.4    22.1\n" +
 481                         "    .0         1.2   44.4   -13.3",
 482         },
 483
 484         {
 485                 "14 debug",
 486                 1, 0, 2, ' ', AlignRight | Debug,
 487                 ".0\t.3\t2.4\t-5.1\t\n" +
 488                         "23.0\t12345678.9\t2.4\t-989.4\t\n" +
 489                         "5.1\t12.0\t2.4\t-7.0\t\n" +
 490                         ".0\t0.0\t332.0\t8908.0\t\n" +
 491                         ".0\t-.3\t456.4\t22.1\t\n" +
 492                         ".0\t1.2\t44.4\t-13.3\t\t",
 493
 494                 "    .0|          .3|    2.4|    -5.1|\n" +
 495                         "  23.0|  12345678.9|    2.4|  -989.4|\n" +
 496                         "   5.1|        12.0|    2.4|    -7.0|\n" +
 497                         "    .0|         0.0|  332.0|  8908.0|\n" +
 498                         "    .0|         -.3|  456.4|    22.1|\n" +
 499                         "    .0|         1.2|   44.4|   -13.3|",
 500         },
 501
 502         {
 503                 "15a",
 504                 4, 0, 0, '.', 0,
 505                 "a\t\tb",
 506                 "a.......b",
 507         },
 508
 509         {
 510                 "15b",
 511                 4, 0, 0, '.', DiscardEmptyColumns,
 512                 "a\t\tb", // htabs - do not discard column
 513                 "a.......b",
 514         },
 515
 516         {
 517                 "15c",
 518                 4, 0, 0, '.', DiscardEmptyColumns,
 519                 "a\v\vb",
 520                 "a...b",
 521         },
 522
 523         {
 524                 "15d",
 525                 4, 0, 0, '.', AlignRight | DiscardEmptyColumns,
 526                 "a\v\vb",
 527                 "...ab",
 528         },
 529
 530         {
 531                 "16a",
 532                 100, 100, 0, '\t', 0,
 533                 "a\tb\t\td\n" +
 534                         "a\tb\t\td\te\n" +
 535                         "a\n" +
 536                         "a\tb\tc\td\n" +
 537                         "a\tb\tc\td\te\n",
 538
 539                 "a\tb\t\td\n" +
 540                         "a\tb\t\td\te\n" +
 541                         "a\n" +
 542                         "a\tb\tc\td\n" +
 543                         "a\tb\tc\td\te\n",
 544         },
 545
 546         {
 547                 "16b",
 548                 100, 100, 0, '\t', DiscardEmptyColumns,
 549                 "a\vb\v\vd\n" +
 550                         "a\vb\v\vd\ve\n" +
 551                         "a\n" +
 552                         "a\vb\vc\vd\n" +
 553                         "a\vb\vc\vd\ve\n",
 554
 555                 "a\tb\td\n" +
 556                         "a\tb\td\te\n" +
 557                         "a\n" +
 558                         "a\tb\tc\td\n" +
 559                         "a\tb\tc\td\te\n",
 560         },
 561
 562         {
 563                 "16b debug",
 564                 100, 100, 0, '\t', DiscardEmptyColumns | Debug,
 565                 "a\vb\v\vd\n" +
 566                         "a\vb\v\vd\ve\n" +
 567                         "a\n" +
 568                         "a\vb\vc\vd\n" +
 569                         "a\vb\vc\vd\ve\n",
 570
 571                 "a\t|b\t||d\n" +
 572                         "a\t|b\t||d\t|e\n" +
 573                         "a\n" +
 574                         "a\t|b\t|c\t|d\n" +
 575                         "a\t|b\t|c\t|d\t|e\n",
 576         },
 577
 578         {
 579                 "16c",
 580                 100, 100, 0, '\t', DiscardEmptyColumns,
 581                 "a\tb\t\td\n" + // hard tabs - do not discard column
 582                         "a\tb\t\td\te\n" +
 583                         "a\n" +
 584                         "a\tb\tc\td\n" +
 585                         "a\tb\tc\td\te\n",
 586
 587                 "a\tb\t\td\n" +
 588                         "a\tb\t\td\te\n" +
 589                         "a\n" +
 590                         "a\tb\tc\td\n" +
 591                         "a\tb\tc\td\te\n",
 592         },
 593
 594         {
 595                 "16c debug",
 596                 100, 100, 0, '\t', DiscardEmptyColumns | Debug,
 597                 "a\tb\t\td\n" + // hard tabs - do not discard column
 598                         "a\tb\t\td\te\n" +
 599                         "a\n" +
 600                         "a\tb\tc\td\n" +
 601                         "a\tb\tc\td\te\n",
 602
 603                 "a\t|b\t|\t|d\n" +
 604                         "a\t|b\t|\t|d\t|e\n" +
 605                         "a\n" +
 606                         "a\t|b\t|c\t|d\n" +
 607                         "a\t|b\t|c\t|d\t|e\n",
 608         },
 609 }
 610
 611 func Test(t *testing.T) {
 612         for _, e := range tests {
 613                 check(t, e.testname, e.minwidth, e.tabwidth, e.padding, e.padchar, e.flags, e.src, e.expected)
 614         }
 615 }