base/i18n/break_iterator_unittest.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/i18n/break_iterator.h"
   6
   7 #include "base/strings/string_piece.h"
   8 #include "base/strings/stringprintf.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace base {
  13 namespace i18n {
  14
  15 TEST(BreakIteratorTest, BreakWordEmpty) {
  16   string16 empty;
  17   BreakIterator iter(empty, BreakIterator::BREAK_WORD);
  18   ASSERT_TRUE(iter.Init());
  19   EXPECT_FALSE(iter.Advance());
  20   EXPECT_FALSE(iter.IsWord());
  21   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
  22   EXPECT_FALSE(iter.IsWord());
  23 }
  24
  25 TEST(BreakIteratorTest, BreakWord) {
  26   string16 space(UTF8ToUTF16(" "));
  27   string16 str(UTF8ToUTF16(" foo bar! \npouet boom"));
  28   BreakIterator iter(str, BreakIterator::BREAK_WORD);
  29   ASSERT_TRUE(iter.Init());
  30   EXPECT_TRUE(iter.Advance());
  31   EXPECT_FALSE(iter.IsWord());
  32   EXPECT_EQ(space, iter.GetString());
  33   EXPECT_TRUE(iter.Advance());
  34   EXPECT_TRUE(iter.IsWord());
  35   EXPECT_EQ(UTF8ToUTF16("foo"), iter.GetString());
  36   EXPECT_TRUE(iter.Advance());
  37   EXPECT_FALSE(iter.IsWord());
  38   EXPECT_EQ(space, iter.GetString());
  39   EXPECT_TRUE(iter.Advance());
  40   EXPECT_TRUE(iter.IsWord());
  41   EXPECT_EQ(UTF8ToUTF16("bar"), iter.GetString());
  42   EXPECT_TRUE(iter.Advance());
  43   EXPECT_FALSE(iter.IsWord());
  44   EXPECT_EQ(UTF8ToUTF16("!"), iter.GetString());
  45   EXPECT_TRUE(iter.Advance());
  46   EXPECT_FALSE(iter.IsWord());
  47   EXPECT_EQ(space, iter.GetString());
  48   EXPECT_TRUE(iter.Advance());
  49   EXPECT_FALSE(iter.IsWord());
  50   EXPECT_EQ(UTF8ToUTF16("\n"), iter.GetString());
  51   EXPECT_TRUE(iter.Advance());
  52   EXPECT_TRUE(iter.IsWord());
  53   EXPECT_EQ(UTF8ToUTF16("pouet"), iter.GetString());
  54   EXPECT_TRUE(iter.Advance());
  55   EXPECT_FALSE(iter.IsWord());
  56   EXPECT_EQ(space, iter.GetString());
  57   EXPECT_TRUE(iter.Advance());
  58   EXPECT_TRUE(iter.IsWord());
  59   EXPECT_EQ(UTF8ToUTF16("boom"), iter.GetString());
  60   EXPECT_FALSE(iter.Advance());
  61   EXPECT_FALSE(iter.IsWord());
  62   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
  63   EXPECT_FALSE(iter.IsWord());
  64 }
  65
  66 TEST(BreakIteratorTest, BreakWide16) {
  67   // Two greek words separated by space.
  68   const string16 str(WideToUTF16(
  69       L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9"
  70       L"\x03bf\x03c2\x0020\x0399\x03c3\x03c4\x03cc\x03c2"));
  71   const string16 word1(str.substr(0, 10));
  72   const string16 word2(str.substr(11, 5));
  73   BreakIterator iter(str, BreakIterator::BREAK_WORD);
  74   ASSERT_TRUE(iter.Init());
  75   EXPECT_TRUE(iter.Advance());
  76   EXPECT_TRUE(iter.IsWord());
  77   EXPECT_EQ(word1, iter.GetString());
  78   EXPECT_TRUE(iter.Advance());
  79   EXPECT_FALSE(iter.IsWord());
  80   EXPECT_EQ(UTF8ToUTF16(" "), iter.GetString());
  81   EXPECT_TRUE(iter.Advance());
  82   EXPECT_TRUE(iter.IsWord());
  83   EXPECT_EQ(word2, iter.GetString());
  84   EXPECT_FALSE(iter.Advance());
  85   EXPECT_FALSE(iter.IsWord());
  86   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
  87   EXPECT_FALSE(iter.IsWord());
  88 }
  89
  90 TEST(BreakIteratorTest, BreakWide32) {
  91   // U+1D49C MATHEMATICAL SCRIPT CAPITAL A
  92   const char very_wide_char[] = "\xF0\x9D\x92\x9C";
  93   const string16 str(
  94       UTF8ToUTF16(base::StringPrintf("%s a", very_wide_char)));
  95   const string16 very_wide_word(str.substr(0, 2));
  96
  97   BreakIterator iter(str, BreakIterator::BREAK_WORD);
  98   ASSERT_TRUE(iter.Init());
  99   EXPECT_TRUE(iter.Advance());
 100   EXPECT_TRUE(iter.IsWord());
 101   EXPECT_EQ(very_wide_word, iter.GetString());
 102   EXPECT_TRUE(iter.Advance());
 103   EXPECT_FALSE(iter.IsWord());
 104   EXPECT_EQ(UTF8ToUTF16(" "), iter.GetString());
 105   EXPECT_TRUE(iter.Advance());
 106   EXPECT_TRUE(iter.IsWord());
 107   EXPECT_EQ(UTF8ToUTF16("a"), iter.GetString());
 108   EXPECT_FALSE(iter.Advance());
 109   EXPECT_FALSE(iter.IsWord());
 110   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
 111   EXPECT_FALSE(iter.IsWord());
 112 }
 113
 114 TEST(BreakIteratorTest, BreakSpaceEmpty) {
 115   string16 empty;
 116   BreakIterator iter(empty, BreakIterator::BREAK_SPACE);
 117   ASSERT_TRUE(iter.Init());
 118   EXPECT_FALSE(iter.Advance());
 119   EXPECT_FALSE(iter.IsWord());
 120   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
 121   EXPECT_FALSE(iter.IsWord());
 122 }
 123
 124 TEST(BreakIteratorTest, BreakSpace) {
 125   string16 str(UTF8ToUTF16(" foo bar! \npouet boom"));
 126   BreakIterator iter(str, BreakIterator::BREAK_SPACE);
 127   ASSERT_TRUE(iter.Init());
 128   EXPECT_TRUE(iter.Advance());
 129   EXPECT_FALSE(iter.IsWord());
 130   EXPECT_EQ(UTF8ToUTF16(" "), iter.GetString());
 131   EXPECT_TRUE(iter.Advance());
 132   EXPECT_FALSE(iter.IsWord());
 133   EXPECT_EQ(UTF8ToUTF16("foo "), iter.GetString());
 134   EXPECT_TRUE(iter.Advance());
 135   EXPECT_FALSE(iter.IsWord());
 136   EXPECT_EQ(UTF8ToUTF16("bar! \n"), iter.GetString());
 137   EXPECT_TRUE(iter.Advance());
 138   EXPECT_FALSE(iter.IsWord());
 139   EXPECT_EQ(UTF8ToUTF16("pouet "), iter.GetString());
 140   EXPECT_TRUE(iter.Advance());
 141   EXPECT_FALSE(iter.IsWord());
 142   EXPECT_EQ(UTF8ToUTF16("boom"), iter.GetString());
 143   EXPECT_FALSE(iter.Advance());
 144   EXPECT_FALSE(iter.IsWord());
 145   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
 146   EXPECT_FALSE(iter.IsWord());
 147 }
 148
 149 TEST(BreakIteratorTest, BreakSpaceSP) {
 150   string16 str(UTF8ToUTF16(" foo bar! \npouet boom "));
 151   BreakIterator iter(str, BreakIterator::BREAK_SPACE);
 152   ASSERT_TRUE(iter.Init());
 153   EXPECT_TRUE(iter.Advance());
 154   EXPECT_FALSE(iter.IsWord());
 155   EXPECT_EQ(UTF8ToUTF16(" "), iter.GetString());
 156   EXPECT_TRUE(iter.Advance());
 157   EXPECT_FALSE(iter.IsWord());
 158   EXPECT_EQ(UTF8ToUTF16("foo "), iter.GetString());
 159   EXPECT_TRUE(iter.Advance());
 160   EXPECT_FALSE(iter.IsWord());
 161   EXPECT_EQ(UTF8ToUTF16("bar! \n"), iter.GetString());
 162   EXPECT_TRUE(iter.Advance());
 163   EXPECT_FALSE(iter.IsWord());
 164   EXPECT_EQ(UTF8ToUTF16("pouet "), iter.GetString());
 165   EXPECT_TRUE(iter.Advance());
 166   EXPECT_FALSE(iter.IsWord());
 167   EXPECT_EQ(UTF8ToUTF16("boom "), iter.GetString());
 168   EXPECT_FALSE(iter.Advance());
 169   EXPECT_FALSE(iter.IsWord());
 170   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
 171   EXPECT_FALSE(iter.IsWord());
 172 }
 173
 174 TEST(BreakIteratorTest, BreakSpacekWide16) {
 175   // Two Greek words.
 176   const string16 str(WideToUTF16(
 177       L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9"
 178       L"\x03bf\x03c2\x0020\x0399\x03c3\x03c4\x03cc\x03c2"));
 179   const string16 word1(str.substr(0, 11));
 180   const string16 word2(str.substr(11, 5));
 181   BreakIterator iter(str, BreakIterator::BREAK_SPACE);
 182   ASSERT_TRUE(iter.Init());
 183   EXPECT_TRUE(iter.Advance());
 184   EXPECT_FALSE(iter.IsWord());
 185   EXPECT_EQ(word1, iter.GetString());
 186   EXPECT_TRUE(iter.Advance());
 187   EXPECT_FALSE(iter.IsWord());
 188   EXPECT_EQ(word2, iter.GetString());
 189   EXPECT_FALSE(iter.Advance());
 190   EXPECT_FALSE(iter.IsWord());
 191   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
 192   EXPECT_FALSE(iter.IsWord());
 193 }
 194
 195 TEST(BreakIteratorTest, BreakSpaceWide32) {
 196   // U+1D49C MATHEMATICAL SCRIPT CAPITAL A
 197   const char very_wide_char[] = "\xF0\x9D\x92\x9C";
 198   const string16 str(
 199       UTF8ToUTF16(base::StringPrintf("%s a", very_wide_char)));
 200   const string16 very_wide_word(str.substr(0, 3));
 201
 202   BreakIterator iter(str, BreakIterator::BREAK_SPACE);
 203   ASSERT_TRUE(iter.Init());
 204   EXPECT_TRUE(iter.Advance());
 205   EXPECT_FALSE(iter.IsWord());
 206   EXPECT_EQ(very_wide_word, iter.GetString());
 207   EXPECT_TRUE(iter.Advance());
 208   EXPECT_FALSE(iter.IsWord());
 209   EXPECT_EQ(UTF8ToUTF16("a"), iter.GetString());
 210   EXPECT_FALSE(iter.Advance());
 211   EXPECT_FALSE(iter.IsWord());
 212   EXPECT_FALSE(iter.Advance());  // Test unexpected advance after end.
 213   EXPECT_FALSE(iter.IsWord());
 214 }
 215
 216 TEST(BreakIteratorTest, BreakLineEmpty) {
 217   string16 empty;
 218   BreakIterator iter(empty, BreakIterator::BREAK_NEWLINE);
 219   ASSERT_TRUE(iter.Init());
 220   EXPECT_FALSE(iter.Advance());
 221   EXPECT_FALSE(iter.IsWord());
 222   EXPECT_FALSE(iter.Advance());   // Test unexpected advance after end.
 223   EXPECT_FALSE(iter.IsWord());
 224 }
 225
 226 TEST(BreakIteratorTest, BreakLine) {
 227   string16 nl(UTF8ToUTF16("\n"));
 228   string16 str(UTF8ToUTF16("\nfoo bar!\n\npouet boom"));
 229   BreakIterator iter(str, BreakIterator::BREAK_NEWLINE);
 230   ASSERT_TRUE(iter.Init());
 231   EXPECT_TRUE(iter.Advance());
 232   EXPECT_FALSE(iter.IsWord());
 233   EXPECT_EQ(nl, iter.GetString());
 234   EXPECT_TRUE(iter.Advance());
 235   EXPECT_FALSE(iter.IsWord());
 236   EXPECT_EQ(UTF8ToUTF16("foo bar!\n"), iter.GetString());
 237   EXPECT_TRUE(iter.Advance());
 238   EXPECT_FALSE(iter.IsWord());
 239   EXPECT_EQ(nl, iter.GetString());
 240   EXPECT_TRUE(iter.Advance());
 241   EXPECT_FALSE(iter.IsWord());
 242   EXPECT_EQ(UTF8ToUTF16("pouet boom"), iter.GetString());
 243   EXPECT_FALSE(iter.Advance());
 244   EXPECT_FALSE(iter.IsWord());
 245   EXPECT_FALSE(iter.Advance());   // Test unexpected advance after end.
 246   EXPECT_FALSE(iter.IsWord());
 247 }
 248
 249 TEST(BreakIteratorTest, BreakLineNL) {
 250   string16 nl(UTF8ToUTF16("\n"));
 251   string16 str(UTF8ToUTF16("\nfoo bar!\n\npouet boom\n"));
 252   BreakIterator iter(str, BreakIterator::BREAK_NEWLINE);
 253   ASSERT_TRUE(iter.Init());
 254   EXPECT_TRUE(iter.Advance());
 255   EXPECT_FALSE(iter.IsWord());
 256   EXPECT_EQ(nl, iter.GetString());
 257   EXPECT_TRUE(iter.Advance());
 258   EXPECT_FALSE(iter.IsWord());
 259   EXPECT_EQ(UTF8ToUTF16("foo bar!\n"), iter.GetString());
 260   EXPECT_TRUE(iter.Advance());
 261   EXPECT_FALSE(iter.IsWord());
 262   EXPECT_EQ(nl, iter.GetString());
 263   EXPECT_TRUE(iter.Advance());
 264   EXPECT_FALSE(iter.IsWord());
 265   EXPECT_EQ(UTF8ToUTF16("pouet boom\n"), iter.GetString());
 266   EXPECT_FALSE(iter.Advance());
 267   EXPECT_FALSE(iter.IsWord());
 268   EXPECT_FALSE(iter.Advance());   // Test unexpected advance after end.
 269   EXPECT_FALSE(iter.IsWord());
 270 }
 271
 272 TEST(BreakIteratorTest, BreakLineWide16) {
 273   // Two Greek words separated by newline.
 274   const string16 str(WideToUTF16(
 275       L"\x03a0\x03b1\x03b3\x03ba\x03cc\x03c3\x03bc\x03b9"
 276       L"\x03bf\x03c2\x000a\x0399\x03c3\x03c4\x03cc\x03c2"));
 277   const string16 line1(str.substr(0, 11));
 278   const string16 line2(str.substr(11, 5));
 279   BreakIterator iter(str, BreakIterator::BREAK_NEWLINE);
 280   ASSERT_TRUE(iter.Init());
 281   EXPECT_TRUE(iter.Advance());
 282   EXPECT_FALSE(iter.IsWord());
 283   EXPECT_EQ(line1, iter.GetString());
 284   EXPECT_TRUE(iter.Advance());
 285   EXPECT_FALSE(iter.IsWord());
 286   EXPECT_EQ(line2, iter.GetString());
 287   EXPECT_FALSE(iter.Advance());
 288   EXPECT_FALSE(iter.IsWord());
 289   EXPECT_FALSE(iter.Advance());   // Test unexpected advance after end.
 290   EXPECT_FALSE(iter.IsWord());
 291 }
 292
 293 TEST(BreakIteratorTest, BreakLineWide32) {
 294   // U+1D49C MATHEMATICAL SCRIPT CAPITAL A
 295   const char very_wide_char[] = "\xF0\x9D\x92\x9C";
 296   const string16 str(
 297       UTF8ToUTF16(base::StringPrintf("%s\na", very_wide_char)));
 298   const string16 very_wide_line(str.substr(0, 3));
 299   BreakIterator iter(str, BreakIterator::BREAK_NEWLINE);
 300   ASSERT_TRUE(iter.Init());
 301   EXPECT_TRUE(iter.Advance());
 302   EXPECT_FALSE(iter.IsWord());
 303   EXPECT_EQ(very_wide_line, iter.GetString());
 304   EXPECT_TRUE(iter.Advance());
 305   EXPECT_FALSE(iter.IsWord());
 306   EXPECT_EQ(UTF8ToUTF16("a"), iter.GetString());
 307   EXPECT_FALSE(iter.Advance());
 308   EXPECT_FALSE(iter.IsWord());
 309   EXPECT_FALSE(iter.Advance());   // Test unexpected advance after end.
 310   EXPECT_FALSE(iter.IsWord());
 311 }
 312
 313 TEST(BreakIteratorTest, BreakCharacter) {
 314   static const wchar_t* kCharacters[] = {
 315     // An English word consisting of four ASCII characters.
 316     L"w", L"o", L"r", L"d", L" ",
 317     // A Hindi word (which means "Hindi") consisting of three Devanagari
 318     // characters.
 319     L"\x0939\x093F", L"\x0928\x094D", L"\x0926\x0940", L" ",
 320     // A Thai word (which means "feel") consisting of three Thai characters.
 321     L"\x0E23\x0E39\x0E49", L"\x0E2A\x0E36", L"\x0E01", L" ",
 322   };
 323   std::vector<string16> characters;
 324   string16 text;
 325   for (size_t i = 0; i < arraysize(kCharacters); ++i) {
 326     characters.push_back(WideToUTF16(kCharacters[i]));
 327     text.append(characters.back());
 328   }
 329   BreakIterator iter(text, BreakIterator::BREAK_CHARACTER);
 330   ASSERT_TRUE(iter.Init());
 331   for (size_t i = 0; i < arraysize(kCharacters); ++i) {
 332     EXPECT_TRUE(iter.Advance());
 333     EXPECT_EQ(characters[i], iter.GetString());
 334   }
 335 }
 336
 337 // Test for https://code.google.com/p/chromium/issues/detail?id=411213
 338 // We should be able to get valid substrings with GetString() function
 339 // after setting new content by calling SetText().
 340 TEST(BreakIteratorTest, GetStringAfterSetText) {
 341   const string16 initial_string(ASCIIToUTF16("str"));
 342   BreakIterator iter(initial_string, BreakIterator::BREAK_WORD);
 343   ASSERT_TRUE(iter.Init());
 344
 345   const string16 long_string(ASCIIToUTF16("another,string"));
 346   EXPECT_TRUE(iter.SetText(long_string.c_str(), long_string.size()));
 347   EXPECT_TRUE(iter.Advance());
 348   EXPECT_TRUE(iter.Advance());  // Advance to ',' in |long_string|
 349
 350   // Check that the current position is out of bounds of the |initial_string|.
 351   EXPECT_LT(initial_string.size(), iter.pos());
 352
 353   // Check that we can get a valid substring of |long_string|.
 354   EXPECT_EQ(ASCIIToUTF16(","), iter.GetString());
 355 }
 356
 357 TEST(BreakIteratorTest, GetStringPiece) {
 358   const string16 initial_string(ASCIIToUTF16("some string"));
 359   BreakIterator iter(initial_string, BreakIterator::BREAK_WORD);
 360   ASSERT_TRUE(iter.Init());
 361
 362   EXPECT_TRUE(iter.Advance());
 363   EXPECT_EQ(iter.GetString(), iter.GetStringPiece().as_string());
 364   EXPECT_EQ(StringPiece16(ASCIIToUTF16("some")), iter.GetStringPiece());
 365
 366   EXPECT_TRUE(iter.Advance());
 367   EXPECT_TRUE(iter.Advance());
 368   EXPECT_EQ(iter.GetString(), iter.GetStringPiece().as_string());
 369   EXPECT_EQ(StringPiece16(ASCIIToUTF16("string")), iter.GetStringPiece());
 370 }
 371
 372 }  // namespace i18n
 373 }  // namespace base