ax_text_utils_unittest.cc 13 KB

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  1. // Copyright 2014 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. #include "ui/accessibility/ax_text_utils.h"
  5. #include <stddef.h>
  6. #include <utility>
  7. #include "base/strings/utf_string_conversions.h"
  8. #include "testing/gmock/include/gmock/gmock.h"
  9. #include "testing/gtest/include/gtest/gtest.h"
  10. #include "ui/accessibility/ax_enums.mojom.h"
  11. namespace ui {
  12. TEST(AXTextUtils, FindAccessibleTextBoundaryWord) {
  13. const std::u16string text = u"Hello there.This/is\ntesting.";
  14. const size_t text_length = text.length();
  15. std::vector<int> line_start_offsets;
  16. line_start_offsets.push_back(19);
  17. size_t result;
  18. result = FindAccessibleTextBoundary(
  19. text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 0,
  20. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  21. EXPECT_EQ(6UL, result);
  22. result = FindAccessibleTextBoundary(text, line_start_offsets,
  23. ax::mojom::TextBoundary::kWordStart, 5,
  24. ax::mojom::MoveDirection::kBackward,
  25. ax::mojom::TextAffinity::kDownstream);
  26. EXPECT_EQ(0UL, result);
  27. result = FindAccessibleTextBoundary(
  28. text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 6,
  29. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  30. EXPECT_EQ(12UL, result);
  31. result = FindAccessibleTextBoundary(text, line_start_offsets,
  32. ax::mojom::TextBoundary::kWordStart, 11,
  33. ax::mojom::MoveDirection::kBackward,
  34. ax::mojom::TextAffinity::kDownstream);
  35. EXPECT_EQ(6UL, result);
  36. result = FindAccessibleTextBoundary(text, line_start_offsets,
  37. ax::mojom::TextBoundary::kWordStart, 12,
  38. ax::mojom::MoveDirection::kBackward,
  39. ax::mojom::TextAffinity::kDownstream);
  40. EXPECT_EQ(12UL, result);
  41. result = FindAccessibleTextBoundary(
  42. text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 15,
  43. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  44. EXPECT_EQ(17UL, result);
  45. result = FindAccessibleTextBoundary(text, line_start_offsets,
  46. ax::mojom::TextBoundary::kWordStart, 15,
  47. ax::mojom::MoveDirection::kBackward,
  48. ax::mojom::TextAffinity::kDownstream);
  49. EXPECT_EQ(12UL, result);
  50. result = FindAccessibleTextBoundary(
  51. text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 16,
  52. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  53. EXPECT_EQ(17UL, result);
  54. result = FindAccessibleTextBoundary(
  55. text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 17,
  56. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  57. EXPECT_EQ(20UL, result);
  58. result = FindAccessibleTextBoundary(
  59. text, line_start_offsets, ax::mojom::TextBoundary::kWordStart, 20,
  60. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  61. EXPECT_EQ(text_length, result);
  62. result = FindAccessibleTextBoundary(
  63. text, line_start_offsets, ax::mojom::TextBoundary::kWordStart,
  64. text_length, ax::mojom::MoveDirection::kBackward,
  65. ax::mojom::TextAffinity::kDownstream);
  66. EXPECT_EQ(20UL, result);
  67. }
  68. TEST(AXTextUtils, FindAccessibleTextBoundaryLine) {
  69. const std::u16string text = u"Line 1.\nLine 2\n\t";
  70. const size_t text_length = text.length();
  71. std::vector<int> line_start_offsets;
  72. line_start_offsets.push_back(8);
  73. line_start_offsets.push_back(15);
  74. size_t result;
  75. // Basic cases.
  76. result = FindAccessibleTextBoundary(
  77. text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 5,
  78. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  79. EXPECT_EQ(8UL, result);
  80. result = FindAccessibleTextBoundary(text, line_start_offsets,
  81. ax::mojom::TextBoundary::kLineStart, 9,
  82. ax::mojom::MoveDirection::kBackward,
  83. ax::mojom::TextAffinity::kDownstream);
  84. EXPECT_EQ(8UL, result);
  85. result = FindAccessibleTextBoundary(
  86. text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 10,
  87. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  88. EXPECT_EQ(15UL, result);
  89. // Edge cases.
  90. result = FindAccessibleTextBoundary(
  91. text, line_start_offsets, ax::mojom::TextBoundary::kLineStart,
  92. text_length, ax::mojom::MoveDirection::kBackward,
  93. ax::mojom::TextAffinity::kDownstream);
  94. EXPECT_EQ(15UL, result);
  95. // When the start_offset is at the start of the next line and we are searching
  96. // backwards, it should not move.
  97. result = FindAccessibleTextBoundary(text, line_start_offsets,
  98. ax::mojom::TextBoundary::kLineStart, 15,
  99. ax::mojom::MoveDirection::kBackward,
  100. ax::mojom::TextAffinity::kDownstream);
  101. EXPECT_EQ(15UL, result);
  102. // When the start_offset is at a hard line break and we are searching
  103. // backwards, it should return the start of the previous line.
  104. result = FindAccessibleTextBoundary(text, line_start_offsets,
  105. ax::mojom::TextBoundary::kLineStart, 14,
  106. ax::mojom::MoveDirection::kBackward,
  107. ax::mojom::TextAffinity::kDownstream);
  108. EXPECT_EQ(8UL, result);
  109. // When the start_offset is at the start of a line and we are searching
  110. // forwards, it should return the start of the next line.
  111. result = FindAccessibleTextBoundary(
  112. text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 8,
  113. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  114. EXPECT_EQ(15UL, result);
  115. // When there is no previous line break and we are searching backwards,
  116. // it should return 0.
  117. result = FindAccessibleTextBoundary(text, line_start_offsets,
  118. ax::mojom::TextBoundary::kLineStart, 4,
  119. ax::mojom::MoveDirection::kBackward,
  120. ax::mojom::TextAffinity::kDownstream);
  121. EXPECT_EQ(0UL, result);
  122. // When we are at the start of the last line and we are searching forwards.
  123. // it should return the text length.
  124. result = FindAccessibleTextBoundary(
  125. text, line_start_offsets, ax::mojom::TextBoundary::kLineStart, 15,
  126. ax::mojom::MoveDirection::kForward, ax::mojom::TextAffinity::kDownstream);
  127. EXPECT_EQ(text_length, result);
  128. }
  129. TEST(AXTextUtils, FindAccessibleTextBoundarySentence) {
  130. auto find_sentence_boundaries_at_offset = [](const std::u16string& text,
  131. int offset) {
  132. std::vector<int> line_start_offsets;
  133. size_t backwards = FindAccessibleTextBoundary(
  134. text, line_start_offsets, ax::mojom::TextBoundary::kSentenceStart,
  135. offset, ax::mojom::MoveDirection::kBackward,
  136. ax::mojom::TextAffinity::kDownstream);
  137. size_t forwards = FindAccessibleTextBoundary(
  138. text, line_start_offsets, ax::mojom::TextBoundary::kSentenceStart,
  139. offset, ax::mojom::MoveDirection::kForward,
  140. ax::mojom::TextAffinity::kDownstream);
  141. return std::make_pair(backwards, forwards);
  142. };
  143. const std::u16string text =
  144. u"Sentence 1. Sentence 2...\n\tSentence 3! Sentence 4";
  145. std::pair<size_t, size_t> boundaries =
  146. find_sentence_boundaries_at_offset(text, 5);
  147. EXPECT_EQ(0UL, boundaries.first);
  148. EXPECT_EQ(12UL, boundaries.second);
  149. // When a sentence ends with multiple punctuation, we should look for the
  150. // first word character that follows.
  151. boundaries = find_sentence_boundaries_at_offset(text, 16);
  152. EXPECT_EQ(12UL, boundaries.first);
  153. EXPECT_EQ(27UL, boundaries.second);
  154. // This is also true if we start in the middle of that punctuation.
  155. boundaries = find_sentence_boundaries_at_offset(text, 23);
  156. EXPECT_EQ(12UL, boundaries.first);
  157. EXPECT_EQ(27UL, boundaries.second);
  158. // When the offset is in the whitespace between two sentences, the boundaries
  159. // should be those of the previous sentence to the beginning of the first
  160. // non-whitespace character of the next one.
  161. boundaries = find_sentence_boundaries_at_offset(text, 38);
  162. EXPECT_EQ(27UL, boundaries.first);
  163. EXPECT_EQ(39UL, boundaries.second);
  164. // The end of the string should be considered the end of the last sentence
  165. // regardless of whether or not there is punctuation.
  166. boundaries = find_sentence_boundaries_at_offset(text, 44);
  167. EXPECT_EQ(39UL, boundaries.first);
  168. EXPECT_EQ(49UL, boundaries.second);
  169. // The sentence should include whitespace all the way until the end of the
  170. // string.
  171. const std::u16string text2 = u"A sentence . \n\n\t\t\n";
  172. boundaries = find_sentence_boundaries_at_offset(text2, 10);
  173. EXPECT_EQ(0UL, boundaries.first);
  174. EXPECT_EQ(18UL, boundaries.second);
  175. }
  176. TEST(AXTextUtils, FindAccessibleTextBoundaryCharacter) {
  177. static const wchar_t* kCharacters[] = {
  178. // An English word consisting of four ASCII characters.
  179. L"w",
  180. L"o",
  181. L"r",
  182. L"d",
  183. L" ",
  184. // A Hindi word (which means "Hindi") consisting of three Devanagari
  185. // characters.
  186. L"\x0939\x093F",
  187. L"\x0928\x094D",
  188. L"\x0926\x0940",
  189. L" ",
  190. // A Thai word (which means "feel") consisting of three Thai characters.
  191. L"\x0E23\x0E39\x0E49",
  192. L"\x0E2A\x0E36",
  193. L"\x0E01",
  194. L" ",
  195. };
  196. std::vector<std::u16string> characters;
  197. std::u16string text;
  198. for (auto*& i : kCharacters) {
  199. characters.push_back(base::WideToUTF16(i));
  200. text.append(characters.back());
  201. }
  202. auto verify_boundaries_at_offset = [&text](int offset, size_t start,
  203. size_t end) {
  204. testing::Message message;
  205. message << "Testing character bounds at index " << offset;
  206. SCOPED_TRACE(message);
  207. std::vector<int> line_start_offsets;
  208. size_t backwards = FindAccessibleTextBoundary(
  209. text, line_start_offsets, ax::mojom::TextBoundary::kCharacter, offset,
  210. ax::mojom::MoveDirection::kBackward,
  211. ax::mojom::TextAffinity::kDownstream);
  212. EXPECT_EQ(backwards, start);
  213. size_t forwards = FindAccessibleTextBoundary(
  214. text, line_start_offsets, ax::mojom::TextBoundary::kCharacter, offset,
  215. ax::mojom::MoveDirection::kForward,
  216. ax::mojom::TextAffinity::kDownstream);
  217. EXPECT_EQ(forwards, end);
  218. };
  219. verify_boundaries_at_offset(0, 0UL, 1UL);
  220. verify_boundaries_at_offset(1, 1UL, 2UL);
  221. verify_boundaries_at_offset(2, 2UL, 3UL);
  222. verify_boundaries_at_offset(3, 3UL, 4UL);
  223. verify_boundaries_at_offset(4, 4UL, 5UL);
  224. verify_boundaries_at_offset(5, 5UL, 7UL);
  225. verify_boundaries_at_offset(6, 5UL, 7UL);
  226. verify_boundaries_at_offset(7, 7UL, 11UL);
  227. verify_boundaries_at_offset(8, 7UL, 11UL);
  228. verify_boundaries_at_offset(9, 7UL, 11UL);
  229. verify_boundaries_at_offset(10, 7UL, 11UL);
  230. verify_boundaries_at_offset(11, 11L, 12UL);
  231. verify_boundaries_at_offset(12, 12L, 15UL);
  232. verify_boundaries_at_offset(13, 12L, 15UL);
  233. verify_boundaries_at_offset(14, 12L, 15UL);
  234. verify_boundaries_at_offset(15, 15L, 17UL);
  235. verify_boundaries_at_offset(16, 15L, 17UL);
  236. verify_boundaries_at_offset(17, 17L, 18UL);
  237. verify_boundaries_at_offset(18, 18L, 19UL);
  238. }
  239. TEST(AXTextUtils, GetWordOffsetsEmptyTest) {
  240. const std::u16string text = u"";
  241. std::vector<int> word_starts = GetWordStartOffsets(text);
  242. std::vector<int> word_ends = GetWordEndOffsets(text);
  243. EXPECT_EQ(0UL, word_starts.size());
  244. EXPECT_EQ(0UL, word_ends.size());
  245. }
  246. TEST(AXTextUtils, GetWordStartOffsetsBasicTest) {
  247. const std::u16string text = u"This is very simple input";
  248. EXPECT_THAT(GetWordStartOffsets(text), testing::ElementsAre(0, 5, 8, 13, 20));
  249. }
  250. TEST(AXTextUtils, GetWordEndOffsetsBasicTest) {
  251. const std::u16string text = u"This is very simple input";
  252. EXPECT_THAT(GetWordEndOffsets(text), testing::ElementsAre(4, 7, 12, 19, 25));
  253. }
  254. TEST(AXTextUtils, GetWordStartOffsetsMalformedInputTest) {
  255. const std::u16string text =
  256. u"..we *## should parse $#@$ through bad ,, input";
  257. EXPECT_THAT(GetWordStartOffsets(text),
  258. testing::ElementsAre(2, 9, 16, 27, 35, 43));
  259. }
  260. TEST(AXTextUtils, GetSentenceStartOffsetsBasicTest) {
  261. const std::u16string text =
  262. u"This is the first sentence. This is the second sentence";
  263. EXPECT_THAT(GetSentenceStartOffsets(text), testing::ElementsAre(0, 28));
  264. }
  265. TEST(AXTextUtils, GetSentenceEndOffsetsBasicTest) {
  266. const std::u16string text =
  267. u"This is the first sentence. This is the second sentence";
  268. EXPECT_THAT(GetSentenceEndOffsets(text), testing::ElementsAre(28, 55));
  269. }
  270. TEST(AXTextUtils, GetSentenceStartOffsetsMalformedInputTest) {
  271. const std::u16string text = u"is the first ... second.";
  272. EXPECT_THAT(GetSentenceStartOffsets(text), testing::ElementsAre(0));
  273. }
  274. TEST(AXTextUtils, GetSentenceEndOffsetsMalformedInputTest) {
  275. const std::u16string text = u"is the first ... second.";
  276. EXPECT_THAT(GetSentenceEndOffsets(text), testing::ElementsAre(24));
  277. }
  278. } // namespace ui