string_split_unittest.cc 18 KB

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  1. // Copyright (c) 2012 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 "base/strings/string_split.h"
  5. #include <stddef.h>
  6. #include "base/strings/string_util.h"
  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. using ::testing::ElementsAre;
  11. namespace base {
  12. class SplitStringIntoKeyValuePairsTest : public testing::Test {
  13. protected:
  14. base::StringPairs kv_pairs;
  15. };
  16. using SplitStringIntoKeyValuePairsUsingSubstrTest =
  17. SplitStringIntoKeyValuePairsTest;
  18. TEST_F(SplitStringIntoKeyValuePairsUsingSubstrTest, EmptyString) {
  19. EXPECT_TRUE(
  20. SplitStringIntoKeyValuePairsUsingSubstr(std::string(),
  21. ':', // Key-value delimiter
  22. ",", // Key-value pair delimiter
  23. &kv_pairs));
  24. EXPECT_TRUE(kv_pairs.empty());
  25. }
  26. TEST_F(SplitStringIntoKeyValuePairsUsingSubstrTest, MissingKeyValueDelimiter) {
  27. EXPECT_FALSE(
  28. SplitStringIntoKeyValuePairsUsingSubstr("key1,,key2:value2",
  29. ':', // Key-value delimiter
  30. ",,", // Key-value pair delimiter
  31. &kv_pairs));
  32. ASSERT_EQ(2U, kv_pairs.size());
  33. EXPECT_TRUE(kv_pairs[0].first.empty());
  34. EXPECT_TRUE(kv_pairs[0].second.empty());
  35. EXPECT_EQ("key2", kv_pairs[1].first);
  36. EXPECT_EQ("value2", kv_pairs[1].second);
  37. }
  38. TEST_F(SplitStringIntoKeyValuePairsUsingSubstrTest,
  39. MissingKeyValuePairDelimiter) {
  40. EXPECT_TRUE(SplitStringIntoKeyValuePairsUsingSubstr(
  41. "key1:value1,,key3:value3",
  42. ':', // Key-value delimiter
  43. ",,,", // Key-value pair delimiter
  44. &kv_pairs));
  45. ASSERT_EQ(1U, kv_pairs.size());
  46. EXPECT_EQ("key1", kv_pairs[0].first);
  47. EXPECT_EQ("value1,,key3:value3", kv_pairs[0].second);
  48. }
  49. TEST_F(SplitStringIntoKeyValuePairsUsingSubstrTest, UntrimmedWhitespace) {
  50. EXPECT_TRUE(
  51. SplitStringIntoKeyValuePairsUsingSubstr("key1 : value1",
  52. ':', // Key-value delimiter
  53. ",", // Key-value pair delimiter
  54. &kv_pairs));
  55. ASSERT_EQ(1U, kv_pairs.size());
  56. EXPECT_EQ("key1 ", kv_pairs[0].first);
  57. EXPECT_EQ(" value1", kv_pairs[0].second);
  58. }
  59. TEST_F(SplitStringIntoKeyValuePairsUsingSubstrTest, OnlySplitAtGivenSeparator) {
  60. std::string a("a ?!@#$%^&*()_+:/{}\\\t\nb");
  61. EXPECT_TRUE(
  62. SplitStringIntoKeyValuePairsUsingSubstr(a + "X" + a + "XY" + a + "YX" + a,
  63. 'X', // Key-value delimiter
  64. "XY", // Key-value pair delimiter
  65. &kv_pairs));
  66. ASSERT_EQ(2U, kv_pairs.size());
  67. EXPECT_EQ(a, kv_pairs[0].first);
  68. EXPECT_EQ(a, kv_pairs[0].second);
  69. EXPECT_EQ(a + 'Y', kv_pairs[1].first);
  70. EXPECT_EQ(a, kv_pairs[1].second);
  71. }
  72. TEST_F(SplitStringIntoKeyValuePairsTest, EmptyString) {
  73. EXPECT_TRUE(SplitStringIntoKeyValuePairs(std::string(),
  74. ':', // Key-value delimiter
  75. ',', // Key-value pair delimiter
  76. &kv_pairs));
  77. EXPECT_TRUE(kv_pairs.empty());
  78. }
  79. TEST_F(SplitStringIntoKeyValuePairsTest, MissingKeyValueDelimiter) {
  80. EXPECT_FALSE(SplitStringIntoKeyValuePairs("key1,key2:value2",
  81. ':', // Key-value delimiter
  82. ',', // Key-value pair delimiter
  83. &kv_pairs));
  84. ASSERT_EQ(2U, kv_pairs.size());
  85. EXPECT_TRUE(kv_pairs[0].first.empty());
  86. EXPECT_TRUE(kv_pairs[0].second.empty());
  87. EXPECT_EQ("key2", kv_pairs[1].first);
  88. EXPECT_EQ("value2", kv_pairs[1].second);
  89. }
  90. TEST_F(SplitStringIntoKeyValuePairsTest, EmptyKeyWithKeyValueDelimiter) {
  91. EXPECT_TRUE(SplitStringIntoKeyValuePairs(":value1,key2:value2",
  92. ':', // Key-value delimiter
  93. ',', // Key-value pair delimiter
  94. &kv_pairs));
  95. ASSERT_EQ(2U, kv_pairs.size());
  96. EXPECT_TRUE(kv_pairs[0].first.empty());
  97. EXPECT_EQ("value1", kv_pairs[0].second);
  98. EXPECT_EQ("key2", kv_pairs[1].first);
  99. EXPECT_EQ("value2", kv_pairs[1].second);
  100. }
  101. TEST_F(SplitStringIntoKeyValuePairsTest, TrailingAndLeadingPairDelimiter) {
  102. EXPECT_TRUE(SplitStringIntoKeyValuePairs(",key1:value1,key2:value2,",
  103. ':', // Key-value delimiter
  104. ',', // Key-value pair delimiter
  105. &kv_pairs));
  106. ASSERT_EQ(2U, kv_pairs.size());
  107. EXPECT_EQ("key1", kv_pairs[0].first);
  108. EXPECT_EQ("value1", kv_pairs[0].second);
  109. EXPECT_EQ("key2", kv_pairs[1].first);
  110. EXPECT_EQ("value2", kv_pairs[1].second);
  111. }
  112. TEST_F(SplitStringIntoKeyValuePairsTest, EmptyPair) {
  113. EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:value1,,key3:value3",
  114. ':', // Key-value delimiter
  115. ',', // Key-value pair delimiter
  116. &kv_pairs));
  117. ASSERT_EQ(2U, kv_pairs.size());
  118. EXPECT_EQ("key1", kv_pairs[0].first);
  119. EXPECT_EQ("value1", kv_pairs[0].second);
  120. EXPECT_EQ("key3", kv_pairs[1].first);
  121. EXPECT_EQ("value3", kv_pairs[1].second);
  122. }
  123. TEST_F(SplitStringIntoKeyValuePairsTest, EmptyValue) {
  124. EXPECT_FALSE(SplitStringIntoKeyValuePairs("key1:,key2:value2",
  125. ':', // Key-value delimiter
  126. ',', // Key-value pair delimiter
  127. &kv_pairs));
  128. ASSERT_EQ(2U, kv_pairs.size());
  129. EXPECT_EQ("key1", kv_pairs[0].first);
  130. EXPECT_EQ("", kv_pairs[0].second);
  131. EXPECT_EQ("key2", kv_pairs[1].first);
  132. EXPECT_EQ("value2", kv_pairs[1].second);
  133. }
  134. TEST_F(SplitStringIntoKeyValuePairsTest, UntrimmedWhitespace) {
  135. EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1 : value1",
  136. ':', // Key-value delimiter
  137. ',', // Key-value pair delimiter
  138. &kv_pairs));
  139. ASSERT_EQ(1U, kv_pairs.size());
  140. EXPECT_EQ("key1 ", kv_pairs[0].first);
  141. EXPECT_EQ(" value1", kv_pairs[0].second);
  142. }
  143. TEST_F(SplitStringIntoKeyValuePairsTest, TrimmedWhitespace) {
  144. EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:value1 , key2:value2",
  145. ':', // Key-value delimiter
  146. ',', // Key-value pair delimiter
  147. &kv_pairs));
  148. ASSERT_EQ(2U, kv_pairs.size());
  149. EXPECT_EQ("key1", kv_pairs[0].first);
  150. EXPECT_EQ("value1", kv_pairs[0].second);
  151. EXPECT_EQ("key2", kv_pairs[1].first);
  152. EXPECT_EQ("value2", kv_pairs[1].second);
  153. }
  154. TEST_F(SplitStringIntoKeyValuePairsTest, MultipleKeyValueDelimiters) {
  155. EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:::value1,key2:value2",
  156. ':', // Key-value delimiter
  157. ',', // Key-value pair delimiter
  158. &kv_pairs));
  159. ASSERT_EQ(2U, kv_pairs.size());
  160. EXPECT_EQ("key1", kv_pairs[0].first);
  161. EXPECT_EQ("value1", kv_pairs[0].second);
  162. EXPECT_EQ("key2", kv_pairs[1].first);
  163. EXPECT_EQ("value2", kv_pairs[1].second);
  164. }
  165. TEST_F(SplitStringIntoKeyValuePairsTest, OnlySplitAtGivenSeparator) {
  166. std::string a("a ?!@#$%^&*()_+:/{}\\\t\nb");
  167. EXPECT_TRUE(SplitStringIntoKeyValuePairs(a + "X" + a + "Y" + a + "X" + a,
  168. 'X', // Key-value delimiter
  169. 'Y', // Key-value pair delimiter
  170. &kv_pairs));
  171. ASSERT_EQ(2U, kv_pairs.size());
  172. EXPECT_EQ(a, kv_pairs[0].first);
  173. EXPECT_EQ(a, kv_pairs[0].second);
  174. EXPECT_EQ(a, kv_pairs[1].first);
  175. EXPECT_EQ(a, kv_pairs[1].second);
  176. }
  177. TEST_F(SplitStringIntoKeyValuePairsTest, DelimiterInValue) {
  178. EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:va:ue1,key2:value2",
  179. ':', // Key-value delimiter
  180. ',', // Key-value pair delimiter
  181. &kv_pairs));
  182. ASSERT_EQ(2U, kv_pairs.size());
  183. EXPECT_EQ("key1", kv_pairs[0].first);
  184. EXPECT_EQ("va:ue1", kv_pairs[0].second);
  185. EXPECT_EQ("key2", kv_pairs[1].first);
  186. EXPECT_EQ("value2", kv_pairs[1].second);
  187. }
  188. TEST(SplitStringUsingSubstrTest, EmptyString) {
  189. std::vector<std::string> results = SplitStringUsingSubstr(
  190. std::string(), "DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
  191. ASSERT_EQ(1u, results.size());
  192. EXPECT_THAT(results, ElementsAre(""));
  193. }
  194. TEST(SplitStringUsingSubstrTest, EmptyDelimiter) {
  195. std::vector<std::string> results = SplitStringUsingSubstr(
  196. "TEST", std::string(), TRIM_WHITESPACE, SPLIT_WANT_ALL);
  197. ASSERT_EQ(1u, results.size());
  198. EXPECT_THAT(results, ElementsAre("TEST"));
  199. }
  200. TEST(StringUtilTest, SplitString_Basics) {
  201. std::vector<std::string> r;
  202. r = SplitString(std::string(), ",:;", KEEP_WHITESPACE, SPLIT_WANT_ALL);
  203. EXPECT_TRUE(r.empty());
  204. // Empty separator list
  205. r = SplitString("hello, world", "", KEEP_WHITESPACE, SPLIT_WANT_ALL);
  206. ASSERT_EQ(1u, r.size());
  207. EXPECT_EQ("hello, world", r[0]);
  208. // Should split on any of the separators.
  209. r = SplitString("::,,;;", ",:;", KEEP_WHITESPACE, SPLIT_WANT_ALL);
  210. ASSERT_EQ(7u, r.size());
  211. for (auto str : r)
  212. ASSERT_TRUE(str.empty());
  213. r = SplitString("red, green; blue:", ",:;", TRIM_WHITESPACE,
  214. SPLIT_WANT_NONEMPTY);
  215. ASSERT_EQ(3u, r.size());
  216. EXPECT_EQ("red", r[0]);
  217. EXPECT_EQ("green", r[1]);
  218. EXPECT_EQ("blue", r[2]);
  219. // Want to split a string along whitespace sequences.
  220. r = SplitString(" red green \tblue\n", " \t\n", TRIM_WHITESPACE,
  221. SPLIT_WANT_NONEMPTY);
  222. ASSERT_EQ(3u, r.size());
  223. EXPECT_EQ("red", r[0]);
  224. EXPECT_EQ("green", r[1]);
  225. EXPECT_EQ("blue", r[2]);
  226. // Weird case of splitting on spaces but not trimming.
  227. r = SplitString(" red ", " ", TRIM_WHITESPACE, SPLIT_WANT_ALL);
  228. ASSERT_EQ(3u, r.size());
  229. EXPECT_EQ("", r[0]); // Before the first space.
  230. EXPECT_EQ("red", r[1]);
  231. EXPECT_EQ("", r[2]); // After the last space.
  232. }
  233. TEST(StringUtilTest, SplitString_WhitespaceAndResultType) {
  234. std::vector<std::string> r;
  235. // Empty input handling.
  236. r = SplitString(std::string(), ",", KEEP_WHITESPACE, SPLIT_WANT_ALL);
  237. EXPECT_TRUE(r.empty());
  238. r = SplitString(std::string(), ",", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY);
  239. EXPECT_TRUE(r.empty());
  240. // Input string is space and we're trimming.
  241. r = SplitString(" ", ",", TRIM_WHITESPACE, SPLIT_WANT_ALL);
  242. ASSERT_EQ(1u, r.size());
  243. EXPECT_EQ("", r[0]);
  244. r = SplitString(" ", ",", TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
  245. EXPECT_TRUE(r.empty());
  246. // Test all 4 combinations of flags on ", ,".
  247. r = SplitString(", ,", ",", KEEP_WHITESPACE, SPLIT_WANT_ALL);
  248. ASSERT_EQ(3u, r.size());
  249. EXPECT_EQ("", r[0]);
  250. EXPECT_EQ(" ", r[1]);
  251. EXPECT_EQ("", r[2]);
  252. r = SplitString(", ,", ",", KEEP_WHITESPACE, SPLIT_WANT_NONEMPTY);
  253. ASSERT_EQ(1u, r.size());
  254. ASSERT_EQ(" ", r[0]);
  255. r = SplitString(", ,", ",", TRIM_WHITESPACE, SPLIT_WANT_ALL);
  256. ASSERT_EQ(3u, r.size());
  257. EXPECT_EQ("", r[0]);
  258. EXPECT_EQ("", r[1]);
  259. EXPECT_EQ("", r[2]);
  260. r = SplitString(", ,", ",", TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
  261. ASSERT_TRUE(r.empty());
  262. }
  263. TEST(SplitStringUsingSubstrTest, StringWithNoDelimiter) {
  264. std::vector<std::string> results = SplitStringUsingSubstr(
  265. "alongwordwithnodelimiter", "DELIMITER", TRIM_WHITESPACE,
  266. SPLIT_WANT_ALL);
  267. ASSERT_EQ(1u, results.size());
  268. EXPECT_THAT(results, ElementsAre("alongwordwithnodelimiter"));
  269. }
  270. TEST(SplitStringUsingSubstrTest, LeadingDelimitersSkipped) {
  271. std::vector<std::string> results = SplitStringUsingSubstr(
  272. "DELIMITERDELIMITERDELIMITERoneDELIMITERtwoDELIMITERthree",
  273. "DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
  274. ASSERT_EQ(6u, results.size());
  275. EXPECT_THAT(results, ElementsAre("", "", "", "one", "two", "three"));
  276. }
  277. TEST(SplitStringUsingSubstrTest, ConsecutiveDelimitersSkipped) {
  278. std::vector<std::string> results = SplitStringUsingSubstr(
  279. "unoDELIMITERDELIMITERDELIMITERdosDELIMITERtresDELIMITERDELIMITERcuatro",
  280. "DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
  281. ASSERT_EQ(7u, results.size());
  282. EXPECT_THAT(results, ElementsAre("uno", "", "", "dos", "tres", "", "cuatro"));
  283. }
  284. TEST(SplitStringUsingSubstrTest, TrailingDelimitersSkipped) {
  285. std::vector<std::string> results = SplitStringUsingSubstr(
  286. "unDELIMITERdeuxDELIMITERtroisDELIMITERquatreDELIMITERDELIMITERDELIMITER",
  287. "DELIMITER", TRIM_WHITESPACE, SPLIT_WANT_ALL);
  288. ASSERT_EQ(7u, results.size());
  289. EXPECT_THAT(
  290. results, ElementsAre("un", "deux", "trois", "quatre", "", "", ""));
  291. }
  292. TEST(SplitStringPieceUsingSubstrTest, StringWithNoDelimiter) {
  293. std::vector<base::StringPiece> results =
  294. SplitStringPieceUsingSubstr("alongwordwithnodelimiter", "DELIMITER",
  295. base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  296. ASSERT_EQ(1u, results.size());
  297. EXPECT_THAT(results, ElementsAre("alongwordwithnodelimiter"));
  298. }
  299. TEST(SplitStringPieceUsingSubstrTest, LeadingDelimitersSkipped) {
  300. std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
  301. "DELIMITERDELIMITERDELIMITERoneDELIMITERtwoDELIMITERthree", "DELIMITER",
  302. base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  303. ASSERT_EQ(6u, results.size());
  304. EXPECT_THAT(results, ElementsAre("", "", "", "one", "two", "three"));
  305. }
  306. TEST(SplitStringPieceUsingSubstrTest, ConsecutiveDelimitersSkipped) {
  307. std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
  308. "unoDELIMITERDELIMITERDELIMITERdosDELIMITERtresDELIMITERDELIMITERcuatro",
  309. "DELIMITER", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  310. ASSERT_EQ(7u, results.size());
  311. EXPECT_THAT(results, ElementsAre("uno", "", "", "dos", "tres", "", "cuatro"));
  312. }
  313. TEST(SplitStringPieceUsingSubstrTest, TrailingDelimitersSkipped) {
  314. std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
  315. "unDELIMITERdeuxDELIMITERtroisDELIMITERquatreDELIMITERDELIMITERDELIMITER",
  316. "DELIMITER", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  317. ASSERT_EQ(7u, results.size());
  318. EXPECT_THAT(results,
  319. ElementsAre("un", "deux", "trois", "quatre", "", "", ""));
  320. }
  321. TEST(SplitStringPieceUsingSubstrTest, KeepWhitespace) {
  322. std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
  323. "un DELIMITERdeux\tDELIMITERtrois\nDELIMITERquatre", "DELIMITER",
  324. base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
  325. ASSERT_EQ(4u, results.size());
  326. EXPECT_THAT(results, ElementsAre("un ", "deux\t", "trois\n", "quatre"));
  327. }
  328. TEST(SplitStringPieceUsingSubstrTest, TrimWhitespace) {
  329. std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
  330. "un DELIMITERdeux\tDELIMITERtrois\nDELIMITERquatre", "DELIMITER",
  331. base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  332. ASSERT_EQ(4u, results.size());
  333. EXPECT_THAT(results, ElementsAre("un", "deux", "trois", "quatre"));
  334. }
  335. TEST(SplitStringPieceUsingSubstrTest, SplitWantAll) {
  336. std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
  337. "unDELIMITERdeuxDELIMITERtroisDELIMITERDELIMITER", "DELIMITER",
  338. base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  339. ASSERT_EQ(5u, results.size());
  340. EXPECT_THAT(results, ElementsAre("un", "deux", "trois", "", ""));
  341. }
  342. TEST(SplitStringPieceUsingSubstrTest, SplitWantNonEmpty) {
  343. std::vector<base::StringPiece> results = SplitStringPieceUsingSubstr(
  344. "unDELIMITERdeuxDELIMITERtroisDELIMITERDELIMITER", "DELIMITER",
  345. base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
  346. ASSERT_EQ(3u, results.size());
  347. EXPECT_THAT(results, ElementsAre("un", "deux", "trois"));
  348. }
  349. TEST(StringSplitTest, StringSplitKeepWhitespace) {
  350. std::vector<std::string> r;
  351. r = SplitString(" ", "*", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
  352. ASSERT_EQ(1U, r.size());
  353. EXPECT_EQ(r[0], " ");
  354. r = SplitString("\t \ta\t ", "\t", base::KEEP_WHITESPACE,
  355. base::SPLIT_WANT_ALL);
  356. ASSERT_EQ(4U, r.size());
  357. EXPECT_EQ(r[0], "");
  358. EXPECT_EQ(r[1], " ");
  359. EXPECT_EQ(r[2], "a");
  360. EXPECT_EQ(r[3], " ");
  361. r = SplitString("\ta\t\nb\tcc", "\n", base::KEEP_WHITESPACE,
  362. base::SPLIT_WANT_ALL);
  363. ASSERT_EQ(2U, r.size());
  364. EXPECT_EQ(r[0], "\ta\t");
  365. EXPECT_EQ(r[1], "b\tcc");
  366. }
  367. TEST(StringSplitTest, SplitStringAlongWhitespace) {
  368. struct TestData {
  369. const char* input;
  370. const size_t expected_result_count;
  371. const char* output1;
  372. const char* output2;
  373. } data[] = {
  374. { "a", 1, "a", "" },
  375. { " ", 0, "", "" },
  376. { " a", 1, "a", "" },
  377. { " ab ", 1, "ab", "" },
  378. { " ab c", 2, "ab", "c" },
  379. { " ab c ", 2, "ab", "c" },
  380. { " ab cd", 2, "ab", "cd" },
  381. { " ab cd ", 2, "ab", "cd" },
  382. { " \ta\t", 1, "a", "" },
  383. { " b\ta\t", 2, "b", "a" },
  384. { " b\tat", 2, "b", "at" },
  385. { "b\tat", 2, "b", "at" },
  386. { "b\t at", 2, "b", "at" },
  387. };
  388. for (const auto& i : data) {
  389. std::vector<std::string> results =
  390. base::SplitString(i.input, kWhitespaceASCII, base::KEEP_WHITESPACE,
  391. base::SPLIT_WANT_NONEMPTY);
  392. ASSERT_EQ(i.expected_result_count, results.size());
  393. if (i.expected_result_count > 0)
  394. ASSERT_EQ(i.output1, results[0]);
  395. if (i.expected_result_count > 1)
  396. ASSERT_EQ(i.output2, results[1]);
  397. }
  398. }
  399. } // namespace base