DistinctTest.cs 13 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456
  1. // Licensed to the .NET Foundation under one or more agreements.
  2. // The .NET Foundation licenses this file to you under the Apache 2.0 License.
  3. // See the LICENSE file in the project root for more information.
  4. using System;
  5. using System.Collections.Generic;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Threading.Tasks;
  9. using System.Reactive;
  10. using System.Reactive.Concurrency;
  11. using System.Reactive.Linq;
  12. using Microsoft.Reactive.Testing;
  13. using Xunit;
  14. using ReactiveTests.Dummies;
  15. using System.Reflection;
  16. using System.Threading;
  17. using System.Reactive.Disposables;
  18. using System.Reactive.Subjects;
  19. namespace ReactiveTests.Tests
  20. {
  21. public class DistinctTest : ReactiveTest
  22. {
  23. [Fact]
  24. public void Distinct_ArgumentChecking()
  25. {
  26. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>)));
  27. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>), EqualityComparer<int>.Default));
  28. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, default(EqualityComparer<int>)));
  29. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>), x => x));
  30. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, default(Func<int, int>)));
  31. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(default(IObservable<int>), x => x, EqualityComparer<int>.Default));
  32. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, default(Func<int, int>), EqualityComparer<int>.Default));
  33. ReactiveAssert.Throws<ArgumentNullException>(() => Observable.Distinct(DummyObservable<int>.Instance, x => x, default(EqualityComparer<int>)));
  34. }
  35. [Fact]
  36. public void Distinct_DefaultComparer_AllDistinct()
  37. {
  38. var scheduler = new TestScheduler();
  39. var xs = scheduler.CreateHotObservable(
  40. OnNext(280, 4),
  41. OnNext(300, 2),
  42. OnNext(350, 1),
  43. OnNext(380, 3),
  44. OnNext(400, 5),
  45. OnCompleted<int>(420)
  46. );
  47. var res = scheduler.Start(() =>
  48. xs.Distinct()
  49. );
  50. res.Messages.AssertEqual(
  51. OnNext(280, 4),
  52. OnNext(300, 2),
  53. OnNext(350, 1),
  54. OnNext(380, 3),
  55. OnNext(400, 5),
  56. OnCompleted<int>(420)
  57. );
  58. xs.Subscriptions.AssertEqual(
  59. Subscribe(200, 420)
  60. );
  61. }
  62. [Fact]
  63. public void Distinct_DefaultComparer_SomeDuplicates()
  64. {
  65. var scheduler = new TestScheduler();
  66. var xs = scheduler.CreateHotObservable(
  67. OnNext(280, 4),
  68. OnNext(300, 2),
  69. OnNext(350, 2),
  70. OnNext(380, 3),
  71. OnNext(400, 4),
  72. OnCompleted<int>(420)
  73. );
  74. var res = scheduler.Start(() =>
  75. xs.Distinct()
  76. );
  77. res.Messages.AssertEqual(
  78. OnNext(280, 4),
  79. OnNext(300, 2),
  80. OnNext(380, 3),
  81. OnCompleted<int>(420)
  82. );
  83. xs.Subscriptions.AssertEqual(
  84. Subscribe(200, 420)
  85. );
  86. }
  87. [Fact]
  88. public void Distinct_CustomComparer_AllDistinct()
  89. {
  90. var scheduler = new TestScheduler();
  91. var xs = scheduler.CreateHotObservable(
  92. OnNext(280, 4),
  93. OnNext(300, 2),
  94. OnNext(350, 1),
  95. OnNext(380, 3),
  96. OnNext(400, 5),
  97. OnCompleted<int>(420)
  98. );
  99. var res = scheduler.Start(() =>
  100. xs.Distinct(new ModComparer(10))
  101. );
  102. res.Messages.AssertEqual(
  103. OnNext(280, 4),
  104. OnNext(300, 2),
  105. OnNext(350, 1),
  106. OnNext(380, 3),
  107. OnNext(400, 5),
  108. OnCompleted<int>(420)
  109. );
  110. xs.Subscriptions.AssertEqual(
  111. Subscribe(200, 420)
  112. );
  113. }
  114. [Fact]
  115. public void Distinct_CustomComparer_SomeDuplicates()
  116. {
  117. var scheduler = new TestScheduler();
  118. var xs = scheduler.CreateHotObservable(
  119. OnNext(280, 4),
  120. OnNext(300, 2),
  121. OnNext(350, 12),
  122. OnNext(380, 3),
  123. OnNext(400, 24),
  124. OnCompleted<int>(420)
  125. );
  126. var res = scheduler.Start(() =>
  127. xs.Distinct(new ModComparer(10))
  128. );
  129. res.Messages.AssertEqual(
  130. OnNext(280, 4),
  131. OnNext(300, 2),
  132. OnNext(380, 3),
  133. OnCompleted<int>(420)
  134. );
  135. xs.Subscriptions.AssertEqual(
  136. Subscribe(200, 420)
  137. );
  138. }
  139. class ModComparer : IEqualityComparer<int>
  140. {
  141. private readonly int _mod;
  142. public ModComparer(int mod)
  143. {
  144. _mod = mod;
  145. }
  146. public bool Equals(int x, int y)
  147. {
  148. return EqualityComparer<int>.Default.Equals(x % _mod, y % _mod);
  149. }
  150. public int GetHashCode(int obj)
  151. {
  152. return EqualityComparer<int>.Default.GetHashCode(obj % _mod);
  153. }
  154. }
  155. [Fact]
  156. public void Distinct_KeySelector_DefaultComparer_AllDistinct()
  157. {
  158. var scheduler = new TestScheduler();
  159. var xs = scheduler.CreateHotObservable(
  160. OnNext(280, 8),
  161. OnNext(300, 4),
  162. OnNext(350, 2),
  163. OnNext(380, 6),
  164. OnNext(400, 10),
  165. OnCompleted<int>(420)
  166. );
  167. var res = scheduler.Start(() =>
  168. xs.Distinct(x => x / 2)
  169. );
  170. res.Messages.AssertEqual(
  171. OnNext(280, 8),
  172. OnNext(300, 4),
  173. OnNext(350, 2),
  174. OnNext(380, 6),
  175. OnNext(400, 10),
  176. OnCompleted<int>(420)
  177. );
  178. xs.Subscriptions.AssertEqual(
  179. Subscribe(200, 420)
  180. );
  181. }
  182. [Fact]
  183. public void Distinct_KeySelector_DefaultComparer_SomeDuplicates()
  184. {
  185. var scheduler = new TestScheduler();
  186. var xs = scheduler.CreateHotObservable(
  187. OnNext(280, 4),
  188. OnNext(300, 2),
  189. OnNext(350, 3),
  190. OnNext(380, 7),
  191. OnNext(400, 5),
  192. OnCompleted<int>(420)
  193. );
  194. var res = scheduler.Start(() =>
  195. xs.Distinct(x => x / 2)
  196. );
  197. res.Messages.AssertEqual(
  198. OnNext(280, 4),
  199. OnNext(300, 2),
  200. OnNext(380, 7),
  201. OnCompleted<int>(420)
  202. );
  203. xs.Subscriptions.AssertEqual(
  204. Subscribe(200, 420)
  205. );
  206. }
  207. [Fact]
  208. public void Distinct_KeySelector_CustomComparer_AllDistinct()
  209. {
  210. var scheduler = new TestScheduler();
  211. var xs = scheduler.CreateHotObservable(
  212. OnNext(280, 8),
  213. OnNext(300, 4),
  214. OnNext(350, 2),
  215. OnNext(380, 6),
  216. OnNext(400, 10),
  217. OnCompleted<int>(420)
  218. );
  219. var res = scheduler.Start(() =>
  220. xs.Distinct(x => x / 2, new ModComparer(10))
  221. );
  222. res.Messages.AssertEqual(
  223. OnNext(280, 8),
  224. OnNext(300, 4),
  225. OnNext(350, 2),
  226. OnNext(380, 6),
  227. OnNext(400, 10),
  228. OnCompleted<int>(420)
  229. );
  230. xs.Subscriptions.AssertEqual(
  231. Subscribe(200, 420)
  232. );
  233. }
  234. [Fact]
  235. public void Distinct_KeySelector_CustomComparer_SomeDuplicates()
  236. {
  237. var scheduler = new TestScheduler();
  238. var xs = scheduler.CreateHotObservable(
  239. OnNext(280, 8),
  240. OnNext(300, 4),
  241. OnNext(350, 2),
  242. OnNext(380, 6),
  243. OnNext(400, 10),
  244. OnCompleted<int>(420)
  245. );
  246. var res = scheduler.Start(() =>
  247. xs.Distinct(x => x / 2, new ModComparer(3))
  248. );
  249. res.Messages.AssertEqual(
  250. OnNext(280, 8),
  251. OnNext(300, 4),
  252. OnNext(380, 6),
  253. OnCompleted<int>(420)
  254. );
  255. xs.Subscriptions.AssertEqual(
  256. Subscribe(200, 420)
  257. );
  258. }
  259. [Fact]
  260. public void Distinct_KeySelector_Throws()
  261. {
  262. var scheduler = new TestScheduler();
  263. var xs = scheduler.CreateHotObservable(
  264. OnNext(280, 3),
  265. OnNext(300, 2),
  266. OnNext(350, 1),
  267. OnNext(380, 0),
  268. OnNext(400, 4),
  269. OnCompleted<int>(420)
  270. );
  271. var ex = new Exception();
  272. var res = scheduler.Start(() =>
  273. xs.Distinct(x => { if (x == 0) throw ex; return x / 2; })
  274. );
  275. res.Messages.AssertEqual(
  276. OnNext(280, 3),
  277. OnNext(350, 1),
  278. OnError<int>(380, ex)
  279. );
  280. xs.Subscriptions.AssertEqual(
  281. Subscribe(200, 380)
  282. );
  283. }
  284. [Fact]
  285. public void Distinct_CustomComparer_Throws()
  286. {
  287. var scheduler = new TestScheduler();
  288. var xs = scheduler.CreateHotObservable(
  289. OnNext(280, 1),
  290. OnNext(300, 2),
  291. OnNext(350, 3),
  292. OnNext(380, 4),
  293. OnNext(400, 5),
  294. OnCompleted<int>(420)
  295. );
  296. var ex = new Exception();
  297. var res = scheduler.Start(() =>
  298. xs.Distinct(new ThrowComparer(4, ex))
  299. );
  300. res.Messages.AssertEqual(
  301. OnNext(280, 1),
  302. OnNext(300, 2),
  303. OnNext(350, 3),
  304. OnError<int>(380, ex)
  305. );
  306. xs.Subscriptions.AssertEqual(
  307. Subscribe(200, 380)
  308. );
  309. }
  310. class ThrowComparer : IEqualityComparer<int>
  311. {
  312. private readonly int _err;
  313. private readonly Exception _ex;
  314. public ThrowComparer(int err, Exception ex)
  315. {
  316. _err = err;
  317. _ex = ex;
  318. }
  319. public bool Equals(int x, int y)
  320. {
  321. return EqualityComparer<int>.Default.Equals(x, y);
  322. }
  323. public int GetHashCode(int obj)
  324. {
  325. if (obj == _err)
  326. throw _ex;
  327. return EqualityComparer<int>.Default.GetHashCode(obj);
  328. }
  329. }
  330. [Fact]
  331. public void Distinct_Throw()
  332. {
  333. var scheduler = new TestScheduler();
  334. var ex = new Exception();
  335. var xs = scheduler.CreateHotObservable(
  336. OnNext(280, 1),
  337. OnNext(300, 2),
  338. OnNext(350, 3),
  339. OnError<int>(380, ex)
  340. );
  341. var res = scheduler.Start(() =>
  342. xs.Distinct()
  343. );
  344. res.Messages.AssertEqual(
  345. OnNext(280, 1),
  346. OnNext(300, 2),
  347. OnNext(350, 3),
  348. OnError<int>(380, ex)
  349. );
  350. xs.Subscriptions.AssertEqual(
  351. Subscribe(200, 380)
  352. );
  353. }
  354. [Fact]
  355. public void Distinct_Null()
  356. {
  357. var scheduler = new TestScheduler();
  358. var xs = scheduler.CreateHotObservable(
  359. OnNext(220, "bar"),
  360. OnNext(240, default(string)),
  361. OnNext(260, "bar"),
  362. OnNext(280, "foo"),
  363. OnNext(300, default(string)),
  364. OnCompleted<string>(400)
  365. );
  366. var res = scheduler.Start(() =>
  367. xs.Distinct()
  368. );
  369. res.Messages.AssertEqual(
  370. OnNext(220, "bar"),
  371. OnNext(240, default(string)),
  372. OnNext(280, "foo"),
  373. OnCompleted<string>(400)
  374. );
  375. xs.Subscriptions.AssertEqual(
  376. Subscribe(200, 400)
  377. );
  378. }
  379. }
  380. }