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comparison: dom/indexedDB/test/unit/test_writer_starvation.js
dom/indexedDB/test/unit/test_writer_starvation.js
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- 6474c204b198
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| -1:000000000000 | 0:d26c05004b85 |
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| 1 /** | |
| 2 * Any copyright is dedicated to the Public Domain. | |
| 3 * http://creativecommons.org/publicdomain/zero/1.0/ | |
| 4 */ | |
| 5 | |
| 6 if (!this.window) { | |
| 7 this.runTest = function() { | |
| 8 todo(false, "Test disabled in xpcshell test suite for now"); | |
| 9 finishTest(); | |
| 10 } | |
| 11 } | |
| 12 | |
| 13 var testGenerator = testSteps(); | |
| 14 | |
| 15 function testSteps() | |
| 16 { | |
| 17 const name = this.window ? window.location.pathname : "Splendid Test"; | |
| 18 | |
| 19 // Needs to be enough to saturate the thread pool. | |
| 20 const SYNC_REQUEST_COUNT = 25; | |
| 21 | |
| 22 let request = indexedDB.open(name, 1); | |
| 23 request.onerror = errorHandler; | |
| 24 request.onupgradeneeded = grabEventAndContinueHandler; | |
| 25 request.onsuccess = grabEventAndContinueHandler; | |
| 26 let event = yield undefined; | |
| 27 | |
| 28 let db = event.target.result; | |
| 29 db.onerror = errorHandler; | |
| 30 | |
| 31 is(event.target.transaction.mode, "versionchange", "Correct mode"); | |
| 32 | |
| 33 let objectStore = db.createObjectStore("foo", { autoIncrement: true }); | |
| 34 | |
| 35 request = objectStore.add({}); | |
| 36 request.onerror = errorHandler; | |
| 37 request.onsuccess = grabEventAndContinueHandler; | |
| 38 event = yield undefined; | |
| 39 | |
| 40 let key = event.target.result; | |
| 41 ok(key, "Got a key"); | |
| 42 | |
| 43 yield undefined; | |
| 44 | |
| 45 let continueReading = true; | |
| 46 let readerCount = 0; | |
| 47 let writerCount = 0; | |
| 48 let callbackCount = 0; | |
| 49 | |
| 50 // Generate a bunch of reads right away without returning to the event | |
| 51 // loop. | |
| 52 info("Generating " + SYNC_REQUEST_COUNT + " readonly requests"); | |
| 53 | |
| 54 for (let i = 0; i < SYNC_REQUEST_COUNT; i++) { | |
| 55 readerCount++; | |
| 56 let request = db.transaction("foo").objectStore("foo").get(key); | |
| 57 request.onsuccess = function(event) { | |
| 58 is(event.target.transaction.mode, "readonly", "Correct mode"); | |
| 59 callbackCount++; | |
| 60 }; | |
| 61 } | |
| 62 | |
| 63 while (continueReading) { | |
| 64 readerCount++; | |
| 65 info("Generating additional readonly request (" + readerCount + ")"); | |
| 66 let request = db.transaction("foo").objectStore("foo").get(key); | |
| 67 request.onsuccess = function(event) { | |
| 68 callbackCount++; | |
| 69 info("Received readonly request callback (" + callbackCount + ")"); | |
| 70 is(event.target.transaction.mode, "readonly", "Correct mode"); | |
| 71 if (callbackCount == SYNC_REQUEST_COUNT) { | |
| 72 writerCount++; | |
| 73 info("Generating 1 readwrite request with " + readerCount + | |
| 74 " previous readonly requests"); | |
| 75 let request = db.transaction("foo", "readwrite") | |
| 76 .objectStore("foo") | |
| 77 .add({}, readerCount); | |
| 78 request.onsuccess = function(event) { | |
| 79 callbackCount++; | |
| 80 info("Received readwrite request callback (" + callbackCount + ")"); | |
| 81 is(event.target.transaction.mode, "readwrite", "Correct mode"); | |
| 82 is(event.target.result, callbackCount, | |
| 83 "write callback came before later reads"); | |
| 84 } | |
| 85 } | |
| 86 else if (callbackCount == SYNC_REQUEST_COUNT + 5) { | |
| 87 continueReading = false; | |
| 88 } | |
| 89 }; | |
| 90 | |
| 91 setTimeout(function() { testGenerator.next(); }, writerCount ? 1000 : 100); | |
| 92 yield undefined; | |
| 93 } | |
| 94 | |
| 95 while (callbackCount < (readerCount + writerCount)) { | |
| 96 executeSoon(function() { testGenerator.next(); }); | |
| 97 yield undefined; | |
| 98 } | |
| 99 | |
| 100 is(callbackCount, readerCount + writerCount, "All requests accounted for"); | |
| 101 | |
| 102 finishTest(); | |
| 103 yield undefined; | |
| 104 } |
