[IndexedDB] Add Observer Tests

third_party/WebKit/LayoutTests/storage/indexeddb/resources/observer-removal.js

+if (this.importScripts) {
+    importScripts('../../../resources/testharness.js');
+    importScripts('../../../resources/generic-idb-operations.js');
+}
+
+async_test(function(t) {
+  var dbname = location.pathname + ' - ' + 'unobserve before tx completes';
+  var openRequest = indexedDB.open(dbname);
+  var obs = new IDBObserver(t.unreached_func('Observer callback should not be fired'), { operationTypes: ['put'] });
+
+  openRequest.onupgradeneeded = t.step_func(function() {
+    createDatabase(openRequest.result, ['store']);
+  });
+  openRequest.onsuccess = t.step_func(function() {

[cmumford, 2016/07/21 15:00:56]

Add onerror.

+    var db = openRequest.result;
+    var tx1 = db.transaction('store');
+    var tx2 = db.transaction('store', 'readwrite');
+    tx1.objectStore('store').get(1);
+    tx2.objectStore('store').put(1, 1);
+    obs.observe(db, tx1);
+
+    tx1.onerror = t.unreached_func('transaction should not fail');
+    tx2.oncomplete = t.step_func(function() {
+      t.done();
+    });
+    tx2.onerror = t.unreached_func('transaction should not fail')
+    obs.unobserve(db);
+  });
+}, 'Unobserve before associated transaction completes');
+
+async_test(function(t) {
+  var dbname = location.pathname + ' - ' + 'unobserve after tx completes';
+  var openRequest = indexedDB.open(dbname);
+  var obs = new IDBObserver(t.unreached_func('Observer callback should not be fired'), { operationTypes: ['put'] });
+
+  openRequest.onupgradeneeded = t.step_func(function() {
+    createDatabase(openRequest.result, ['store']);
+  });
+  openRequest.onsuccess = t.step_func(function() {
+    var db = openRequest.result;
+    var tx1 = db.transaction('store');
+    var tx2 = db.transaction('store', 'readwrite');
+    tx1.objectStore('store').get(1);
+    tx2.objectStore('store').put(1, 1);
+    obs.observe(db, tx1);
+
+    tx1.oncomplete = t.step_func(function() { 
+      obs.unobserve(db);
+    });
+    tx1.onerror = t.unreached_func('transaction should not fail');
+    tx2.oncomplete = t.step_func(function() {
+      t.done();
+    });
+    tx2.onerror = t.unreached_func('transaction should not fail');
+  });
+}, 'Unobserve after associated transaction completes');
+
+async_test(function(t) {
+  var dbname = location.pathname + ' - ' + 'unobserve multiple observers';
+  var openRequest = indexedDB.open(dbname);
+  var obs = new IDBObserver(t.unreached_func('Observer callback should not be fired'), { operationTypes: ['put'] });
+  openRequest.onupgradeneeded = t.step_func(function() {
+    createDatabase(openRequest.result, ['store']);
+  });
+  openRequest.onsuccess = t.step_func(function() {
+    var db = openRequest.result;
+    var tx1 = db.transaction('store');
+    var tx2 = db.transaction('store', 'readwrite');
+
+    tx2.objectStore('store').put(1, 1);
+    obs.observe(db, tx1);
+    obs.observe(db, tx1);     // Multiple observe calls registered.
+    obs.observe(db, tx2);     // Multiple observe calls registered.
+    obs.unobserve(db);
+
+    tx1.onerror = t.unreached_func('transaction should not fail');
+    tx2.onerror = t.unreached_func('transaction should not fail');
+    tx2.oncomplete = t.step_func(function() {
+      t.done();
+    })
+  });
+}, 'Unobserve multiple observe calls on same database');
+
+async_test(function(t) {
+  var dbname = location.pathname + ' - ' + 'unobserve non existant observers';
+  var openRequest = indexedDB.open(dbname);
+  var obs = new IDBObserver(t.unreached_func('Observer callback should not be fired'), { operationTypes: ['put'] });
+  openRequest.onupgradeneeded = t.step_func(function() {
+    createDatabase(openRequest.result, ['store']);
+  });
+  openRequest.onsuccess = t.step_func(function() {
+    var db = openRequest.result;
+    obs.unobserve(db);
+    t.done();
+  });
+}, 'Unobserve non existant observer');
+
+async_test(function(t) {
+  var dbname = location.pathname + ' - ' + 'connection close';
+  var cnt1 = 0, cnt2 = 0;
+  var openRequest1 = indexedDB.open(dbname);
+  var obs1 = new IDBObserver(t.step_func(function() { cnt1++; }), { operationTypes: ['put'] });
+  var obs2 = new IDBObserver(t.step_func(function() { cnt2++; }), { operationTypes: ['put'] });
+
+  openRequest1.onupgradeneeded = t.step_func(function() {
+    createDatabase(openRequest1.result, ['store']);
+  });
+  openRequest1.onsuccess = t.step_func(function() {
+    var db1 = openRequest1.result;
+    var tx1 = db1.transaction('store', 'readwrite');
+    var tx2 = db1.transaction('store', 'readwrite');
+    tx1.objectStore('store').get(1);
+    tx2.objectStore('store').put(1, 1);
+    obs1.observe(db1, tx1);
+    obs2.observe(db1, tx2);
+
+    tx1.oncomplete = t.step_func(function() {
+      countCallbacks(cnt1, 0);
+      countCallbacks(cnt2, 0);
+    })
+    tx2.oncomplete = t.step_func(function() {
+      countCallbacks(cnt1, 1);
+      countCallbacks(cnt2, 0);
+
+      db1.close();
+      var openRequest2 = indexedDB.open(dbname);
+      openRequest2.onsuccess = t.step_func(function() {
+        var db2 = openRequest2.result;
+        var tx3 = db2.transaction('store', 'readwrite');
+        tx3.objectStore('store').put(1, 1);
+        tx3.oncomplete = t.step_func(function() {
+          countCallbacks(cnt1, 1);
+          countCallbacks(cnt2, 0);
+          t.done();
+        });
+        tx3.onerror = t.unreached_func('transaction should not fail');
+       });
+    });
+    tx1.onerror = t.unreached_func('transaction should not fail');
+    tx2.onerror = t.unreached_func('transaction should not fail');
+  });
+}, 'Remove observers on database close');
+
+done();