test_EventEmitter.js (946B)
1 "use strict"; 2 3 let { EventEmitter } = ChromeUtils.importESModule( 4 "resource:///modules/syncedtabs/EventEmitter.sys.mjs" 5 ); 6 7 add_task(async function testSingleListener() { 8 let eventEmitter = new EventEmitter(); 9 let spy = sinon.spy(); 10 11 eventEmitter.on("click", spy); 12 eventEmitter.emit("click", "foo", "bar"); 13 Assert.ok(spy.calledOnce); 14 Assert.ok(spy.calledWith("foo", "bar")); 15 16 eventEmitter.off("click", spy); 17 eventEmitter.emit("click"); 18 Assert.ok(spy.calledOnce); 19 }); 20 21 add_task(async function testMultipleListeners() { 22 let eventEmitter = new EventEmitter(); 23 let spy1 = sinon.spy(); 24 let spy2 = sinon.spy(); 25 26 eventEmitter.on("some_event", spy1); 27 eventEmitter.on("some_event", spy2); 28 eventEmitter.emit("some_event"); 29 Assert.ok(spy1.calledOnce); 30 Assert.ok(spy2.calledOnce); 31 32 eventEmitter.off("some_event", spy1); 33 eventEmitter.emit("some_event"); 34 Assert.ok(spy1.calledOnce); 35 Assert.ok(spy2.calledTwice); 36 });