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"use strict";
let { EventEmitter } = ChromeUtils.importESModule(
"resource:///modules/syncedtabs/EventEmitter.sys.mjs"
);
add_task(async function testSingleListener() {
let eventEmitter = new EventEmitter();
let spy = sinon.spy();
eventEmitter.on("click", spy);
eventEmitter.emit("click", "foo", "bar");
Assert.ok(spy.calledOnce);
Assert.ok(spy.calledWith("foo", "bar"));
eventEmitter.off("click", spy);
eventEmitter.emit("click");
Assert.ok(spy.calledOnce);
});
add_task(async function testMultipleListeners() {
let eventEmitter = new EventEmitter();
let spy1 = sinon.spy();
let spy2 = sinon.spy();
eventEmitter.on("some_event", spy1);
eventEmitter.on("some_event", spy2);
eventEmitter.emit("some_event");
Assert.ok(spy1.calledOnce);
Assert.ok(spy2.calledOnce);
eventEmitter.off("some_event", spy1);
eventEmitter.emit("some_event");
Assert.ok(spy1.calledOnce);
Assert.ok(spy2.calledTwice);
});
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