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code-server/packages/events/test/events.test.ts

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import { Emitter } from "../src/events";
describe("Event", () => {
const emitter = new Emitter<number>();
it("should listen to global event", () => {
const fn = jest.fn();
const d = emitter.event(fn);
emitter.emit(10);
expect(fn).toHaveBeenCalledWith(10);
d.dispose();
});
it("should listen to id event", () => {
const fn = jest.fn();
const d = emitter.event(0, fn);
emitter.emit(0, 5);
expect(fn).toHaveBeenCalledWith(5);
d.dispose();
});
it("should listen to string id event", () => {
const fn = jest.fn();
const d = emitter.event("string", fn);
emitter.emit("string", 55);
expect(fn).toHaveBeenCalledWith(55);
d.dispose();
});
it("should not listen wrong id event", () => {
const fn = jest.fn();
const d = emitter.event(1, fn);
emitter.emit(0, 5);
emitter.emit(1, 6);
expect(fn).toHaveBeenCalledWith(6);
expect(fn).toHaveBeenCalledTimes(1);
d.dispose();
});
it("should listen to id event globally", () => {
const fn = jest.fn();
const d = emitter.event(fn);
emitter.emit(1, 11);
expect(fn).toHaveBeenCalledWith(11);
d.dispose();
});
it("should listen to global event", () => {
const fn = jest.fn();
const d = emitter.event(3, fn);
emitter.emit(14);
expect(fn).toHaveBeenCalledWith(14);
d.dispose();
});
it("should listen to id event multiple times", () => {
const fn = jest.fn();
const disposers = [
emitter.event(934, fn),
emitter.event(934, fn),
emitter.event(934, fn),
emitter.event(934, fn),
];
emitter.emit(934, 324);
expect(fn).toHaveBeenCalledTimes(4);
expect(fn).toHaveBeenCalledWith(324);
disposers.forEach((d) => d.dispose());
});
it("should dispose individually", () => {
const fn = jest.fn();
const d = emitter.event(fn);
const fn2 = jest.fn();
const d2 = emitter.event(1, fn2);
d.dispose();
emitter.emit(12);
emitter.emit(1, 12);
expect(fn).not.toBeCalled();
expect(fn2).toBeCalledTimes(2);
d2.dispose();
emitter.emit(12);
emitter.emit(1, 12);
expect(fn).not.toBeCalled();
expect(fn2).toBeCalledTimes(2);
});
it("should dispose by id", () => {
const fn = jest.fn();
emitter.event(fn);
const fn2 = jest.fn();
emitter.event(1, fn2);
emitter.dispose(1);
emitter.emit(12);
emitter.emit(1, 12);
expect(fn).toBeCalledTimes(2);
expect(fn2).not.toBeCalled();
});
it("should dispose all", () => {
const fn = jest.fn();
emitter.event(fn);
emitter.event(1, fn);
emitter.dispose();
emitter.emit(12);
emitter.emit(1, 12);
expect(fn).not.toBeCalled();
});
});