@daiso-tech/core
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The library offers flexible, framework-agnostic solutions for modern web applications, built on adaptable components that integrate seamlessly with popular frameworks like Next Js.
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JavaScript
/**
* @module EventBus
*/
import { describe, vi, } from "vitest";
import {} from "../../../utilities/_module-exports.js";
import { TimeSpan } from "../../../utilities/_module-exports.js";
import { LazyPromise } from "../../../async/_module-exports.js";
/**
* The `eventBusAdapterTestSuite` function simplifies the process of testing your custom implementation of {@link IEventBusAdapter | `IEventBusAdapter`} with vitest.
*
* IMPORT_PATH: `"@daiso-tech/core/event-bus/test-utilities"`
* @group TestUtilities
*/
export function eventBusAdapterTestSuite(settings) {
const { expect, test, createAdapter, beforeEach } = settings;
let adapter;
beforeEach(async () => {
adapter = await createAdapter();
});
async function delay(time) {
await LazyPromise.delay(time);
}
const TTL = TimeSpan.fromMilliseconds(50);
describe("method: addListener, removeListener, dispatch", () => {
test("Should be null when listener added and event is not triggered", async () => {
const handlerFn = vi.fn((_event) => { });
await adapter.addListener("event", handlerFn);
expect(handlerFn).not.toHaveBeenCalled();
});
test("Should be TestEvent when listener added and event is triggered", async () => {
const handlerFn = vi.fn((_event) => { });
await adapter.addListener("event", handlerFn);
const event = {
type: "event",
};
await adapter.dispatch("event", event);
await delay(TTL);
expect(handlerFn).toHaveBeenCalledTimes(1);
expect(handlerFn).toHaveBeenCalledWith(event);
});
test("Should be null when listener removed and event is triggered", async () => {
const handlerFn = vi.fn((_event) => { });
await adapter.addListener("event", handlerFn);
await adapter.removeListener("event", handlerFn);
const event = {
type: "event",
};
await adapter.dispatch("event", event);
await delay(TTL);
expect(handlerFn).not.toHaveBeenCalled();
});
});
}
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