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import { test, describe, expect, it } from "bun:test";
import fs from "node:fs";
// this is also testing that imports with default and named imports in the same statement work
// our transpiler transform changes this to a var with import.meta.require
import EventEmitter, {
getEventListeners,
captureRejectionSymbol,
} from "node:events";
describe("EventEmitter", () => {
it("captureRejectionSymbol", () => {
expect(EventEmitter.captureRejectionSymbol).toBeDefined();
expect(captureRejectionSymbol).toBeDefined();
});
test("getEventListeners", () => {
expect(getEventListeners(new EventEmitter(), "hey").length).toBe(0);
});
test("EventEmitter constructor", () => {
var emitter = new EventEmitter();
emitter.setMaxListeners(100);
expect(emitter.getMaxListeners()).toBe(100);
});
// These are also tests for the done() function in the test runner.
test("EventEmitter emit (different tick)", (done) => {
var emitter = new EventEmitter();
emitter.on("wow", () => done());
queueMicrotask(() => {
emitter.emit("wow");
});
});
// Unlike Jest, bun supports async and done
test("async EventEmitter emit (microtask)", async (done) => {
await 1;
var emitter = new EventEmitter();
emitter.on("wow", () => done());
emitter.emit("wow");
});
test("async EventEmitter emit (microtask) after", async (done) => {
var emitter = new EventEmitter();
emitter.on("wow", () => done());
await 1;
emitter.emit("wow");
});
test("EventEmitter emit (same tick)", (done) => {
var emitter = new EventEmitter();
emitter.on("wow", () => done());
emitter.emit("wow");
});
test("EventEmitter emit (setTimeout task)", (done) => {
var emitter = new EventEmitter();
emitter.on("wow", () => done());
setTimeout(() => emitter.emit("wow"), 1);
});
});
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