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scheduler.spec.ts
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scheduler.spec.ts
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/** @vitest-environment jsdom */
import { cancelCallback, requestCallback } from "../src";
import "./MessageChannel";
describe("requestCallback basics", () => {
test("queue a task", () =>
new Promise(done => {
requestCallback(() => {
done(undefined);
});
}));
test("queue a task in correct order", () =>
new Promise(done => {
let count = 0;
requestCallback(() => {
expect(count).toBe(2);
done(undefined);
});
requestCallback(
() => {
count++;
expect(count).toBe(1);
},
{ timeout: 10 }
);
requestCallback(
() => {
count++;
expect(count).toBe(2);
},
{ timeout: 40 }
);
}));
test("supports cancelling a callback", () =>
new Promise((done, reject) => {
const task = requestCallback(() => {
reject(new Error("should not be called"));
});
cancelCallback(task);
requestCallback(() => done(undefined));
}));
});