jest-async

Simplify Jest parallel testing.
This allows you to write fast test code.

The return value of each test can be received by Promise.
You can synchronize by waiting for them with "await".

Example

- Async Test

``ts
import { testAsync, beforeAllAsync, afterAllAsync } from "jest-async";

const sleep = (value: number) =>
new Promise((resolve) => setTimeout(resolve, value));

describe("Test", () => {
const initWait = beforeAllAsync(async () => {
await sleep(1000);
console.log("beforeAll");
});
const A = testAsync("A", async () => {
await sleep(1000);
await initWait;
console.log("A");
return 100;
});
const B = testAsync("B", async () => {
await sleep(4000);
await initWait;
console.log("B");
return 200;
});
testAsync("C", async () => {
await sleep(3000);
const value = (await A) + (await B);
console.log("C", value);
expect(value).toBe(300);
});
testAsync("D", async () => {
await sleep(2000);
console.log("D");
});
afterAllAsync(async () => {
console.log("afterAll");
});
});
/*
1,000 + 1,000 + 4,000 + 3,000 + 2,000 = 11,000ms
↓ Parallel execution
4,541ms

console.log
beforeAll

at log (test/test01.test.ts:9:13)

console.log
A

at log (test/test01.test.ts:14:13)

console.log
D

at log (test/test01.test.ts:31:13)

console.log
B

at log (test/test01.test.ts:20:13)

console.log
C 300

at log (test/test01.test.ts:26:13)

console.log
afterAll

at log (test/test01.test.ts:34:13)

PASS test/test01.test.ts
Test
√ A (1 ms)
√ B (2990 ms)
√ C
√ D

Test Suites: 1 passed, 1 total
Tests: 4 passed, 4 total
Snapshots: 0 total
Time: 4.541 s, estimated 5 s
*/
`

- Sync Test

`ts
import { beforeAllAsync, testSync, afterAllAsync } from "jest-async";

const sleep = (value: number) =>
new Promise((resolve) => setTimeout(resolve, value));

describe("Test2", () => {
const initWait = beforeAllAsync(async () => {
await sleep(1000);
console.log("beforeAll2");
});
const A = testSync("A2", async () => {
await sleep(1000);
await initWait;
console.log("A2");
return 100;
});
const B = testSync("B2", async () => {
await sleep(4000);
await initWait;
console.log("B2");
return 200;
});
testSync("C2", async () => {
await sleep(3000);
const value = (await A) + (await B);
console.log("C2", value);
expect(value).toBe(300);
});
testSync("D2", async () => {
await sleep(2000);
console.log("D2");
});
afterAllAsync(async () => {
console.log("afterAll2");
});
});

/*
console.log
beforeAll2

at log (test/test02.test.ts:9:13)

console.log
A2

at log (test/test02.test.ts:14:13)

console.log
B2

at log (test/test02.test.ts:20:13)

console.log
C2 300

at log (test/test02.test.ts:26:13)

console.log
D2

at log (test/test02.test.ts:31:13)

console.log
afterAll2

at log (test/test02.test.ts:34:13)

PASS test/test02.test.ts (11.329 s)
Test2
√ A2 (1018 ms)
√ B2 (4003 ms)
√ C2 (3011 ms)
√ D2 (2008 ms)

Test Suites: 1 passed, 1 total
Tests: 4 passed, 4 total
Snapshots: 0 total
Time: 11.596 s, estimated 12 s
``