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Bun includes a fast, Jest-compatible test runner.

​
Run All Tests

bun test

​
Run Specific File

bun test math.test.ts

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Watch Mode

bun test --watch

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Example Test

math.test.ts
import { test, expect } from "bun:test";

test("addition", () => {
  expect(2 + 2).toBe(4);
});

test("async test", async () => {
  const result = await fetchData();
  expect(result).toBeDefined();
});
See Test Runner for complete documentation.

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