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import {
test,
expect,
describe,
beforeAll,
afterAll,
beforeEach,
afterEach,
spyOn,
} from "bun:test";
import { expectType } from "tsd";
const spy = spyOn(console, "log");
expectType<any[][]>(spy.mock.calls);
const hooks = [beforeAll, beforeEach, afterAll, afterEach];
for (const hook of hooks) {
hook(() => {
// ...
});
hook(async () => {
// ...
});
hook((done: (err?: unknown) => void) => {
done();
done(new Error());
done("Error");
});
}
describe("bun:test", () => {
describe("expect()", () => {
test("toThrow()", () => {
function fail() {
throw new Error("Bad");
}
expect(fail).toThrow();
expect(fail).toThrow("Bad");
expect(fail).toThrow(/bad/i);
expect(fail).toThrow(Error);
expect(fail).toThrow(new Error("Bad"));
});
});
test("expect()", () => {
expect(1).toBe(1);
expect(1).not.toBe(2);
// @ts-expect-error
expect({ a: 1 }).toEqual({ a: 1, b: undefined });
expect({ a: 1 }).toStrictEqual({ a: 1 });
expect(new Set()).toHaveProperty("size");
expect(new Uint8Array()).toHaveProperty("byteLength", 0);
expect([]).toHaveLength(0);
expect(["bun"]).toContain("bun");
expect(true).toBeTruthy();
expect(false).toBeFalsy();
expect(Math.PI).toBeGreaterThan(3.14);
expect(Math.PI).toBeGreaterThan(3n);
expect(Math.PI).toBeGreaterThanOrEqual(3.14);
expect(Math.PI).toBeGreaterThanOrEqual(3n);
expect(NaN).toBeNaN();
expect(null).toBeNull();
expect(undefined).toBeUndefined();
expect(undefined).not.toBeDefined();
});
});
// inference should work when data is passed directly in
test.each([
["a", true, 5],
["b", false, 1234],
])("test.each", (a, b, c) => {
expectType<string>(a);
expectType<boolean>(b);
expectType<number | string>(c);
});
describe.each([
["a", true, 5],
["b", false, 5],
])("test.each", (a, b, c) => {
expectType<string>(a);
expectType<boolean>(b);
expectType<number | string>(c);
});
describe.each([
["a", true, 5],
["b", false, "asdf"],
])("test.each", (a, b, c) => {
expectType<string>(a);
expectType<boolean>(b);
expectType<number | string>(c);
});
describe.each([{ asdf: "asdf" }, { asdf: "asdf" }])("test.each", (a, b, c) => {
expectType<{ asdf: string }>(a);
expectType<{ asdf: string }>(c);
});
// no inference on data
const data = [
["a", true, 5],
["b", false, "asdf"],
];
test.each(data)("test.each", (...args) => {
expectType<string | number | boolean>(args[0]);
});
describe.each(data)("test.each", (a, b, c) => {
expectType<string | number | boolean>(a);
expectType<string | number | boolean>(b);
expectType<string | number | boolean>(c);
});
// as const
const dataAsConst = [
["a", true, 5],
["b", false, "asdf"],
] as const;
test.each(dataAsConst)("test.each", (...args) => {
expectType<string>(args[0]);
expectType<boolean>(args[1]);
expectType<string | number>(args[2]);
});
describe.each(dataAsConst)("test.each", (...args) => {
expectType<string>(args[0]);
expectType<boolean>(args[1]);
expectType<string | number>(args[2]);
});
describe.each(dataAsConst)("test.each", (a, b, c) => {
expectType<"a" | "b">(a);
expectType<boolean>(b);
expectType<5 | "asdf">(c);
});
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