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LibJS: Add tests for destructuring assignments and function parameters

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Ali Mohammad Pur 2021-05-29 18:17:03 +04:30 • committed by Ali Mohammad Pur
parent 7a00d6d9c8
commit 827d94939b
2 changed files with 362 additions and 0 deletions
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207
Userland/Libraries/LibJS/Tests/syntax/destructuring-assignment.js Normal file
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describe("parsing", () => {
test("single name", () => {
expect(`var { a } = {};`).toEval();
expect(`const { a } = {};`).toEval();
expect(`let { a } = {};`).toEval();
});
test("single name with rest values", () => {
expect(`var { a, ...rest } = {};`).toEval();
expect(`const { a, ...rest } = {};`).toEval();
expect(`let { a, ...rest } = {};`).toEval();
});
test("single aliased name", () => {
expect(`var { a: b } = {};`).toEval();
expect(`const { a: b } = {};`).toEval();
expect(`let { a: b } = {};`).toEval();
});
test("single aliased name with rest values", () => {
expect(`var { a: b, ...rest } = {};`).toEval();
expect(`const { a: b, ...rest } = {};`).toEval();
expect(`let { a: b, ...rest } = {};`).toEval();
});
test("array destructuring patterns", () => {
expect(`var [ a ] = [];`).toEval();
expect(`const [ a ] = [];`).toEval();
expect(`let [ a ] = [];`).toEval();
});
test("destructuring assignment with rest assignments, array patterns", () => {
expect(`var [ a, ...rest ] = [];`).toEval();
expect(`const [ a, ...rest ] = [];`).toEval();
expect(`let [ a, ...rest ] = [];`).toEval();
});
test("destructuring assignment with rest names, array patterns with recursive patterns", () => {
expect(`var [ a, [ ...rest ] ] = [];`).toEval();
expect(`const [ a, [ ...rest ] ] = [];`).toEval();
expect(`let [ a, [ ...rest ] ] = [];`).toEval();
});
test("destructuring assignment with rest names, array patterns with recursive patterns 2", () => {
expect(`var [ a, [ ...{length} ] ] = [];`).toEval();
expect(`const [ a, [ ...{length} ] ] = [];`).toEval();
expect(`let [ a, [ ...{length} ] ] = [];`).toEval();
});
});
describe("evaluating", () => {
test("single name", () => {
let o = { a: 1 };
{
var { a } = o;
expect(a).toBe(o.a);
}
{
const { a } = o;
expect(a).toBe(o.a);
}
{
let { a } = o;
expect(a).toBe(o.a);
}
});
test("single name with rest values", () => {
let o = { a: 1, b: 2 };
{
var { a, ...b } = o;
expect(a).toBe(o.a);
expect(b).toEqual({ b: 2 });
}
{
const { a, ...b } = o;
expect(a).toBe(o.a);
expect(b).toEqual({ b: 2 });
}
{
let { a, ...b } = o;
expect(a).toBe(o.a);
expect(b).toEqual({ b: 2 });
}
});
test("single aliased name", () => {
let o = { a: 1 };
{
var { a: x } = o;
expect(x).toBe(o.a);
}
{
const { a: x } = o;
expect(x).toBe(o.a);
}
{
let { a: x } = o;
expect(x).toBe(o.a);
}
});
test("single aliased name with rest values", () => {
let o = { a: 1, b: 2 };
{
var { a: x, ...b } = o;
expect(x).toBe(o.a);
expect(b).toEqual({ b: 2 });
}
{
const { a: x, ...b } = o;
expect(x).toBe(o.a);
expect(b).toEqual({ b: 2 });
}
{
let { a: x, ...b } = o;
expect(x).toBe(o.a);
expect(b).toEqual({ b: 2 });
}
});
test("array patterns", () => {
let o = [1, 2, 3, 4];
{
var [a, b] = o;
expect(a).toBe(o[0]);
expect(b).toBe(o[1]);
}
{
const [a, b] = o;
expect(a).toBe(o[0]);
expect(b).toBe(o[1]);
}
{
let [a, b] = o;
expect(a).toBe(o[0]);
expect(b).toBe(o[1]);
}
});
test("destructuring assignment with rest names, array patterns", () => {
let o = [1, 2, 3, 4];
{
var [a, ...b] = o;
expect(a).toBe(o[0]);
expect(b).toEqual(o.slice(1));
}
{
const [a, ...b] = o;
expect(a).toBe(o[0]);
expect(b).toEqual(o.slice(1));
}
{
let [a, ...b] = o;
expect(a).toBe(o[0]);
expect(b).toEqual(o.slice(1));
}
});
test("destructuring assignment with rest names, array patterns with recursive patterns", () => {
let o = [1, [2, 3, 4]];
{
var [a, [b, ...c]] = o;
expect(a).toBe(o[0]);
expect(b).toBe(o[1][0]);
expect(c).toEqual(o[1].slice(1));
}
{
const [a, [b, ...c]] = o;
expect(a).toBe(o[0]);
expect(b).toBe(o[1][0]);
expect(c).toEqual(o[1].slice(1));
}
{
let [a, [b, ...c]] = o;
expect(a).toBe(o[0]);
expect(b).toBe(o[1][0]);
expect(c).toEqual(o[1].slice(1));
}
});
test("destructuring assignment with rest names, array patterns with recursive patterns 2", () => {
let o = [1, [2, 3, 4]];
{
var [a, [...{ length }]] = o;
expect(a).toBe(o[0]);
expect(length).toBe(o[1].length);
}
{
const [a, [...{ length }]] = o;
expect(a).toBe(o[0]);
expect(length).toBe(o[1].length);
}
{
let [a, [...{ length }]] = o;
expect(a).toBe(o[0]);
expect(length).toBe(o[1].length);
}
});
test("patterns with default", () => {
let o = { a: 1 };
let { x = "foo", a = "bar" } = o;
expect(x).toBe("foo");
expect(a).toBe(o.a);
});
});