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LibJS: Implement tests for Array.prototype.flat

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Breno Silva 2021-02-16 17:32:51 -03:00 • committed by Andreas Kling
parent 3940635ed3
commit cfb0f3309d
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Userland/Libraries/LibJS/Tests/builtins/Array/Array.prototype.flat.js Normal file
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test("length is 0", () => {
expect(Array.prototype.flat).toHaveLength(0);
});
describe("normal behavior", () => {
test("basic functionality", () => {
var array1 = [1, 2, [3, 4]];
var array2 = [1, 2, [3, 4, [5, 6]]];
var array3 = [1, 2, [3, 4, [5, 6]]];
expect(array1.flat()).toEqual([1, 2, 3, 4]);
expect(array2.flat()).toEqual([1, 2, 3, 4, [5, 6]]);
expect(array3.flat(2)).toEqual([1, 2, 3, 4, 5, 6]);
});
test("calls depth as infinity", () => {
var array1 = [1, 2, [3, 4, [5, 6, [7, 8]]]];
expect(array1.flat(Infinity)).toEqual([1, 2, 3, 4, 5, 6, 7, 8]);
expect(array1.flat(-Infinity)).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
});
test("calls depth as undefined", () => {
var array1 = [1, 2, [3, 4, [5, 6, [7, 8]]]];
expect(array1.flat(undefined)).toEqual([1, 2, 3, 4, [5, 6, [7, 8]]]);
});
test("calls depth as null", () => {
var array1 = [1, 2, [3, 4, [5, 6, [7, 8]]]];
expect(array1.flat(null)).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
expect(array1.flat(NaN)).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
});
test("calls depth as non integer", () => {
var array1 = [1, 2, [3, 4, [5, 6, [7, 8]]]];
expect(array1.flat("depth")).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
expect(array1.flat("2")).toEqual([1, 2, 3, 4, 5, 6, [7, 8]]);
expect(array1.flat(2.1)).toEqual([1, 2, 3, 4, 5, 6, [7, 8]]);
expect(array1.flat(0.7)).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
expect(array1.flat([2])).toEqual([1, 2, 3, 4, 5, 6, [7, 8]]);
expect(array1.flat([2, 1])).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
expect(array1.flat({})).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
expect(array1.flat({ depth: 2 })).toEqual([1, 2, [3, 4, [5, 6, [7, 8]]]]);
});
});