46 lines
1.6 KiB
JavaScript
46 lines
1.6 KiB
JavaScript
import { expect, test, describe } from "vitest";
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import map from "./map.js";
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describe("map", () => {
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test("applies updates to each item in an array", () => {
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const object = [0, 1, 2];
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const inc = (x) => x + 1;
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const result = map(object, inc);
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expect(result).to.eql([1, 2, 3]);
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});
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test("applies updates to each value in an object", () => {
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const object = { a: 0, b: 1, c: 2 };
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const inc = (x) => x + 1;
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const result = map(inc)(object);
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expect(result).to.eql({ a: 1, b: 2, c: 3 });
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});
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test("can update with a regular updates object", () => {
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const object = [{ a: 0 }, { a: 0 }];
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const result = map({ a: 1 })(object);
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expect(result).to.eql([{ a: 1 }, { a: 1 }]);
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});
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test("returns the same object if no updates are made", () => {
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const array = [0, 1];
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const ident = (x) => x;
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let result = map(ident)(array);
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expect(result).to.equal(array);
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const object = { a: 0 };
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result = map(ident)(object);
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expect(result).to.equal(object);
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});
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test("passes the key or index as the second parameter to the iteratee", () => {
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const object = {
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a: { x: 0 },
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b: [3, 3],
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};
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const setToKey = (_, key) => key;
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const result = map(object, map(setToKey));
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expect(result).to.eql({
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a: { x: "x" },
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b: [0, 1],
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});
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});
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test("freezes the result", () => {
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expect(Object.isFrozen(map({}, {}))).to.be.true;
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});
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});
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//# sourceMappingURL=map.test.js.map
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