108 lines
4.1 KiB
JavaScript
108 lines
4.1 KiB
JavaScript
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import { expect, it, describe } from "vitest";
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import u from "./index.js";
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it("does not change anything if no updates are specified", () => {
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const object = { foo: 3, bar: [7, 5] };
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const result = u(object, {});
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expect(result).to.equal(object);
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});
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it("can update with fixed values", () => {
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const object = { foo: 3, bar: [7, 5] };
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const result = u(object, { foo: 4 });
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expect(result).to.deep.equal({ foo: 4, bar: [7, 5] });
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});
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it("returns the same instance if an update doesn't make changes", () => {
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const object = { foo: 3 };
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const result = u({ foo: 3 })(object);
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expect(result).to.equal(object);
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});
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it("can update a nested structure", () => {
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const object = { foo: { bar: 7, bam: 3 }, baz: 32 };
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const result = u({ foo: { bar: 8 } })(object);
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expect(result).to.deep.equal({ foo: { bar: 8, bam: 3 }, baz: 32 });
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});
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it("can update arrays", () => {
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const object = [1, 2, 3];
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const result = u({ 1: 7 })(object);
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expect(result).to.deep.equal([1, 7, 3]);
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});
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it("replaces the object outright if updates are a constant", () => {
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expect(u(3)({})).to.equal(3);
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expect(u(null)({})).to.be.null;
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});
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it("can add an element to an array", () => {
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const object = [];
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const result = u({ 0: 3 })(object);
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expect(result).to.eql([3]);
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});
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it("can update nested arrays", () => {
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const object = { foo: [1, 2, 3], bar: 9 };
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const result = u({ foo: { 1: 7 } })(object);
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expect(result).to.deep.equal({ foo: [1, 7, 3], bar: 9 });
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});
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it("can use functions to update values", () => {
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const inc = (i) => i + 1;
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const object = { foo: 3, bar: 4, baz: 7 };
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const result = u({ foo: inc, bar: inc })(object);
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expect(result).to.deep.equal({ foo: 4, bar: 5, baz: 7 });
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});
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it("can be partially applied", () => {
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const inc = (i) => i + 1;
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const object = { foo: 3 };
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const incFoo = u({ foo: inc });
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const result = incFoo(object);
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expect(result).to.deep.equal({ foo: 4 });
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});
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it("can update if the value is an array", () => {
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const object = {};
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const result = u({ foo: [0, 1] })(object);
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expect(result).to.deep.equal({ foo: [0, 1] });
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});
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it("can update when original object is undefined", () => {
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const result = u({ foo: [0, 1] })(undefined);
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expect(result).to.deep.equal({ foo: [0, 1] });
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});
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it("can take a function as the updater", () => {
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const result = u((i) => i + 1)(7);
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expect(result).to.eql(8);
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});
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it("deeply freezes the result", () => {
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const result = u({ foo: { bar: 3 } }, { foo: { bar: 0 } });
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expect(Object.isFrozen(result)).to.be.true;
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expect(Object.isFrozen(result.foo)).to.be.true;
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});
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it("assigns null values", () => {
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expect(u({ isNull: null }, {})).to.eql({ isNull: null });
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});
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it("defaults to an empty object when null or undefined", () => {
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let result = u({ a: { b: 0 } })({ a: null });
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expect(result).to.eql({ a: { b: 0 } });
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result = u({ a: { b: 0 } })({ a: undefined });
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expect(result).to.eql({ a: { b: 0 } });
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result = u({ a: { b: 0 } })({});
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expect(result).to.eql({ a: { b: 0 } });
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});
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it("preserves empty objects when empty updates are specified", () => {
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const result = u({ a: {} })({});
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expect(result).to.eql({ a: {} });
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});
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it("works with date objects", () => {
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const date = new Date();
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const result = u({ created: date })({});
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expect(result).toEqual({ created: date });
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});
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const expectU = (update, orig, expected) => expect(update(orig)).to.eql(expected);
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describe("u.omitted", () => {
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it("omit properties via u.omitted", () => {
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expectU(u({ a: u.omitted, b: (i) => i + 1 }), { a: 1, b: 2 }, { b: 3 });
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});
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it("omit array and object properties", () => {
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expectU(u({ a: u.omitted, b: "stuff", c: u.omitted }), { a: [1, 2, 3], b: "orig", c: { z: "bar" } }, { b: "stuff" });
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});
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it("deep omit", () => {
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expectU(u({ a: { b: u.omitted, c: "stuff" } }), { a: { b: "foo", z: "bar" } }, { a: { z: "bar", c: "stuff" } });
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});
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it("omitting an array item filters it out", () => {
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expectU(u({ 1: u.omitted }), ["a", "b", "c"], ["a", "c"]);
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});
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});
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//# sourceMappingURL=updeep.test.js.map
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