exiftool-vendored/dist/Array.spec.js

Efficient, cross-platform access to ExifTool

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const Array_1 = require("./Array");
const Times_1 = require("./Times");
const _chai_spec_1 = require("./_chai.spec");
describe("Array", () => {
    describe("compact()", () => {
        it("removes undefined and nulls but no falsy values", () => {
            (0, _chai_spec_1.expect)((0, Array_1.compact)([undefined, 1, null, 0, false, ""])).to.eql([
                1,
                0,
                false,
                "",
            ]);
        });
    });
    describe("filterInPlace()", () => {
        it("no-ops for always-true predicates", () => {
            const arr = (0, Times_1.times)(5, (i) => i);
            const exp = (0, Times_1.times)(5, (i) => i);
            (0, _chai_spec_1.expect)((0, Array_1.filterInPlace)(arr, () => true)).to.eql(exp);
            (0, _chai_spec_1.expect)(arr).to.eql(exp);
        });
        it("removes all items for always-false predicates", () => {
            const arr = (0, Times_1.times)(5, (i) => i);
            const exp = [];
            (0, _chai_spec_1.expect)((0, Array_1.filterInPlace)(arr, () => false)).to.eql(exp);
            (0, _chai_spec_1.expect)(arr).to.eql(exp);
        });
        it("removes filtered items in the source array", () => {
            const arr = (0, Times_1.times)(5, (i) => i);
            const exp = [0, 2, 4];
            (0, _chai_spec_1.expect)((0, Array_1.filterInPlace)(arr, (i) => i % 2 === 0)).to.eql(exp);
            (0, _chai_spec_1.expect)(arr).to.eql(exp);
        });
    });
    describe("uniq()", () => {
        it("removes dupes and orders first-one-in", () => {
            (0, _chai_spec_1.expect)((0, Array_1.uniq)([1, 1, 2, 3, 4, 5, 3, 2, 1, 2, 3, 4, 3])).to.eql([
                1, 2, 3, 4, 5,
            ]);
        });
    });
    describe("shallowArrayEql", () => {
        for (const { a, b, exp } of [
            { a: [], b: undefined, exp: false },
            { a: [1], b: [], exp: false },
            { a: [1], b: [1], exp: true },
            { a: [1], b: [1, 2], exp: false },
            { a: [2, 1], b: [1, 2], exp: false },
            { a: ["a", 1], b: ["a", 1], exp: true },
            { a: ["a", 1], b: ["a ", 1], exp: false },
        ]) {
            it(`(${JSON.stringify(a)}, ${JSON.stringify(b)}) -> ${exp}`, () => {
                (0, _chai_spec_1.expect)((0, Array_1.shallowArrayEql)(a, b)).to.eql(exp);
            });
        }
    });
    describe("sortBy", () => {
        const arr = Object.freeze([
            { s: "a", i: 0 },
            { s: "b", i: 1 },
            { s: "c", i: 2 },
            { s: "d", i: 0 },
            { s: "e", i: 1 },
            { s: "f", i: 2 },
            { s: "g", i: 0 },
            { s: "h", i: 1 },
            { s: "i", i: 2 },
        ]);
        it("maintains sort order", () => {
            // This will error if it tries to mutate, as it's frozen:
            const result = (0, Array_1.sortBy)(arr, (ea) => ea.i);
            (0, _chai_spec_1.expect)(arr.map((ea) => ea.s).join("")).to.eql("abcdefghi");
            (0, _chai_spec_1.expect)(result.map((ea) => ea.s).join("")).to.eql("adgbehcfi");
        });
        it("sorts case as expected", () => {
            const result = (0, Array_1.sortBy)(["a", "b", "Aa", "Bb", "aa", "bb"], (ea) => ea);
            (0, _chai_spec_1.expect)(result).to.eql(["a", "aa", "Aa", "b", "bb", "Bb"]);
        });
    });
    describe("leastBy", () => {
        it("should return undefined when the array is empty", () => {
            const emptyArray = [];
            const result = (0, Array_1.leastBy)(emptyArray, (n) => n);
            (0, _chai_spec_1.expect)(result).to.eql(undefined);
        });
        it("should handle all null/undefined values", () => {
            const allNull = [null, undefined, null, undefined];
            const result = (0, Array_1.leastBy)(allNull, (n) => n);
            (0, _chai_spec_1.expect)(result).to.eql(undefined);
        });
        it("should handle arrays with undefined values", () => {
            const mixedArray = [3, undefined, 1, 4, null, 2];
            const result = (0, Array_1.leastBy)(mixedArray, (n) => n);
            (0, _chai_spec_1.expect)(result).to.equal(1);
        });
        it("should return the element with the least value when all elements are valid", () => {
            const numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5];
            const result = (0, Array_1.leastBy)(numbers, (n) => n);
            (0, _chai_spec_1.expect)(result).to.equal(1);
        });
        it("should return the nearest element", () => {
            const numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5];
            const result = (0, Array_1.leastBy)(numbers, (n) => Math.abs(n - 7));
            (0, _chai_spec_1.expect)(result).to.equal(6);
        });
        it("should return the first occurrence of the least value", () => {
            const numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5];
            const result = (0, Array_1.leastBy)(numbers, (n) => n);
            (0, _chai_spec_1.expect)(result).to.equal(1);
            (0, _chai_spec_1.expect)(numbers.indexOf(result)).to.equal(1); // Check if it's the first occurrence
        });
        it("should work with custom comparison functions", () => {
            const words = ["apple", "banana", "cherry", "date"];
            const result = (0, Array_1.leastBy)(words, (word) => word.length);
            (0, _chai_spec_1.expect)(result).to.equal("date");
        });
        it("should work with objects and custom property extraction", () => {
            const objects = [
                { name: "Alice", age: 30 },
                { name: "Bob", age: 25 },
                { name: "Charlie", age: 35 },
                { name: "Dianne", age: 25 }, // < prefer the lowest-indexed object
            ];
            const result = (0, Array_1.leastBy)(objects, (obj) => obj.age);
            (0, _chai_spec_1.expect)(result).to.deep.equal({ name: "Bob", age: 25 });
        });
    });
});
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