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wip: migrate to bun
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63
test/indexOf-methods.spec.ts
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63
test/indexOf-methods.spec.ts
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import assert from 'node:assert';
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import lodashStable from 'lodash';
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import { _, falsey } from './utils';
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describe('indexOf methods', () => {
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lodashStable.each(
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['indexOf', 'lastIndexOf', 'sortedIndexOf', 'sortedLastIndexOf'],
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(methodName) => {
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const func = _[methodName],
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isIndexOf = !/last/i.test(methodName),
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isSorted = /^sorted/.test(methodName);
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it(`\`_.${methodName}\` should accept a falsey \`array\``, () => {
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const expected = lodashStable.map(falsey, lodashStable.constant(-1));
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const actual = lodashStable.map(falsey, (array, index) => {
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try {
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return index ? func(array) : func();
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} catch (e) {}
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});
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assert.deepStrictEqual(actual, expected);
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});
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it(`\`_.${methodName}\` should return \`-1\` for an unmatched value`, () => {
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const array = [1, 2, 3],
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empty = [];
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assert.strictEqual(func(array, 4), -1);
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assert.strictEqual(func(array, 4, true), -1);
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assert.strictEqual(func(array, undefined, true), -1);
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assert.strictEqual(func(empty, undefined), -1);
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assert.strictEqual(func(empty, undefined, true), -1);
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});
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it(`\`_.${methodName}\` should not match values on empty arrays`, () => {
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const array = [];
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array[-1] = 0;
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assert.strictEqual(func(array, undefined), -1);
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assert.strictEqual(func(array, 0, true), -1);
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});
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it(`\`_.${methodName}\` should match \`NaN\``, () => {
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const array = isSorted ? [1, 2, NaN, NaN] : [1, NaN, 3, NaN, 5, NaN];
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if (isSorted) {
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assert.strictEqual(func(array, NaN, true), isIndexOf ? 2 : 3);
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} else {
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assert.strictEqual(func(array, NaN), isIndexOf ? 1 : 5);
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assert.strictEqual(func(array, NaN, 2), isIndexOf ? 3 : 1);
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assert.strictEqual(func(array, NaN, -2), isIndexOf ? 5 : 3);
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}
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});
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it(`\`_.${methodName}\` should match \`-0\` as \`0\``, () => {
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assert.strictEqual(func([-0], 0), 0);
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assert.strictEqual(func([0], -0), 0);
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});
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},
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);
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});
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