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* Install test dependencies. * Add initial test files. These files were created using a simplistic AST manipulator using `recast` to preserve formatting. There's bound to be a huge chunk of errors, but this serves as a good start. QUnit was replaced with Mocha, with ES2015 imports running via `esm`. As far as possible, QUnit-specific syntax has been replaced with Mocha's `describe` and `it`, while the native Node.js `assert` module is used for assertions. Files in the `test` directory ending in `.test.js` will be treated as test files. * Add initial passing files to test run.
100 lines
2.9 KiB
JavaScript
100 lines
2.9 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { args, falsey } from './utils.js';
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import findLast from '../findLast.js';
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describe('findLast', function() {
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var resolve = lodashStable.curry(lodashStable.eq);
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lodashStable.each({
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'an `arguments` object': args,
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'an array': [1, 2, 3]
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},
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function(collection, key) {
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var values = lodashStable.toArray(collection);
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it('should work with ' + key + ' and a positive `fromIndex`', function() {
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var expected = [
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values[1],
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undefined
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];
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var actual = [
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findLast(collection, resolve(values[1]), 1),
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findLast(collection, resolve(values[2]), 1)
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];
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assert.deepStrictEqual(actual, expected);
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});
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it('should work with ' + key + ' and a `fromIndex` >= `length`', function() {
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var indexes = [4, 6, Math.pow(2, 32), Infinity];
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var expected = lodashStable.map(indexes, lodashStable.constant([values[0], undefined, undefined]));
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var actual = lodashStable.map(indexes, function(fromIndex) {
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return [
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findLast(collection, resolve(1), fromIndex),
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findLast(collection, resolve(undefined), fromIndex),
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findLast(collection, resolve(''), fromIndex)
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];
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});
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assert.deepStrictEqual(actual, expected);
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});
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it('should work with ' + key + ' and treat falsey `fromIndex` values correctly', function() {
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var expected = lodashStable.map(falsey, function(value) {
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return value === undefined ? values[3] : undefined;
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});
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var actual = lodashStable.map(falsey, function(fromIndex) {
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return findLast(collection, resolve(values[3]), fromIndex);
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});
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assert.deepStrictEqual(actual, expected);
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});
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it('should work with ' + key + ' and coerce `fromIndex` to an integer', function() {
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var expected = [
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values[0],
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values[0],
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undefined
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];
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var actual = [
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findLast(collection, resolve(values[0]), 0.1),
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findLast(collection, resolve(values[0]), NaN),
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findLast(collection, resolve(values[2]), '1')
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];
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assert.deepStrictEqual(actual, expected);
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});
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it('should work with ' + key + ' and a negative `fromIndex`', function() {
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var expected = [
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values[1],
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undefined
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];
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var actual = [
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findLast(collection, resolve(values[1]), -2),
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findLast(collection, resolve(values[2]), -2)
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];
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assert.deepStrictEqual(actual, expected);
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});
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it('should work with ' + key + ' and a negative `fromIndex` <= `-length`', function() {
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var indexes = [-4, -6, -Infinity],
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expected = lodashStable.map(indexes, lodashStable.constant(values[0]));
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var actual = lodashStable.map(indexes, function(fromIndex) {
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return findLast(collection, resolve(values[0]), fromIndex);
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});
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assert.deepStrictEqual(actual, expected);
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});
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});
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});
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