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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.
101 lines
3.4 KiB
JavaScript
101 lines
3.4 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { _, LARGE_ARRAY_SIZE, isEven, square } from './utils.js';
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describe('filter methods', function() {
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lodashStable.each(['filter', 'reject'], function(methodName) {
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var array = [1, 2, 3, 4],
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func = _[methodName],
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isFilter = methodName == 'filter',
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objects = [{ 'a': 0 }, { 'a': 1 }];
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it('`_.' + methodName + '` should not modify the resulting value from within `predicate`', function() {
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var actual = func([0], function(value, index, array) {
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array[index] = 1;
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return isFilter;
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});
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assert.deepStrictEqual(actual, [0]);
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});
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it('`_.' + methodName + '` should work with `_.property` shorthands', function() {
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assert.deepStrictEqual(func(objects, 'a'), [objects[isFilter ? 1 : 0]]);
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});
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it('`_.' + methodName + '` should work with `_.matches` shorthands', function() {
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assert.deepStrictEqual(func(objects, objects[1]), [objects[isFilter ? 1 : 0]]);
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});
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it('`_.' + methodName + '` should not modify wrapped values', function() {
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var wrapped = _(array);
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var actual = wrapped[methodName](function(n) {
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return n < 3;
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});
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assert.deepEqual(actual.value(), isFilter ? [1, 2] : [3, 4]);
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actual = wrapped[methodName](function(n) {
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return n > 2;
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});
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assert.deepEqual(actual.value(), isFilter ? [3, 4] : [1, 2]);
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});
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it('`_.' + methodName + '` should work in a lazy sequence', function() {
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var array = lodashStable.range(LARGE_ARRAY_SIZE + 1),
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predicate = function(value) { return isFilter ? isEven(value) : !isEven(value); };
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var object = lodashStable.zipObject(lodashStable.times(LARGE_ARRAY_SIZE, function(index) {
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return ['key' + index, index];
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}));
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var actual = _(array).slice(1).map(square)[methodName](predicate).value();
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assert.deepEqual(actual, _[methodName](lodashStable.map(array.slice(1), square), predicate));
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actual = _(object).mapValues(square)[methodName](predicate).value();
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assert.deepEqual(actual, _[methodName](lodashStable.mapValues(object, square), predicate));
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});
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it('`_.' + methodName + '` should provide correct `predicate` arguments in a lazy sequence', function() {
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var args,
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array = lodashStable.range(LARGE_ARRAY_SIZE + 1),
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expected = [1, 0, lodashStable.map(array.slice(1), square)];
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_(array).slice(1)[methodName](function(value, index, array) {
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args || (args = slice.call(arguments));
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}).value();
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assert.deepEqual(args, [1, 0, array.slice(1)]);
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args = undefined;
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_(array).slice(1).map(square)[methodName](function(value, index, array) {
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args || (args = slice.call(arguments));
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}).value();
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assert.deepEqual(args, expected);
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args = undefined;
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_(array).slice(1).map(square)[methodName](function(value, index) {
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args || (args = slice.call(arguments));
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}).value();
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assert.deepEqual(args, expected);
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args = undefined;
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_(array).slice(1).map(square)[methodName](function(value) {
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args || (args = slice.call(arguments));
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}).value();
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assert.deepEqual(args, [1]);
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args = undefined;
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_(array).slice(1).map(square)[methodName](function() {
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args || (args = slice.call(arguments));
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}).value();
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assert.deepEqual(args, expected);
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});
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});
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});
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