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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.
57 lines
2.0 KiB
JavaScript
57 lines
2.0 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { _, symbol } from './utils.js';
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describe('math operator methods', function() {
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lodashStable.each(['add', 'divide', 'multiply', 'subtract'], function(methodName) {
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var func = _[methodName],
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isAddSub = methodName == 'add' || methodName == 'subtract';
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it('`_.' + methodName + '` should return `' + (isAddSub ? 0 : 1) + '` when no arguments are given', function() {
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assert.strictEqual(func(), isAddSub ? 0 : 1);
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});
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it('`_.' + methodName + '` should work with only one defined argument', function() {
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assert.strictEqual(func(6), 6);
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assert.strictEqual(func(6, undefined), 6);
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assert.strictEqual(func(undefined, 4), 4);
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});
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it('`_.' + methodName + '` should preserve the sign of `0`', function() {
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var values = [0, '0', -0, '-0'],
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expected = [[0, Infinity], ['0', Infinity], [-0, -Infinity], ['-0', -Infinity]];
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lodashStable.times(2, function(index) {
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var actual = lodashStable.map(values, function(value) {
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var result = index ? func(undefined, value) : func(value);
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return [result, 1 / result];
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});
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assert.deepStrictEqual(actual, expected);
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});
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});
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it('`_.' + methodName + '` should convert objects to `NaN`', function() {
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assert.deepStrictEqual(func(0, {}), NaN);
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assert.deepStrictEqual(func({}, 0), NaN);
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});
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it('`_.' + methodName + '` should convert symbols to `NaN`', function() {
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if (Symbol) {
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assert.deepStrictEqual(func(0, symbol), NaN);
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assert.deepStrictEqual(func(symbol, 0), NaN);
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}
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});
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it('`_.' + methodName + '` should return an unwrapped value when implicitly chaining', function() {
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var actual = _(1)[methodName](2);
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assert.notOk(actual instanceof _);
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});
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it('`_.' + methodName + '` should return a wrapped value when explicitly chaining', function() {
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var actual = _(1).chain()[methodName](2);
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assert.ok(actual instanceof _);
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});
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});
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});
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