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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.
83 lines
2.9 KiB
JavaScript
83 lines
2.9 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { _, falsey } from './utils.js';
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describe('range methods', function() {
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lodashStable.each(['range', 'rangeRight'], function(methodName) {
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var func = _[methodName],
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isRange = methodName == 'range';
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function resolve(range) {
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return isRange ? range : range.reverse();
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}
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it('`_.' + methodName + '` should infer the sign of `step` when only `end` is given', function() {
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assert.deepStrictEqual(func(4), resolve([0, 1, 2, 3]));
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assert.deepStrictEqual(func(-4), resolve([0, -1, -2, -3]));
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});
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it('`_.' + methodName + '` should infer the sign of `step` when only `start` and `end` are given', function() {
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assert.deepStrictEqual(func(1, 5), resolve([1, 2, 3, 4]));
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assert.deepStrictEqual(func(5, 1), resolve([5, 4, 3, 2]));
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});
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it('`_.' + methodName + '` should work with a `start`, `end`, and `step`', function() {
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assert.deepStrictEqual(func(0, -4, -1), resolve([0, -1, -2, -3]));
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assert.deepStrictEqual(func(5, 1, -1), resolve([5, 4, 3, 2]));
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assert.deepStrictEqual(func(0, 20, 5), resolve([0, 5, 10, 15]));
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});
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it('`_.' + methodName + '` should support a `step` of `0`', function() {
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assert.deepStrictEqual(func(1, 4, 0), [1, 1, 1]);
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});
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it('`_.' + methodName + '` should work with a `step` larger than `end`', function() {
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assert.deepStrictEqual(func(1, 5, 20), [1]);
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});
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it('`_.' + methodName + '` should work with a negative `step`', function() {
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assert.deepStrictEqual(func(0, -4, -1), resolve([0, -1, -2, -3]));
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assert.deepStrictEqual(func(21, 10, -3), resolve([21, 18, 15, 12]));
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});
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it('`_.' + methodName + '` should support `start` of `-0`', function() {
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var actual = func(-0, 1);
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assert.strictEqual(1 / actual[0], -Infinity);
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});
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it('`_.' + methodName + '` should treat falsey `start` as `0`', function() {
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lodashStable.each(falsey, function(value, index) {
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if (index) {
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assert.deepStrictEqual(func(value), []);
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assert.deepStrictEqual(func(value, 1), [0]);
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} else {
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assert.deepStrictEqual(func(), []);
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}
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});
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});
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it('`_.' + methodName + '` should coerce arguments to finite numbers', function() {
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var actual = [
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func('1'),
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func('0', 1),
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func(0, 1, '1'),
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func(NaN),
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func(NaN, NaN)
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];
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assert.deepStrictEqual(actual, [[0], [0], [0], [], []]);
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});
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it('`_.' + methodName + '` should work as an iteratee for methods like `_.map`', function() {
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var array = [1, 2, 3],
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object = { 'a': 1, 'b': 2, 'c': 3 },
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expected = lodashStable.map([[0], [0, 1], [0, 1, 2]], resolve);
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lodashStable.each([array, object], function(collection) {
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var actual = lodashStable.map(collection, func);
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assert.deepStrictEqual(actual, expected);
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});
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});
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});
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});
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