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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.
50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
import assert from 'assert';
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import lodashStable from 'lodash';
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import { slice, _ } from './utils.js';
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describe('rest', function() {
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function fn(a, b, c) {
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return slice.call(arguments);
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}
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it('should apply a rest parameter to `func`', function() {
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var rest = _.rest(fn);
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assert.deepStrictEqual(rest(1, 2, 3, 4), [1, 2, [3, 4]]);
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});
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it('should work with `start`', function() {
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var rest = _.rest(fn, 1);
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assert.deepStrictEqual(rest(1, 2, 3, 4), [1, [2, 3, 4]]);
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});
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it('should treat `start` as `0` for `NaN` or negative values', function() {
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var values = [-1, NaN, 'a'],
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expected = lodashStable.map(values, lodashStable.constant([[1, 2, 3, 4]]));
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var actual = lodashStable.map(values, function(value) {
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var rest = _.rest(fn, value);
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return rest(1, 2, 3, 4);
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});
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assert.deepStrictEqual(actual, expected);
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});
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it('should coerce `start` to an integer', function() {
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var rest = _.rest(fn, 1.6);
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assert.deepStrictEqual(rest(1, 2, 3), [1, [2, 3]]);
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});
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it('should use an empty array when `start` is not reached', function() {
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var rest = _.rest(fn);
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assert.deepStrictEqual(rest(1), [1, undefined, []]);
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});
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it('should work on functions with more than three parameters', function() {
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var rest = _.rest(function(a, b, c, d) {
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return slice.call(arguments);
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});
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assert.deepStrictEqual(rest(1, 2, 3, 4, 5), [1, 2, 3, [4, 5]]);
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});
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});
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