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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.
59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
import assert from 'assert';
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import clamp from '../clamp.js';
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describe('clamp', function() {
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it('should work with a `max`', function() {
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assert.strictEqual(clamp(5, 3), 3);
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assert.strictEqual(clamp(1, 3), 1);
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});
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it('should clamp negative numbers', function() {
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assert.strictEqual(clamp(-10, -5, 5), -5);
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assert.strictEqual(clamp(-10.2, -5.5, 5.5), -5.5);
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assert.strictEqual(clamp(-Infinity, -5, 5), -5);
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});
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it('should clamp positive numbers', function() {
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assert.strictEqual(clamp(10, -5, 5), 5);
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assert.strictEqual(clamp(10.6, -5.6, 5.4), 5.4);
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assert.strictEqual(clamp(Infinity, -5, 5), 5);
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});
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it('should not alter negative numbers in range', function() {
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assert.strictEqual(clamp(-4, -5, 5), -4);
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assert.strictEqual(clamp(-5, -5, 5), -5);
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assert.strictEqual(clamp(-5.5, -5.6, 5.6), -5.5);
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});
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it('should not alter positive numbers in range', function() {
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assert.strictEqual(clamp(4, -5, 5), 4);
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assert.strictEqual(clamp(5, -5, 5), 5);
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assert.strictEqual(clamp(4.5, -5.1, 5.2), 4.5);
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});
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it('should not alter `0` in range', function() {
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assert.strictEqual(1 / clamp(0, -5, 5), Infinity);
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});
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it('should clamp to `0`', function() {
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assert.strictEqual(1 / clamp(-10, 0, 5), Infinity);
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});
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it('should not alter `-0` in range', function() {
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assert.strictEqual(1 / clamp(-0, -5, 5), -Infinity);
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});
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it('should clamp to `-0`', function() {
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assert.strictEqual(1 / clamp(-10, -0, 5), -Infinity);
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});
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it('should return `NaN` when `number` is `NaN`', function() {
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assert.deepStrictEqual(clamp(NaN, -5, 5), NaN);
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});
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it('should coerce `min` and `max` of `NaN` to `0`', function() {
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assert.deepStrictEqual(clamp(1, -5, NaN), 0);
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assert.deepStrictEqual(clamp(-1, NaN, 5), 0);
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});
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});
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