| 1 | 'use strict';
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| 2 |
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| 3 | var isOneOf = require('../src/oneOf'),
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| 4 | assert = require('chai').assert;
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| 5 |
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| 6 | describe('oneOf', function() {
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| 7 | var ALLOWED_VALUES = [1, '2', 'test'],
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| 8 | VALID_VALUE = '2';
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| 9 |
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| 10 | it('throws an error if less than 2 allowed values provided', function() {
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| 11 | assert.throws(function() {
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| 12 | isOneOf()(VALID_VALUE);
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| 13 | }, Error, 'At least 2 allowed values are required');
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| 14 |
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| 15 | assert.throws(function() {
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| 16 | isOneOf(1)(VALID_VALUE);
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| 17 | }, Error, 'At least 2 allowed values are required');
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| 18 | });
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| 19 |
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| 20 | it('always returns a function', function() {
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| 21 | assert.ok(isOneOf.apply(this, ALLOWED_VALUES) instanceof Function);
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| 22 | });
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| 23 |
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| 24 | it('checks whether a value is equal to one of allowed values', function() {
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| 25 | var predicate = isOneOf.apply(this, ALLOWED_VALUES);
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| 26 |
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| 27 | assert.ok(predicate(VALID_VALUE));
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| 28 | assert.ok(!predicate(10));
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| 29 | assert.ok(!predicate());
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| 30 | });
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| 31 |
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| 32 | });
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