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78 lines
2.9 KiB
JavaScript
78 lines
2.9 KiB
JavaScript
var assert = require('assert');
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var math = require('../../../index');
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var isNaN = math.isNaN;
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var bignumber = math.bignumber;
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var fraction = math.fraction;
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var complex = math.complex;
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var Unit = math.type.Unit;
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var Fraction = math.type.Fraction;
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describe('isNegative', function() {
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it('should test whether a number is NaN', function() {
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assert.strictEqual(isNaN(0), false);
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assert.strictEqual(isNaN(2), false);
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assert.strictEqual(isNaN(-3), false);
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assert.strictEqual(isNaN(Infinity), false);
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assert.strictEqual(isNaN(-Infinity), false);
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assert.strictEqual(isNaN(NaN), true);
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});
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it('should test whether a boolean is NaN', function() {
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assert.strictEqual(isNaN(true), false);
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assert.strictEqual(isNaN(false), false);
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});
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it('should test whether a BigNumber is NaN', function() {
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assert.strictEqual(isNaN(bignumber(0)), false);
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assert.strictEqual(isNaN(bignumber(2)), false);
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assert.strictEqual(isNaN(bignumber(-3)), false);
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assert.strictEqual(isNaN(bignumber(Infinity)), false);
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assert.strictEqual(isNaN(bignumber(-Infinity)), false);
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assert.strictEqual(isNaN(bignumber(NaN)), true);
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});
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it('should test whether a Fraction is NaN', function() {
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assert.strictEqual(isNaN(fraction(2)), false);
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assert.strictEqual(isNaN(fraction(-3)), false);
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assert.strictEqual(isNaN(fraction(0)), false);
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});
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it('should test whether a unit is NaN', function() {
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assert.strictEqual(isNaN(new Unit(0, 'm')), false);
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assert.strictEqual(isNaN(new Unit(0, 'kB')), false);
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assert.strictEqual(isNaN(new Unit(5, 'cm')), false);
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assert.strictEqual(isNaN(new Unit(-3, 'inch')), false);
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assert.strictEqual(isNaN(new Unit(NaN, 'inch')), true);
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});
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it('should test whether a complex number contains NaN', function () {
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assert.strictEqual(isNaN(complex(0, 0)), false);
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assert.strictEqual(isNaN(complex(NaN, 0)), true);
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assert.strictEqual(isNaN(complex(0, NaN)), true);
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assert.strictEqual(isNaN(complex(NaN, NaN)), true);
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});
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it('should test whether a string contains a NaN', function() {
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assert.strictEqual(isNaN('2'), false);
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assert.strictEqual(isNaN('-2'), false);
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assert.strictEqual(isNaN('0'), false);
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assert.throws(function () {isNaN('NaN')}, /Error: Cannot convert "NaN" to a number/);
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assert.strictEqual(isNaN(''), false);
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});
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it('should test isNegative element wise on an Array', function() {
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assert.deepEqual(isNaN([0, 5, -2, NaN]), [false, false, false, true]);
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});
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it('should test isNegative element wise on a Matrix', function() {
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assert.deepEqual(isNaN(math.matrix([0, 5, -2, NaN])), math.matrix([false, false, false, true]));
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});
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it('should throw an error in case of unsupported data types', function() {
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assert.throws(function () {isNaN(new Date())}, /TypeError: Unexpected type of argument/);
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assert.throws(function () {isNaN({})}, /TypeError: Unexpected type of argument/);
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});
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});
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