79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
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// test approx itself...
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var assert = require('assert'),
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approx = require('../tools/approx');
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describe('approx', function() {
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it('should test equality of positive values', function() {
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approx.equal(1/3, 0.33333333);
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approx.equal(2, 2.000001);
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approx.equal(2, 1.999999);
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assert.throws(function () {approx.equal(2, 2.001)}, assert.AssertionError);
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assert.throws(function () {approx.equal(2, 1.999)}, assert.AssertionError);
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});
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it('should test equality of negative values', function() {
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approx.equal(-2, -2.000001);
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approx.equal(-2, -1.999999);
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assert.throws(function () {approx.equal(-2, -2.001)}, assert.AssertionError);
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assert.throws(function () {approx.equal(-2, -1.999)}, assert.AssertionError);
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});
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it('should test equality of very large values', function() {
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approx.equal(2e100, 2.000001e100);
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approx.equal(2e100, 1.999999e100);
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assert.throws(function () {approx.equal(2e100, 2.001e100)}, assert.AssertionError);
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assert.throws(function () {approx.equal(2e100, 1.999e100)}, assert.AssertionError);
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});
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it('should test equality of very small values', function() {
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approx.equal(2e-100, 2.000001e-100);
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approx.equal(2e-100, 1.999999e-100);
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assert.throws(function () {approx.equal(2e-100, 2.001e-100)}, assert.AssertionError);
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assert.throws(function () {approx.equal(2e-100, 1.999e-100)}, assert.AssertionError);
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});
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it('should test equality of NaN numbers', function() {
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// NaN values
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var a = NaN;
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var b = NaN;
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approx.equal(a, b);
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assert.throws(function () {approx.equal(NaN, 3)}, assert.AssertionError);
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assert.throws(function () {approx.equal(NaN, 'nonumber')}, assert.AssertionError);
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});
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it('should test equality when one of the values is zero', function() {
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// zero as one of the two values
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approx.equal(0, 1e-15);
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approx.equal(1e-15, 0);
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assert.throws(function () {approx.equal(0, 0.001)}, assert.AssertionError);
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});
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it('should test deep equality of arrays and objects', function() {
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approx.deepEqual({
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a: [1, 2, 3],
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b: [{c:4, d:5}]
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}, {
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a: [1.000001, 1.99999999, 3.000005],
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b: [{c:3.999999981, d:5.0000023}]
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});
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assert.throws(function () {approx.deepEqual({
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a: [1, 2, 3],
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b: [{c:4, d:5}]
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}, {
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a: [1.000001, 1.99999999, 3.000005],
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b: [{c:3.1, d:5.0000023}]
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})}, assert.AssertionError);
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assert.throws(function () {approx.deepEqual({
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a: [1, 2, 3],
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b: [{c:4, d:5}]
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}, {
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a: [1.001, 1.99999999, 3.000005],
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b: [{c:3, d:5.0000023}]
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})}, assert.AssertionError);
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});
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});
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