688 lines
17 KiB
JavaScript
688 lines
17 KiB
JavaScript
describe('Core helper tests', function() {
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var helpers;
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beforeAll(function() {
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helpers = window.Chart.helpers;
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});
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it('should iterate over an array and pass the extra data to that function', function() {
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var testData = [0, 9, "abc"];
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var scope = {}; // fake out the scope and ensure that 'this' is the correct thing
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helpers.each(testData, function(item, index) {
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expect(item).not.toBe(undefined);
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expect(index).not.toBe(undefined);
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expect(testData[index]).toBe(item);
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expect(this).toBe(scope);
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}, scope);
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// Reverse iteration
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var iterated = [];
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helpers.each(testData, function(item, index) {
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expect(item).not.toBe(undefined);
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expect(index).not.toBe(undefined);
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expect(testData[index]).toBe(item);
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expect(this).toBe(scope);
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iterated.push(item);
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}, scope, true);
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expect(iterated.slice().reverse()).toEqual(testData);
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});
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it('should iterate over properties in an object', function() {
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var testData = {
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myProp1: 'abc',
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myProp2: 276,
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myProp3: ['a', 'b']
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};
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helpers.each(testData, function(value, key) {
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if (key === 'myProp1') {
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expect(value).toBe('abc');
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} else if (key === 'myProp2') {
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expect(value).toBe(276);
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} else if (key === 'myProp3') {
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expect(value).toEqual(['a', 'b']);
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} else {
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expect(false).toBe(true);
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}
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});
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});
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it('should not error when iterating over a null object', function() {
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expect(function() {
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helpers.each(undefined);
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}).not.toThrow();
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});
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it('should clone an object', function() {
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var testData = {
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myProp1: 'abc',
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myProp2: ['a', 'b'],
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myProp3: {
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myProp4: 5,
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myProp5: [1, 2]
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}
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};
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var clone = helpers.clone(testData);
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expect(clone).toEqual(testData);
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expect(clone).not.toBe(testData);
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expect(clone.myProp2).not.toBe(testData.myProp2);
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expect(clone.myProp3).not.toBe(testData.myProp3);
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expect(clone.myProp3.myProp5).not.toBe(testData.myProp3.myProp5);
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});
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it('should extend an object', function() {
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var original = {
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myProp1: 'abc',
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myProp2: 56
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};
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var extension = {
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myProp3: [2, 5, 6],
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myProp2: 0
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};
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helpers.extend(original, extension);
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expect(original).toEqual({
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myProp1: 'abc',
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myProp2: 0,
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myProp3: [2, 5, 6],
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});
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});
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it('should merge a normal config without scales', function() {
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var baseConfig = {
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valueProp: 5,
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arrayProp: [1, 2, 3, 4, 5, 6],
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objectProp: {
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prop1: 'abc',
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prop2: 56
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}
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};
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var toMerge = {
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valueProp2: null,
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arrayProp: ['a', 'c'],
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objectProp: {
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prop1: 'c',
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prop3: 'prop3'
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}
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};
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var merged = helpers.configMerge(baseConfig, toMerge);
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expect(merged).toEqual({
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valueProp: 5,
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valueProp2: null,
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arrayProp: ['a', 'c', 3, 4, 5, 6],
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objectProp: {
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prop1: 'c',
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prop2: 56,
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prop3: 'prop3'
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}
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});
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});
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it('should merge arrays containing objects', function() {
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var baseConfig = {
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arrayProp: [{
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prop1: 'abc',
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prop2: 56
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}],
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};
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var toMerge = {
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arrayProp: [{
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prop1: 'myProp1',
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prop3: 'prop3'
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}, 2, {
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prop1: 'myProp1'
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}],
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};
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var merged = helpers.configMerge(baseConfig, toMerge);
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expect(merged).toEqual({
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arrayProp: [{
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prop1: 'myProp1',
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prop2: 56,
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prop3: 'prop3'
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},
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2, {
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prop1: 'myProp1'
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}
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],
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});
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});
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it('should merge scale configs', function() {
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var baseConfig = {
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scales: {
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prop1: {
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abc: 123,
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def: '456'
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},
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prop2: 777,
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yAxes: [{
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type: 'linear',
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}, {
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type: 'log'
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}]
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}
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};
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var toMerge = {
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scales: {
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prop1: {
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def: 'bbb',
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ghi: 78
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},
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prop2: null,
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yAxes: [{
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type: 'linear',
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axisProp: 456
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}, {
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// pulls in linear default config since axis type changes
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type: 'linear',
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position: 'right'
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}, {
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// Pulls in linear default config since axis not in base
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type: 'linear'
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}]
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}
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};
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var merged = helpers.configMerge(baseConfig, toMerge);
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expect(merged).toEqual({
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scales: {
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prop1: {
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abc: 123,
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def: 'bbb',
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ghi: 78
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},
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prop2: null,
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yAxes: [{
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type: 'linear',
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axisProp: 456
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}, {
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display: true,
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gridLines: {
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color: "rgba(0, 0, 0, 0.1)",
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drawOnChartArea: true,
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drawTicks: true, // draw ticks extending towards the label
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tickMarkLength: 10,
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lineWidth: 1,
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offsetGridLines: false,
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display: true,
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zeroLineColor: "rgba(0,0,0,0.25)",
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zeroLineWidth: 1,
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},
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position: "right",
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scaleLabel: {
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labelString: '',
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display: false,
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},
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ticks: {
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beginAtZero: false,
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maxRotation: 50,
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mirror: false,
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padding: 10,
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reverse: false,
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display: true,
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callback: merged.scales.yAxes[1].ticks.callback, // make it nicer, then check explicitly below
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autoSkip: true,
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autoSkipPadding: 0
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},
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type: 'linear'
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}, {
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display: true,
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gridLines: {
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color: "rgba(0, 0, 0, 0.1)",
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drawOnChartArea: true,
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drawTicks: true, // draw ticks extending towards the label,
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tickMarkLength: 10,
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lineWidth: 1,
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offsetGridLines: false,
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display: true,
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zeroLineColor: "rgba(0,0,0,0.25)",
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zeroLineWidth: 1,
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},
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position: "left",
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scaleLabel: {
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labelString: '',
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display: false,
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},
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ticks: {
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beginAtZero: false,
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maxRotation: 50,
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mirror: false,
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padding: 10,
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reverse: false,
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display: true,
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callback: merged.scales.yAxes[2].ticks.callback, // make it nicer, then check explicitly below
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autoSkip: true,
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autoSkipPadding: 0
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},
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type: 'linear'
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}]
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}
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});
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// Are these actually functions
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expect(merged.scales.yAxes[1].ticks.callback).toEqual(jasmine.any(Function));
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expect(merged.scales.yAxes[2].ticks.callback).toEqual(jasmine.any(Function));
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});
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it('should get value or default', function() {
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expect(helpers.getValueAtIndexOrDefault(98, 0, 56)).toBe(98);
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expect(helpers.getValueAtIndexOrDefault(0, 0, 56)).toBe(0);
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expect(helpers.getValueAtIndexOrDefault(undefined, undefined, 56)).toBe(56);
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expect(helpers.getValueAtIndexOrDefault([1, 2, 3], 1, 100)).toBe(2);
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expect(helpers.getValueAtIndexOrDefault([1, 2, 3], 3, 100)).toBe(100);
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});
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it('should filter an array', function() {
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var data = [-10, 0, 6, 0, 7];
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var callback = function(item) {
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return item > 2
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};
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expect(helpers.where(data, callback)).toEqual([6, 7]);
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expect(helpers.findNextWhere(data, callback)).toEqual(6);
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expect(helpers.findNextWhere(data, callback, 2)).toBe(7);
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expect(helpers.findNextWhere(data, callback, 4)).toBe(undefined);
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expect(helpers.findPreviousWhere(data, callback)).toBe(7);
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expect(helpers.findPreviousWhere(data, callback, 3)).toBe(6);
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expect(helpers.findPreviousWhere(data, callback, 0)).toBe(undefined);
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});
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it('should get the correct sign', function() {
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expect(helpers.sign(0)).toBe(0);
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expect(helpers.sign(10)).toBe(1);
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expect(helpers.sign(-5)).toBe(-1);
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});
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it('should do a log10 operation', function() {
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expect(helpers.log10(0)).toBe(-Infinity);
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expect(helpers.log10(1)).toBe(0);
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expect(helpers.log10(1000)).toBeCloseTo(3, 1e-9);
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});
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it('should correctly determine if two numbers are essentially equal', function() {
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expect(helpers.almostEquals(0, Number.EPSILON, 2 * Number.EPSILON)).toBe(true);
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expect(helpers.almostEquals(1, 1.1, 0.0001)).toBe(false);
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expect(helpers.almostEquals(1e30, 1e30 + Number.EPSILON, 0)).toBe(false);
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expect(helpers.almostEquals(1e30, 1e30 + Number.EPSILON, 2 * Number.EPSILON)).toBe(true);
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});
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it('should generate integer ids', function() {
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var uid = helpers.uid();
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expect(uid).toEqual(jasmine.any(Number));
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expect(helpers.uid()).toBe(uid + 1);
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expect(helpers.uid()).toBe(uid + 2);
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expect(helpers.uid()).toBe(uid + 3);
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});
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it('should detect a number', function() {
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expect(helpers.isNumber(123)).toBe(true);
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expect(helpers.isNumber('123')).toBe(true);
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expect(helpers.isNumber(null)).toBe(false);
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expect(helpers.isNumber(NaN)).toBe(false);
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expect(helpers.isNumber(undefined)).toBe(false);
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expect(helpers.isNumber('cbc')).toBe(false);
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});
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it('should convert between radians and degrees', function() {
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expect(helpers.toRadians(180)).toBe(Math.PI);
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expect(helpers.toRadians(90)).toBe(0.5 * Math.PI);
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expect(helpers.toDegrees(Math.PI)).toBe(180);
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expect(helpers.toDegrees(Math.PI * 3 / 2)).toBe(270);
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});
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it('should get an angle from a point', function() {
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var center = {
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x: 0,
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y: 0
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};
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expect(helpers.getAngleFromPoint(center, {
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x: 0,
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y: 10
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})).toEqual({
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angle: Math.PI / 2,
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distance: 10,
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});
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expect(helpers.getAngleFromPoint(center, {
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x: Math.sqrt(2),
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y: Math.sqrt(2)
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})).toEqual({
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angle: Math.PI / 4,
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distance: 2
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});
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expect(helpers.getAngleFromPoint(center, {
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x: -1.0 * Math.sqrt(2),
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y: -1.0 * Math.sqrt(2)
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})).toEqual({
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angle: Math.PI * 1.25,
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distance: 2
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});
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});
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it('should spline curves', function() {
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expect(helpers.splineCurve({
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x: 0,
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y: 0
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}, {
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x: 1,
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y: 1
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}, {
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x: 2,
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y: 0
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}, 0)).toEqual({
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previous: {
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x: 1,
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y: 1,
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},
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next: {
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x: 1,
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y: 1,
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}
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});
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expect(helpers.splineCurve({
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x: 0,
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y: 0
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}, {
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x: 1,
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y: 1
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}, {
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x: 2,
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y: 0
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}, 1)).toEqual({
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previous: {
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x: 0,
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y: 1,
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},
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next: {
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x: 2,
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y: 1,
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}
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});
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});
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it('should get the next or previous item in an array', function() {
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var testData = [0, 1, 2];
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expect(helpers.nextItem(testData, 0, false)).toEqual(1);
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expect(helpers.nextItem(testData, 2, false)).toEqual(2);
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expect(helpers.nextItem(testData, 2, true)).toEqual(0);
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expect(helpers.nextItem(testData, 1, true)).toEqual(2);
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expect(helpers.nextItem(testData, -1, false)).toEqual(0);
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expect(helpers.previousItem(testData, 0, false)).toEqual(0);
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expect(helpers.previousItem(testData, 0, true)).toEqual(2);
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expect(helpers.previousItem(testData, 2, false)).toEqual(1);
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expect(helpers.previousItem(testData, 1, true)).toEqual(0);
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});
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it('should clear a canvas', function() {
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var context = window.createMockContext();
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helpers.clear({
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width: 100,
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height: 150,
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ctx: context
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});
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expect(context.getCalls()).toEqual([{
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name: 'clearRect',
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args: [0, 0, 100, 150]
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}]);
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});
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it('should draw a rounded rectangle', function() {
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var context = window.createMockContext();
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helpers.drawRoundedRectangle(context, 10, 20, 30, 40, 5);
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expect(context.getCalls()).toEqual([{
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name: 'beginPath',
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args: []
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}, {
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name: 'moveTo',
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args: [15, 20]
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}, {
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name: 'lineTo',
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args: [35, 20]
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}, {
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name: 'quadraticCurveTo',
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args: [40, 20, 40, 25]
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}, {
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name: 'lineTo',
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args: [40, 55]
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}, {
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name: 'quadraticCurveTo',
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args: [40, 60, 35, 60]
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}, {
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name: 'lineTo',
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args: [15, 60]
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}, {
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name: 'quadraticCurveTo',
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args: [10, 60, 10, 55]
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}, {
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name: 'lineTo',
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args: [10, 25]
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}, {
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name: 'quadraticCurveTo',
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args: [10, 20, 15, 20]
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}, {
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name: 'closePath',
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args: []
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}])
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});
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it ('should get the maximum width and height for a node', function() {
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// Create div with fixed size as a test bed
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var div = document.createElement('div');
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div.style.width = "200px";
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div.style.height = "300px";
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document.body.appendChild(div);
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// Create the div we want to get the max size for
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var innerDiv = document.createElement('div');
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div.appendChild(innerDiv);
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expect(helpers.getMaximumWidth(innerDiv)).toBe(200);
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expect(helpers.getMaximumHeight(innerDiv)).toBe(300);
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document.body.removeChild(div);
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});
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it ('should get the maximum width of a node that has a max-width style', function() {
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// Create div with fixed size as a test bed
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var div = document.createElement('div');
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div.style.width = "200px";
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div.style.height = "300px";
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document.body.appendChild(div);
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// Create the div we want to get the max size for and set a max-width style
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var innerDiv = document.createElement('div');
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innerDiv.style.maxWidth = "150px";
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div.appendChild(innerDiv);
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expect(helpers.getMaximumWidth(innerDiv)).toBe(150);
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document.body.removeChild(div);
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});
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it ('should get the maximum height of a node that has a max-height style', function() {
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// Create div with fixed size as a test bed
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var div = document.createElement('div');
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div.style.width = "200px";
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div.style.height = "300px";
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document.body.appendChild(div);
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// Create the div we want to get the max size for and set a max-height style
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var innerDiv = document.createElement('div');
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innerDiv.style.maxHeight = "150px";
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div.appendChild(innerDiv);
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expect(helpers.getMaximumHeight(innerDiv)).toBe(150);
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document.body.removeChild(div);
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});
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it ('should get the maximum width of a node when the parent has a max-width style', function() {
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// Create div with fixed size as a test bed
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var div = document.createElement('div');
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div.style.width = "200px";
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div.style.height = "300px";
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document.body.appendChild(div);
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// Create an inner wrapper around our div we want to size and give that a max-width style
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var parentDiv = document.createElement('div');
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parentDiv.style.maxWidth = "150px";
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div.appendChild(parentDiv);
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// Create the div we want to get the max size for
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var innerDiv = document.createElement('div');
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parentDiv.appendChild(innerDiv);
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expect(helpers.getMaximumWidth(innerDiv)).toBe(150);
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document.body.removeChild(div);
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});
|
|
|
|
it ('should get the maximum height of a node when the parent has a max-height style', function() {
|
|
// Create div with fixed size as a test bed
|
|
var div = document.createElement('div');
|
|
div.style.width = "200px";
|
|
div.style.height = "300px";
|
|
|
|
document.body.appendChild(div);
|
|
|
|
// Create an inner wrapper around our div we want to size and give that a max-height style
|
|
var parentDiv = document.createElement('div');
|
|
parentDiv.style.maxHeight = "150px";
|
|
div.appendChild(parentDiv);
|
|
|
|
// Create the div we want to get the max size for
|
|
var innerDiv = document.createElement('div');
|
|
innerDiv.style.height = "300px"; // make it large
|
|
parentDiv.appendChild(innerDiv);
|
|
|
|
expect(helpers.getMaximumHeight(innerDiv)).toBe(150);
|
|
|
|
document.body.removeChild(div);
|
|
});
|
|
|
|
it ('should get the maximum width of a node that has a percentage max-width style', function() {
|
|
// Create div with fixed size as a test bed
|
|
var div = document.createElement('div');
|
|
div.style.width = "200px";
|
|
div.style.height = "300px";
|
|
|
|
document.body.appendChild(div);
|
|
|
|
// Create the div we want to get the max size for and set a max-width style
|
|
var innerDiv = document.createElement('div');
|
|
innerDiv.style.maxWidth = "50%";
|
|
div.appendChild(innerDiv);
|
|
|
|
expect(helpers.getMaximumWidth(innerDiv)).toBe(100);
|
|
|
|
document.body.removeChild(div);
|
|
});
|
|
|
|
it ('should get the maximum height of a node that has a percentage max-height style', function() {
|
|
// Create div with fixed size as a test bed
|
|
var div = document.createElement('div');
|
|
div.style.width = "200px";
|
|
div.style.height = "300px";
|
|
|
|
document.body.appendChild(div);
|
|
|
|
// Create the div we want to get the max size for and set a max-height style
|
|
var innerDiv = document.createElement('div');
|
|
innerDiv.style.maxHeight = "50%";
|
|
div.appendChild(innerDiv);
|
|
|
|
expect(helpers.getMaximumHeight(innerDiv)).toBe(150);
|
|
|
|
document.body.removeChild(div);
|
|
});
|
|
|
|
it ('should get the maximum width of a node when the parent has a percentage max-width style', function() {
|
|
// Create div with fixed size as a test bed
|
|
var div = document.createElement('div');
|
|
div.style.width = "200px";
|
|
div.style.height = "300px";
|
|
|
|
document.body.appendChild(div);
|
|
|
|
// Create an inner wrapper around our div we want to size and give that a max-width style
|
|
var parentDiv = document.createElement('div');
|
|
parentDiv.style.maxWidth = "50%";
|
|
div.appendChild(parentDiv);
|
|
|
|
// Create the div we want to get the max size for
|
|
var innerDiv = document.createElement('div');
|
|
parentDiv.appendChild(innerDiv);
|
|
|
|
expect(helpers.getMaximumWidth(innerDiv)).toBe(100);
|
|
|
|
document.body.removeChild(div);
|
|
});
|
|
|
|
it ('should get the maximum height of a node when the parent has a percentage max-height style', function() {
|
|
// Create div with fixed size as a test bed
|
|
var div = document.createElement('div');
|
|
div.style.width = "200px";
|
|
div.style.height = "300px";
|
|
|
|
document.body.appendChild(div);
|
|
|
|
// Create an inner wrapper around our div we want to size and give that a max-height style
|
|
var parentDiv = document.createElement('div');
|
|
parentDiv.style.maxHeight = "50%";
|
|
div.appendChild(parentDiv);
|
|
|
|
var innerDiv = document.createElement('div');
|
|
innerDiv.style.height = "300px"; // make it large
|
|
parentDiv.appendChild(innerDiv);
|
|
|
|
expect(helpers.getMaximumHeight(innerDiv)).toBe(150);
|
|
|
|
document.body.removeChild(div);
|
|
});
|
|
|
|
describe('Color helper', function() {
|
|
function isColorInstance(obj) {
|
|
return typeof obj === 'object' && obj.hasOwnProperty('values') && obj.values.hasOwnProperty('rgb');
|
|
}
|
|
|
|
it('should return a color when called with a color', function() {
|
|
expect(isColorInstance(helpers.color('rgb(1, 2, 3)'))).toBe(true);
|
|
});
|
|
|
|
it('should return a color when called with a CanvasGradient instance', function() {
|
|
var context = document.createElement('canvas').getContext('2d');
|
|
var gradient = context.createLinearGradient(0, 1, 2, 3);
|
|
|
|
expect(isColorInstance(helpers.color(gradient))).toBe(true);
|
|
});
|
|
});
|
|
|
|
});
|