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https://github.com/chartjs/Chart.js.git
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503 lines
11 KiB
JavaScript
503 lines
11 KiB
JavaScript
// Test the category scale
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function getLabels(scale) {
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return scale.ticks.map(t => t.label);
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}
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function getValues(scale) {
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return scale.ticks.map(t => t.value);
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}
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describe('Category scale tests', function() {
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describe('auto', jasmine.fixture.specs('scale.category'));
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it('Should register the constructor with the scale service', function() {
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var Constructor = Chart.scaleService.getScaleConstructor('category');
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expect(Constructor).not.toBe(undefined);
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expect(typeof Constructor).toBe('function');
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});
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it('Should have the correct default config', function() {
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var defaultConfig = Chart.scaleService.getScaleDefaults('category');
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expect(defaultConfig).toEqual({
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display: true,
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reverse: false,
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beginAtZero: false,
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gridLines: {
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color: 'rgba(0,0,0,0.1)',
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drawBorder: true,
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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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borderDash: [],
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borderDashOffset: 0.0
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},
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offset: false,
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scaleLabel: Chart.defaults.scale.scaleLabel,
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ticks: {
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minRotation: 0,
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maxRotation: 50,
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mirror: false,
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padding: 0,
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display: true,
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callback: defaultConfig.ticks.callback, // make this nicer, then check explicitly below
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autoSkip: true,
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autoSkipPadding: 0,
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labelOffset: 0,
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minor: {},
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major: {},
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lineWidth: 0,
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strokeStyle: '',
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}
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});
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// Is this actually a function
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expect(defaultConfig.ticks.callback).toEqual(jasmine.any(Function));
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});
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it('Should generate ticks from the data xLabels', function() {
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var scaleID = 'myScale';
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var mockData = {
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datasets: [{
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yAxisID: scaleID,
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data: [10, 5, 0, 25, 78]
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}],
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xLabels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5']
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};
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var config = Chart.helpers.clone(Chart.scaleService.getScaleDefaults('category'));
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config.position = 'bottom';
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var Constructor = Chart.scaleService.getScaleConstructor('category');
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var scale = new Constructor({
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ctx: {},
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chart: {
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data: mockData
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},
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id: scaleID
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});
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scale.init(config);
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scale.determineDataLimits();
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scale.ticks = scale.buildTicks();
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expect(getValues(scale)).toEqual(mockData.xLabels);
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});
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it('Should generate ticks from the data yLabels', function() {
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var scaleID = 'myScale';
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var mockData = {
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datasets: [{
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yAxisID: scaleID,
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data: [10, 5, 0, 25, 78]
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}],
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yLabels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5']
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};
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var config = Chart.helpers.clone(Chart.scaleService.getScaleDefaults('category'));
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config.position = 'left'; // y axis
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var Constructor = Chart.scaleService.getScaleConstructor('category');
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var scale = new Constructor({
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ctx: {},
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chart: {
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data: mockData
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},
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id: scaleID
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});
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scale.init(config);
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scale.determineDataLimits();
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scale.ticks = scale.buildTicks();
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expect(getValues(scale)).toEqual(mockData.yLabels);
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});
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it('Should generate ticks from the axis labels', function() {
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var labels = ['tick1', 'tick2', 'tick3', 'tick4', 'tick5'];
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var chart = window.acquireChart({
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type: 'line',
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data: {
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data: [10, 5, 0, 25, 78]
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},
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options: {
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scales: {
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x: {
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type: 'category',
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labels: labels
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}
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}
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}
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});
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var scale = chart.scales.x;
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expect(getLabels(scale)).toEqual(labels);
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});
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it('should get the correct label for the index', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [10, 5, 0, 25, 78]
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}],
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labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5']
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom'
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},
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y: {
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type: 'linear'
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}
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}
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}
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});
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var scale = chart.scales.x;
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expect(scale.getLabelForValue(1)).toBe('tick2');
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});
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it('Should get the correct pixel for a value when horizontal', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [10, 5, 0, 25, 78]
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}],
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labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick_last']
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom'
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},
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y: {
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type: 'linear'
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}
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}
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}
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});
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var xScale = chart.scales.x;
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expect(xScale.getPixelForValue(0)).toBeCloseToPixel(23 + 6); // plus lineHeight
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expect(xScale.getValueForPixel(23)).toBe(0);
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expect(xScale.getPixelForValue(4)).toBeCloseToPixel(487);
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expect(xScale.getValueForPixel(487)).toBe(4);
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xScale.options.offset = true;
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chart.update();
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expect(xScale.getPixelForValue(0)).toBeCloseToPixel(71 + 6); // plus lineHeight
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expect(xScale.getValueForPixel(69)).toBe(0);
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expect(xScale.getPixelForValue(4)).toBeCloseToPixel(461);
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expect(xScale.getValueForPixel(417)).toBe(4);
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});
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it('Should get the correct pixel for a value when there are repeated labels', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [10, 5, 0, 25, 78]
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}],
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labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick_last']
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom'
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},
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y: {
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type: 'linear'
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}
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}
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}
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});
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var xScale = chart.scales.x;
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expect(xScale.getPixelForValue('tick1')).toBeCloseToPixel(23 + 6); // plus lineHeight
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});
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it('Should get the correct pixel for a value when horizontal and zoomed', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [10, 5, 0, 25, 78]
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}],
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labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick_last']
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom',
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min: 'tick2',
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max: 'tick4'
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},
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y: {
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type: 'linear'
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}
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}
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}
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});
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var xScale = chart.scales.x;
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expect(xScale.getPixelForValue(1)).toBeCloseToPixel(23 + 6); // plus lineHeight
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expect(xScale.getPixelForValue(3)).toBeCloseToPixel(496);
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xScale.options.offset = true;
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chart.update();
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expect(xScale.getPixelForValue(1)).toBeCloseToPixel(103 + 6); // plus lineHeight
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expect(xScale.getPixelForValue(3)).toBeCloseToPixel(429);
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});
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it('should get the correct pixel for a value when vertical', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: ['3', '5', '1', '4', '2']
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}],
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labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5'],
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yLabels: ['1', '2', '3', '4', '5']
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom',
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},
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y: {
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type: 'category',
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position: 'left'
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}
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}
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}
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});
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var yScale = chart.scales.y;
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expect(yScale.getPixelForValue(0)).toBeCloseToPixel(32);
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expect(yScale.getValueForPixel(257)).toBe(2);
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expect(yScale.getPixelForValue(4)).toBeCloseToPixel(481);
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expect(yScale.getValueForPixel(144)).toBe(1);
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yScale.options.offset = true;
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chart.update();
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expect(yScale.getPixelForValue(0)).toBeCloseToPixel(77);
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expect(yScale.getValueForPixel(256)).toBe(2);
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expect(yScale.getPixelForValue(4)).toBeCloseToPixel(436);
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expect(yScale.getValueForPixel(167)).toBe(1);
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});
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it('should get the correct pixel for a value when vertical and zoomed', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: ['3', '5', '1', '4', '2']
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}],
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labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5'],
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yLabels: ['1', '2', '3', '4', '5']
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom',
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},
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y: {
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type: 'category',
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position: 'left',
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min: '2',
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max: '4'
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}
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}
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}
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});
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var yScale = chart.scales.y;
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expect(yScale.getPixelForValue(1)).toBeCloseToPixel(32);
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expect(yScale.getPixelForValue(3)).toBeCloseToPixel(482);
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yScale.options.offset = true;
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chart.update();
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expect(yScale.getPixelForValue(1)).toBeCloseToPixel(107);
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expect(yScale.getPixelForValue(3)).toBeCloseToPixel(407);
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});
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it('Should get the correct pixel for an object value when horizontal', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [
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{x: 0, y: 10},
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{x: 1, y: 5},
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{x: 2, y: 0},
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{x: 3, y: 25},
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{x: 0, y: 78}
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]
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}],
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labels: [0, 1, 2, 3]
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom'
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},
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y: {
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type: 'linear'
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}
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}
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}
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});
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var xScale = chart.scales.x;
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expect(xScale.getPixelForValue(0)).toBeCloseToPixel(29);
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expect(xScale.getPixelForValue(3)).toBeCloseToPixel(506);
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expect(xScale.getPixelForValue(4)).toBeCloseToPixel(664);
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});
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it('Should get the correct pixel for an object value when vertical', function() {
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var chart = window.acquireChart({
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type: 'line',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [
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{x: 0, y: 2},
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{x: 1, y: 4},
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{x: 2, y: 0},
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{x: 3, y: 3},
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{x: 0, y: 1}
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]
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}],
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labels: [0, 1, 2, 3],
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yLabels: [0, 1, 2, 3, 4]
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom'
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},
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y: {
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type: 'category',
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position: 'left'
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}
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}
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}
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});
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var yScale = chart.scales.y;
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expect(yScale.getPixelForValue(0)).toBeCloseToPixel(32);
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expect(yScale.getPixelForValue(4)).toBeCloseToPixel(481);
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});
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it('Should get the correct pixel for an object value in a bar chart', function() {
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var chart = window.acquireChart({
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type: 'bar',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [
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{x: 0, y: 10},
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{x: 1, y: 5},
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{x: 2, y: 0},
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{x: 3, y: 25},
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{x: 0, y: 78}
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]
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}],
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labels: [0, 1, 2, 3]
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},
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options: {
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scales: {
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x: {
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type: 'category',
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position: 'bottom'
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},
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y: {
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type: 'linear'
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}
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}
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}
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});
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var xScale = chart.scales.x;
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expect(xScale.getPixelForValue(0)).toBeCloseToPixel(89);
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expect(xScale.getPixelForValue(3)).toBeCloseToPixel(449);
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expect(xScale.getPixelForValue(4)).toBeCloseToPixel(569);
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});
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it('Should get the correct pixel for an object value in a horizontal bar chart', function() {
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var chart = window.acquireChart({
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type: 'horizontalBar',
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data: {
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datasets: [{
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xAxisID: 'x',
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yAxisID: 'y',
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data: [
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{x: 10, y: 0},
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{x: 5, y: 1},
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{x: 0, y: 2},
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{x: 25, y: 3},
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{x: 78, y: 0}
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]
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}],
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labels: [0, 1, 2, 3]
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},
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options: {
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scales: {
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x: {
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type: 'linear',
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position: 'bottom'
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},
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y: {
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type: 'category'
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}
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}
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}
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});
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var yScale = chart.scales.y;
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expect(yScale.getPixelForValue(0)).toBeCloseToPixel(88);
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expect(yScale.getPixelForValue(3)).toBeCloseToPixel(426);
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expect(yScale.getPixelForValue(4)).toBeCloseToPixel(538);
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});
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});
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