mirror of
https://github.com/chartjs/Chart.js.git
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3b76488373
* Refine logarithmic scaling / tick generation * Disable autoSkip on reverese test * Reduce ticks, fix min
111 lines
3.3 KiB
JavaScript
111 lines
3.3 KiB
JavaScript
function getLabels(scale) {
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return scale.ticks.map(t => t.label);
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}
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describe('Test tick generators', function() {
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// formatters are used as default config values so users want to be able to reference them
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it('Should expose formatters api', function() {
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expect(typeof Chart.Ticks).toBeDefined();
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expect(typeof Chart.Ticks.formatters).toBeDefined();
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expect(typeof Chart.Ticks.formatters.values).toBe('function');
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expect(typeof Chart.Ticks.formatters.numeric).toBe('function');
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});
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it('Should generate linear spaced ticks with correct precision', 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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data: []
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}],
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},
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options: {
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plugins: {
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legend: false
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},
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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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ticks: {
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callback: function(value) {
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return value.toString();
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}
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}
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},
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y: {
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type: 'linear',
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ticks: {
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callback: function(value) {
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return value.toString();
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}
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}
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}
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}
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}
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});
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var xLabels = getLabels(chart.scales.x);
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var yLabels = getLabels(chart.scales.y);
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expect(xLabels).toEqual(['0', '0.1', '0.2', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']);
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expect(yLabels).toEqual(['0', '0.1', '0.2', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']);
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});
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it('Should generate logarithmic spaced ticks with correct precision', 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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data: []
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}],
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},
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options: {
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plugins: {
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legend: false
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},
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scales: {
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x: {
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type: 'logarithmic',
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position: 'bottom',
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min: 0.1,
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max: 1,
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ticks: {
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autoSkip: false,
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callback: function(value) {
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return value.toString();
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}
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}
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},
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y: {
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type: 'logarithmic',
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min: 0.1,
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max: 1,
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ticks: {
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autoSkip: false,
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callback: function(value) {
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return value.toString();
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}
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}
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}
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}
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}
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});
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var xLabels = getLabels(chart.scales.x);
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var yLabels = getLabels(chart.scales.y);
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expect(xLabels).toEqual(['0.1', '0.11', '0.12', '0.13', '0.14', '0.15', '0.16', '0.17', '0.18', '0.19', '0.2', '0.25', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']);
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expect(yLabels).toEqual(['0.1', '0.11', '0.12', '0.13', '0.14', '0.15', '0.16', '0.17', '0.18', '0.19', '0.2', '0.25', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']);
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});
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describe('formatters.numeric', function() {
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it('should not fail on empty or 1 item array', function() {
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const scale = {chart: {options: {locale: 'en'}}, options: {ticks: {format: {}}}};
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expect(Chart.Ticks.formatters.numeric.apply(scale, [1, 0, []])).toEqual('1');
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expect(Chart.Ticks.formatters.numeric.apply(scale, [1, 0, [{value: 1}]])).toEqual('1');
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expect(Chart.Ticks.formatters.numeric.apply(scale, [1, 0, [{value: 1}, {value: 1.01}]])).toEqual('1.00');
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});
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});
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});
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