function getLabels(scale) { return scale.ticks.map(t => t.label); } describe('Test tick generators', function() { // formatters are used as default config values so users want to be able to reference them it('Should expose formatters api', function() { expect(typeof Chart.Ticks).toBeDefined(); expect(typeof Chart.Ticks.formatters).toBeDefined(); expect(typeof Chart.Ticks.formatters.values).toBe('function'); expect(typeof Chart.Ticks.formatters.numeric).toBe('function'); }); it('Should generate linear spaced ticks with correct precision', function() { var chart = window.acquireChart({ type: 'line', data: { datasets: [{ data: [] }], }, options: { plugins: { legend: false }, scales: { x: { type: 'linear', position: 'bottom', ticks: { callback: function(value) { return value.toString(); } } }, y: { type: 'linear', ticks: { callback: function(value) { return value.toString(); } } } } } }); var xLabels = getLabels(chart.scales.x); var yLabels = getLabels(chart.scales.y); expect(xLabels).toEqual(['0', '0.1', '0.2', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']); expect(yLabels).toEqual(['0', '0.1', '0.2', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']); }); it('Should generate logarithmic spaced ticks with correct precision', function() { var chart = window.acquireChart({ type: 'line', data: { datasets: [{ data: [] }], }, options: { plugins: { legend: false }, scales: { x: { type: 'logarithmic', position: 'bottom', min: 0.1, max: 1, ticks: { callback: function(value) { return value.toString(); } } }, y: { type: 'logarithmic', min: 0.1, max: 1, ticks: { callback: function(value) { return value.toString(); } } } } } }); var xLabels = getLabels(chart.scales.x); var yLabels = getLabels(chart.scales.y); expect(xLabels).toEqual(['0.1', '0.2', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']); expect(yLabels).toEqual(['0.1', '0.2', '0.3', '0.4', '0.5', '0.6', '0.7', '0.8', '0.9', '1']); }); describe('formatters.numeric', function() { it('should not fail on empty or 1 item array', function() { const scale = {chart: {options: {locale: 'en'}}, options: {ticks: {format: {}}}}; expect(Chart.Ticks.formatters.numeric.apply(scale, [1, 0, []])).toEqual('1'); expect(Chart.Ticks.formatters.numeric.apply(scale, [1, 0, [{value: 1}]])).toEqual('1'); expect(Chart.Ticks.formatters.numeric.apply(scale, [1, 0, [{value: 1}, {value: 1.01}]])).toEqual('1.00'); }); }); });