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describe('Chart.controllers.line', function() {
describe('auto', jasmine.fixture.specs('controller.line'));
it('should be registered as dataset controller', function() {
expect(typeof Chart.controllers.line).toBe('function');
});
it('should be constructed', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: []
}],
labels: []
}
});
var meta = chart.getDatasetMeta(0);
expect(meta.type).toBe('line');
expect(meta.controller).not.toBe(undefined);
expect(meta.controller.index).toBe(0);
expect(meta.data).toEqual([]);
meta.controller.updateIndex(1);
expect(meta.controller.index).toBe(1);
});
it('Should use the first scale IDs if the dataset does not specify them', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: []
}],
labels: []
},
});
var meta = chart.getDatasetMeta(0);
expect(meta.xAxisID).toBe('x');
expect(meta.yAxisID).toBe('y');
});
it('Should not throw with empty dataset when tension is non-zero', function() {
// https://github.com/chartjs/Chart.js/issues/8676
function createChart() {
return window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [],
tension: 0.5
}],
labels: []
},
});
}
expect(createChart).not.toThrow();
});
it('should find min and max for stacked chart', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 11, 12, 13]
}, {
data: [1, 2, 3, 4]
}],
labels: ['a', 'b', 'c', 'd']
},
options: {
scales: {
y: {
stacked: true
}
}
}
});
expect(chart.getDatasetMeta(0).controller.getMinMax(chart.scales.y, true)).toEqual({min: 10, max: 13});
expect(chart.getDatasetMeta(1).controller.getMinMax(chart.scales.y, true)).toEqual({min: 11, max: 17});
chart.hide(0);
expect(chart.getDatasetMeta(0).controller.getMinMax(chart.scales.y, true)).toEqual({min: 10, max: 13});
expect(chart.getDatasetMeta(1).controller.getMinMax(chart.scales.y, true)).toEqual({min: 1, max: 4});
});
it('Should create line elements and point elements for each data item during initialization', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1'
}],
labels: ['label1', 'label2', 'label3', 'label4']
}
});
var meta = chart.getDatasetMeta(0);
expect(meta.data.length).toBe(4); // 4 points created
expect(meta.data[0] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[1] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[2] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[3] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.dataset instanceof Chart.elements.LineElement).toBe(true); // 1 line element
});
it('should draw all elements', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
showLine: true
}
});
var meta = chart.getDatasetMeta(0);
spyOn(meta.dataset, 'updateControlPoints');
spyOn(meta.dataset, 'draw');
spyOn(meta.data[0], 'draw');
spyOn(meta.data[1], 'draw');
spyOn(meta.data[2], 'draw');
spyOn(meta.data[3], 'draw');
chart.update();
expect(meta.dataset.updateControlPoints.calls.count()).toBeGreaterThanOrEqual(1);
expect(meta.dataset.draw.calls.count()).toBe(1);
expect(meta.data[0].draw.calls.count()).toBe(1);
expect(meta.data[1].draw.calls.count()).toBe(1);
expect(meta.data[2].draw.calls.count()).toBe(1);
expect(meta.data[3].draw.calls.count()).toBe(1);
});
it('should update elements when modifying data', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset',
xAxisID: 'x',
yAxisID: 'y'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
showLine: true,
plugins: {
legend: false,
title: false
},
elements: {
point: {
backgroundColor: 'red',
borderColor: 'blue',
}
},
scales: {
x: {
display: false
},
y: {
display: false
}
}
},
});
var meta = chart.getDatasetMeta(0);
expect(meta.data.length).toBe(4);
chart.data.datasets[0].data = [1, 2]; // remove 2 items
chart.data.datasets[0].borderWidth = 1;
chart.update();
expect(meta.data.length).toBe(2);
expect(meta._parsed.length).toBe(2);
[
{x: 5, y: 507},
{x: 171, y: 5}
].forEach(function(expected, i) {
expect(meta.data[i].x).toBeCloseToPixel(expected.x);
expect(meta.data[i].y).toBeCloseToPixel(expected.y);
expect(meta.data[i].options).toEqual(jasmine.objectContaining({
backgroundColor: 'red',
borderColor: 'blue',
}));
});
chart.data.datasets[0].data = [1, 2, 3]; // add 1 items
chart.update();
expect(meta.data.length).toBe(3); // should add a new meta data item
});
it('should correctly calculate x scale for label and point', function() {
var chart = window.acquireChart({
type: 'line',
data: {
labels: ['One'],
datasets: [{
data: [1],
}]
},
options: {
plugins: {
legend: false,
title: false
},
hover: {
mode: 'nearest',
intersect: true
},
scales: {
x: {
display: false,
},
y: {
display: false,
beginAtZero: true
}
}
}
});
var meta = chart.getDatasetMeta(0);
// 1 point
var point = meta.data[0];
expect(point.x).toBeCloseToPixel(5);
// 2 points
chart.data.labels = ['One', 'Two'];
chart.data.datasets[0].data = [1, 2];
chart.update();
var points = meta.data;
expect(points[0].x).toBeCloseToPixel(5);
expect(points[1].x).toBeCloseToPixel(507);
// 3 points
chart.data.labels = ['One', 'Two', 'Three'];
chart.data.datasets[0].data = [1, 2, 3];
chart.update();
points = meta.data;
expect(points[0].x).toBeCloseToPixel(5);
expect(points[1].x).toBeCloseToPixel(256);
expect(points[2].x).toBeCloseToPixel(507);
// 4 points
chart.data.labels = ['One', 'Two', 'Three', 'Four'];
chart.data.datasets[0].data = [1, 2, 3, 4];
chart.update();
points = meta.data;
expect(points[0].x).toBeCloseToPixel(5);
expect(points[1].x).toBeCloseToPixel(171);
expect(points[2].x).toBeCloseToPixel(340);
expect(points[3].x).toBeCloseToPixel(507);
});
it('should update elements when the y scale is stacked', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, -10, 10, -10],
label: 'dataset1'
}, {
data: [10, 15, 0, -4],
label: 'dataset2'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
plugins: {
legend: false,
title: false
},
scales: {
x: {
display: false,
},
y: {
display: false,
stacked: true
}
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 5, y: 148},
{x: 171, y: 435},
{x: 341, y: 148},
{x: 507, y: 435}
].forEach(function(values, i) {
expect(meta0.data[i].x).toBeCloseToPixel(values.x);
expect(meta0.data[i].y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 5, y: 5},
{x: 171, y: 76},
{x: 341, y: 148},
{x: 507, y: 492}
].forEach(function(values, i) {
expect(meta1.data[i].x).toBeCloseToPixel(values.x);
expect(meta1.data[i].y).toBeCloseToPixel(values.y);
});
});
it('should update elements when the y scale is stacked with multiple axes', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, -10, 10, -10],
label: 'dataset1'
}, {
data: [10, 15, 0, -4],
label: 'dataset2'
}, {
data: [10, 10, -10, -10],
label: 'dataset3',
yAxisID: 'y2'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
plugins: {
legend: false,
title: false,
},
scales: {
x: {
display: false,
},
y: {
display: false,
stacked: true
},
y2: {
type: 'linear',
position: 'right',
display: false
}
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 5, y: 148},
{x: 171, y: 435},
{x: 341, y: 148},
{x: 507, y: 435}
].forEach(function(values, i) {
expect(meta0.data[i].x).toBeCloseToPixel(values.x);
expect(meta0.data[i].y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 5, y: 5},
{x: 171, y: 76},
{x: 341, y: 148},
{x: 507, y: 492}
].forEach(function(values, i) {
expect(meta1.data[i].x).toBeCloseToPixel(values.x);
expect(meta1.data[i].y).toBeCloseToPixel(values.y);
});
});
it('should update elements when the y scale is stacked and datasets is scatter data', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [{
x: 0,
y: 10
}, {
x: 1,
y: -10
}, {
x: 2,
y: 10
}, {
x: 3,
y: -10
}],
label: 'dataset1'
}, {
data: [{
x: 0,
y: 10
}, {
x: 1,
y: 15
}, {
x: 2,
y: 0
}, {
x: 3,
y: -4
}],
label: 'dataset2'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
plugins: {
legend: false,
title: false
},
scales: {
x: {
display: false,
},
y: {
display: false,
stacked: true
}
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 5, y: 148},
{x: 171, y: 435},
{x: 341, y: 148},
{x: 507, y: 435}
].forEach(function(values, i) {
expect(meta0.data[i].x).toBeCloseToPixel(values.x);
expect(meta0.data[i].y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 5, y: 5},
{x: 171, y: 76},
{x: 341, y: 148},
{x: 507, y: 492}
].forEach(function(values, i) {
expect(meta1.data[i].x).toBeCloseToPixel(values.x);
expect(meta1.data[i].y).toBeCloseToPixel(values.y);
});
});
it('should update elements when the y scale is stacked and data is strings', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: ['10', '-10', '10', '-10'],
label: 'dataset1'
}, {
data: ['10', '15', '0', '-4'],
label: 'dataset2'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
plugins: {
legend: false,
title: false
},
scales: {
x: {
display: false,
},
y: {
display: false,
stacked: true
}
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 5, y: 148},
{x: 171, y: 435},
{x: 341, y: 148},
{x: 507, y: 435}
].forEach(function(values, i) {
expect(meta0.data[i].x).toBeCloseToPixel(values.x);
expect(meta0.data[i].y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 5, y: 5},
{x: 171, y: 76},
{x: 341, y: 148},
{x: 507, y: 492}
].forEach(function(values, i) {
expect(meta1.data[i].x).toBeCloseToPixel(values.x);
expect(meta1.data[i].y).toBeCloseToPixel(values.y);
});
});
it('should fall back to the line styles for points', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [0, 0],
label: 'dataset1',
// line styles
backgroundColor: 'rgb(98, 98, 98)',
borderColor: 'rgb(8, 8, 8)',
borderWidth: 0.55,
}],
labels: ['label1', 'label2']
}
});
var meta = chart.getDatasetMeta(0);
expect(meta.dataset.options.backgroundColor).toBe('rgb(98, 98, 98)');
expect(meta.dataset.options.borderColor).toBe('rgb(8, 8, 8)');
expect(meta.dataset.options.borderWidth).toBe(0.55);
});
describe('dataset global defaults', function() {
beforeEach(function() {
this._defaults = Chart.helpers.clone(Chart.defaults.datasets.line);
});
afterEach(function() {
Chart.defaults.datasets.line = this._defaults;
delete this._defaults;
});
it('should utilize the dataset global default options', function() {
Chart.helpers.merge(Chart.defaults.datasets.line, {
spanGaps: true,
tension: 0.231,
backgroundColor: '#add',
borderWidth: '#daa',
borderColor: '#dad',
borderCapStyle: 'round',
borderDash: [0],
borderDashOffset: 0.871,
borderJoinStyle: 'miter',
fill: 'start',
cubicInterpolationMode: 'monotone'
});
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [0, 0],
label: 'dataset1'
}],
labels: ['label1', 'label2']
}
});
var options = chart.getDatasetMeta(0).dataset.options;
expect(options.spanGaps).toBe(true);
expect(options.tension).toBe(0.231);
expect(options.backgroundColor).toBe('#add');
expect(options.borderWidth).toBe('#daa');
expect(options.borderColor).toBe('#dad');
expect(options.borderCapStyle).toBe('round');
expect(options.borderDash).toEqual([0]);
expect(options.borderDashOffset).toBe(0.871);
expect(options.borderJoinStyle).toBe('miter');
expect(options.fill).toBe('start');
expect(options.cubicInterpolationMode).toBe('monotone');
});
it('should be overridden by user-supplied values', function() {
Chart.helpers.merge(Chart.defaults.datasets.line, {
spanGaps: true,
tension: 0.231
});
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [0, 0],
label: 'dataset1',
spanGaps: true,
backgroundColor: '#dad'
}],
labels: ['label1', 'label2']
},
options: {
datasets: {
line: {
tension: 0.345,
backgroundColor: '#add'
}
}
}
});
var options = chart.getDatasetMeta(0).dataset.options;
// dataset-level option overrides global default
expect(options.spanGaps).toBe(true);
// chart-level default overrides global default
expect(options.tension).toBe(0.345);
// dataset-level option overrides chart-level default
expect(options.backgroundColor).toBe('#dad');
});
});
it('should obey the chart-level dataset options', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [0, 0],
label: 'dataset1'
}],
labels: ['label1', 'label2']
},
options: {
datasets: {
line: {
spanGaps: true,
tension: 0.231,
backgroundColor: '#add',
borderWidth: '#daa',
borderColor: '#dad',
borderCapStyle: 'round',
borderDash: [0],
borderDashOffset: 0.871,
borderJoinStyle: 'miter',
fill: 'start',
cubicInterpolationMode: 'monotone'
}
}
}
});
var options = chart.getDatasetMeta(0).dataset.options;
expect(options.spanGaps).toBe(true);
expect(options.tension).toBe(0.231);
expect(options.backgroundColor).toBe('#add');
expect(options.borderWidth).toBe('#daa');
expect(options.borderColor).toBe('#dad');
expect(options.borderCapStyle).toBe('round');
expect(options.borderDash).toEqual([0]);
expect(options.borderDashOffset).toBe(0.871);
expect(options.borderJoinStyle).toBe('miter');
expect(options.fill).toBe('start');
expect(options.cubicInterpolationMode).toBe('monotone');
});
it('should obey the dataset options', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [0, 0],
label: 'dataset1',
spanGaps: true,
tension: 0.231,
backgroundColor: '#add',
borderWidth: '#daa',
borderColor: '#dad',
borderCapStyle: 'round',
borderDash: [0],
borderDashOffset: 0.871,
borderJoinStyle: 'miter',
fill: 'start',
cubicInterpolationMode: 'monotone'
}],
labels: ['label1', 'label2']
}
});
var options = chart.getDatasetMeta(0).dataset.options;
expect(options.spanGaps).toBe(true);
expect(options.tension).toBe(0.231);
expect(options.backgroundColor).toBe('#add');
expect(options.borderWidth).toBe('#daa');
expect(options.borderColor).toBe('#dad');
expect(options.borderCapStyle).toBe('round');
expect(options.borderDash).toEqual([0]);
expect(options.borderDashOffset).toBe(0.871);
expect(options.borderJoinStyle).toBe('miter');
expect(options.fill).toBe('start');
expect(options.cubicInterpolationMode).toBe('monotone');
});
it('should handle number of data point changes in update', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1',
}],
labels: ['label1', 'label2', 'label3', 'label4']
}
});
var meta = chart.getDatasetMeta(0);
chart.data.datasets[0].data = [1, 2]; // remove 2 items
chart.update();
expect(meta.data.length).toBe(2);
expect(meta.data[0] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[1] instanceof Chart.elements.PointElement).toBe(true);
chart.data.datasets[0].data = [1, 2, 3, 4, 5]; // add 3 items
chart.update();
expect(meta.data.length).toBe(5);
expect(meta.data[0] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[1] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[2] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[3] instanceof Chart.elements.PointElement).toBe(true);
expect(meta.data[4] instanceof Chart.elements.PointElement).toBe(true);
});
describe('Interactions', function() {
beforeEach(function() {
this.chart = window.acquireChart({
type: 'line',
data: {
labels: ['label1', 'label2', 'label3', 'label4'],
datasets: [{
data: [10, 15, 0, -4]
}]
},
options: {
scales: {
x: {
offset: true
}
},
elements: {
point: {
backgroundColor: 'rgb(100, 150, 200)',
borderColor: 'rgb(50, 100, 150)',
borderWidth: 2,
radius: 3
}
}
}
});
});
it ('should handle default hover styles', async function() {
var chart = this.chart;
var point = chart.getDatasetMeta(0).data[0];
await jasmine.triggerMouseEvent(chart, 'mousemove', point);
expect(point.options.backgroundColor).toBe('#3187DD');
expect(point.options.borderColor).toBe('#175A9D');
expect(point.options.borderWidth).toBe(1);
expect(point.options.radius).toBe(4);
await jasmine.triggerMouseEvent(chart, 'mouseout', point);
expect(point.options.backgroundColor).toBe('rgb(100, 150, 200)');
expect(point.options.borderColor).toBe('rgb(50, 100, 150)');
expect(point.options.borderWidth).toBe(2);
expect(point.options.radius).toBe(3);
});
it ('should handle hover styles defined via dataset properties', async function() {
var chart = this.chart;
var point = chart.getDatasetMeta(0).data[0];
Chart.helpers.merge(chart.data.datasets[0], {
hoverBackgroundColor: 'rgb(200, 100, 150)',
hoverBorderColor: 'rgb(150, 50, 100)',
hoverBorderWidth: 8.4,
hoverRadius: 4.2
});
chart.update();
await jasmine.triggerMouseEvent(chart, 'mousemove', point);
expect(point.options.backgroundColor).toBe('rgb(200, 100, 150)');
expect(point.options.borderColor).toBe('rgb(150, 50, 100)');
expect(point.options.borderWidth).toBe(8.4);
expect(point.options.radius).toBe(4.2);
await jasmine.triggerMouseEvent(chart, 'mouseout', point);
expect(point.options.backgroundColor).toBe('rgb(100, 150, 200)');
expect(point.options.borderColor).toBe('rgb(50, 100, 150)');
expect(point.options.borderWidth).toBe(2);
expect(point.options.radius).toBe(3);
});
it('should handle hover styles defined via element options', async function() {
var chart = this.chart;
var point = chart.getDatasetMeta(0).data[0];
Chart.helpers.merge(chart.options.elements.point, {
hoverBackgroundColor: 'rgb(200, 100, 150)',
hoverBorderColor: 'rgb(150, 50, 100)',
hoverBorderWidth: 8.4,
hoverRadius: 4.2
});
chart.update();
await jasmine.triggerMouseEvent(chart, 'mousemove', point);
expect(point.options.backgroundColor).toBe('rgb(200, 100, 150)');
expect(point.options.borderColor).toBe('rgb(150, 50, 100)');
expect(point.options.borderWidth).toBe(8.4);
expect(point.options.radius).toBe(4.2);
await jasmine.triggerMouseEvent(chart, 'mouseout', point);
expect(point.options.backgroundColor).toBe('rgb(100, 150, 200)');
expect(point.options.borderColor).toBe('rgb(50, 100, 150)');
expect(point.options.borderWidth).toBe(2);
expect(point.options.radius).toBe(3);
});
it('should handle dataset hover styles defined via dataset properties', async function() {
var chart = this.chart;
var point = chart.getDatasetMeta(0).data[0];
var dataset = chart.getDatasetMeta(0).dataset;
Chart.helpers.merge(chart.data.datasets[0], {
backgroundColor: '#AAA',
borderColor: '#BBB',
borderWidth: 6,
hoverBackgroundColor: '#000',
hoverBorderColor: '#111',
hoverBorderWidth: 12
});
chart.options.hover = {mode: 'dataset'};
chart.update();
await jasmine.triggerMouseEvent(chart, 'mousemove', point);
expect(dataset.options.backgroundColor).toBe('#000');
expect(dataset.options.borderColor).toBe('#111');
expect(dataset.options.borderWidth).toBe(12);
await jasmine.triggerMouseEvent(chart, 'mouseout', point);
expect(dataset.options.backgroundColor).toBe('#AAA');
expect(dataset.options.borderColor).toBe('#BBB');
expect(dataset.options.borderWidth).toBe(6);
});
});
it('should allow 0 as a point border width', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1',
pointBorderWidth: 0
}],
labels: ['label1', 'label2', 'label3', 'label4']
}
});
var meta = chart.getDatasetMeta(0);
var point = meta.data[0];
expect(point.options.borderWidth).toBe(0);
});
it('should allow an array as the point border width setting', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1',
pointBorderWidth: [1, 2, 3, 4]
}],
labels: ['label1', 'label2', 'label3', 'label4']
}
});
var meta = chart.getDatasetMeta(0);
expect(meta.data[0].options.borderWidth).toBe(1);
expect(meta.data[1].options.borderWidth).toBe(2);
expect(meta.data[2].options.borderWidth).toBe(3);
expect(meta.data[3].options.borderWidth).toBe(4);
});
it('should render a million points', function() {
var data = [];
for (let x = 0; x < 1e6; x++) {
data.push({x, y: Math.sin(x / 10000)});
}
function createChart() {
window.acquireChart({
type: 'line',
data: {
datasets: [{
data,
borderWidth: 1,
radius: 0
}],
},
options: {
scales: {
x: {type: 'linear'},
y: {type: 'linear'}
}
}
});
}
expect(createChart).not.toThrow();
});
it('should set skipped points to the reset state', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, null, 0, -4],
label: 'dataset1',
pointBorderWidth: [1, 2, 3, 4]
}],
labels: ['label1', 'label2', 'label3', 'label4']
}
});
var meta = chart.getDatasetMeta(0);
var point = meta.data[1];
var {x, y} = point.getProps(['x', 'y'], true);
expect(point.skip).toBe(true);
expect(isNaN(x)).toBe(false);
expect(isNaN(y)).toBe(false);
});
it('should honor spangap interval forwards', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
spanGaps: 10,
data: [{x: 10, y: 123}, {x: 15, y: 124}, {x: 26, y: 125}, {x: 30, y: 126}, {x: 35, y: 127}],
label: 'dataset1',
}],
},
options: {
scales: {
x: {
type: 'linear',
}
}
}
});
var meta = chart.getDatasetMeta(0);
for (var i = 0; i < meta.data.length; ++i) {
var point = meta.data[i];
expect(point.stop).toBe(i === 2);
}
});
it('should honor spangap interval backwards', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
spanGaps: 10,
data: [{x: 35, y: 123}, {x: 30, y: 124}, {x: 26, y: 125}, {x: 15, y: 126}, {x: 10, y: 127}],
label: 'dataset1',
}],
},
options: {
scales: {
x: {
type: 'linear',
}
}
}
});
var meta = chart.getDatasetMeta(0);
for (var i = 0; i < meta.data.length; ++i) {
var point = meta.data[i];
expect(point.stop).toBe(i === 3);
}
});
it('should correctly calc visible points on update', async() => {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [
{x: 10, y: 20},
{x: 15, y: 19},
]
}],
},
options: {
scales: {
y: {
type: 'linear',
min: 0,
max: 25,
},
x: {
type: 'linear',
min: 0,
max: 50
},
}
}
});
chart.data.datasets[0].data = [
{x: 10, y: 20},
{x: 15, y: 19},
{x: 17, y: 12},
{x: 50, y: 9},
{x: 50, y: 9},
{x: 50, y: 9},
{x: 51, y: 9},
{x: 52, y: 9},
{x: 52, y: 9},
];
chart.update();
var point = chart.getDatasetMeta(0).data[0];
var event = {
type: 'mousemove',
native: true,
...point
};
chart._handleEvent(event, false, true);
const visiblePoints = chart.getSortedVisibleDatasetMetas()[0].data.filter(_ => !_.skip);
expect(visiblePoints.length).toBe(6);
}, 500);
it('should not override tooltip title and label callbacks', async() => {
const chart = window.acquireChart({
type: 'line',
data: {
labels: ['Label 1', 'Label 2'],
datasets: [{
data: [21, 79],
label: 'Dataset 1'
}, {
data: [33, 67],
label: 'Dataset 2'
}]
},
options: {
responsive: true,
maintainAspectRatio: true,
}
});
const {tooltip} = chart;
const point = chart.getDatasetMeta(0).data[0];
await jasmine.triggerMouseEvent(chart, 'mousemove', point);
expect(tooltip.title).toEqual(['Label 1']);
expect(tooltip.body).toEqual([{
before: [],
lines: ['Dataset 1: 21'],
after: []
}]);
chart.options.plugins.tooltip = {mode: 'dataset'};
chart.update();
await jasmine.triggerMouseEvent(chart, 'mousemove', point);
expect(tooltip.title).toEqual(['Dataset 1']);
expect(tooltip.body).toEqual([{
before: [],
lines: ['Label 1: 21'],
after: []
}, {
before: [],
lines: ['Label 2: 79'],
after: []
}]);
});
});
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