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| Viewing file: Select action/file-type: describe('Chart.controllers.line', 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: []
},
options: {
scales: {
xAxes: [{
id: 'firstXScaleID'
}],
yAxes: [{
id: 'firstYScaleID'
}]
}
}
});
var meta = chart.getDatasetMeta(0);
expect(meta.xAxisID).toBe('firstXScaleID');
expect(meta.yAxisID).toBe('firstYScaleID');
});
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.Point).toBe(true);
expect(meta.data[1] instanceof Chart.elements.Point).toBe(true);
expect(meta.data[2] instanceof Chart.elements.Point).toBe(true);
expect(meta.data[3] instanceof Chart.elements.Point).toBe(true);
expect(meta.dataset instanceof Chart.elements.Line).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: {
showLines: true
}
});
var meta = chart.getDatasetMeta(0);
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.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 draw all elements except lines', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
showLines: false
}
});
var meta = chart.getDatasetMeta(0);
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.draw.calls.count()).toBe(0);
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 draw all elements except lines turned off per dataset', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1',
showLine: false
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
showLines: true
}
});
var meta = chart.getDatasetMeta(0);
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.draw.calls.count()).toBe(0);
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: 'firstXScaleID',
yAxisID: 'firstYScaleID'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
showLines: true,
legend: false,
title: false,
elements: {
point: {
backgroundColor: 'red',
borderColor: 'blue',
}
},
scales: {
xAxes: [{
id: 'firstXScaleID',
display: false
}],
yAxes: [{
id: 'firstYScaleID',
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);
[
{x: 0, y: 512},
{x: 171, y: 0}
].forEach(function(expected, i) {
expect(meta.data[i]._datasetIndex).toBe(0);
expect(meta.data[i]._index).toBe(i);
expect(meta.data[i]._xScale).toBe(chart.scales.firstXScaleID);
expect(meta.data[i]._yScale).toBe(chart.scales.firstYScaleID);
expect(meta.data[i]._model.x).toBeCloseToPixel(expected.x);
expect(meta.data[i]._model.y).toBeCloseToPixel(expected.y);
expect(meta.data[i]._model).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: {
legend: false,
title: false,
hover: {
mode: 'single'
},
scales: {
xAxes: [{
display: false,
}],
yAxes: [{
display: false,
ticks: {
beginAtZero: true
}
}]
}
}
});
var meta = chart.getDatasetMeta(0);
// 1 point
var point = meta.data[0];
expect(point._model.x).toBeCloseToPixel(0);
// 2 points
chart.data.labels = ['One', 'Two'];
chart.data.datasets[0].data = [1, 2];
chart.update();
var points = meta.data;
expect(points[0]._model.x).toBeCloseToPixel(0);
expect(points[1]._model.x).toBeCloseToPixel(512);
// 3 points
chart.data.labels = ['One', 'Two', 'Three'];
chart.data.datasets[0].data = [1, 2, 3];
chart.update();
points = meta.data;
expect(points[0]._model.x).toBeCloseToPixel(0);
expect(points[1]._model.x).toBeCloseToPixel(256);
expect(points[2]._model.x).toBeCloseToPixel(512);
// 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]._model.x).toBeCloseToPixel(0);
expect(points[1]._model.x).toBeCloseToPixel(171);
expect(points[2]._model.x).toBeCloseToPixel(340);
expect(points[3]._model.x).toBeCloseToPixel(512);
});
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: {
legend: false,
title: false,
scales: {
xAxes: [{
display: false,
}],
yAxes: [{
display: false,
stacked: true
}]
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 0, y: 146},
{x: 171, y: 439},
{x: 341, y: 146},
{x: 512, y: 439}
].forEach(function(values, i) {
expect(meta0.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta0.data[i]._model.y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 0, y: 0},
{x: 171, y: 73},
{x: 341, y: 146},
{x: 512, y: 497}
].forEach(function(values, i) {
expect(meta1.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta1.data[i]._model.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: 'secondAxis'
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
legend: false,
title: false,
scales: {
xAxes: [{
display: false,
}],
yAxes: [{
display: false,
stacked: true
}, {
id: 'secondAxis',
type: 'linear',
display: false
}]
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 0, y: 146},
{x: 171, y: 439},
{x: 341, y: 146},
{x: 512, y: 439}
].forEach(function(values, i) {
expect(meta0.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta0.data[i]._model.y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 0, y: 0},
{x: 171, y: 73},
{x: 341, y: 146},
{x: 512, y: 497}
].forEach(function(values, i) {
expect(meta1.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta1.data[i]._model.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: {
legend: false,
title: false,
scales: {
xAxes: [{
display: false,
}],
yAxes: [{
display: false,
stacked: true
}]
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 0, y: 146},
{x: 171, y: 439},
{x: 341, y: 146},
{x: 512, y: 439}
].forEach(function(values, i) {
expect(meta0.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta0.data[i]._model.y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 0, y: 0},
{x: 171, y: 73},
{x: 341, y: 146},
{x: 512, y: 497}
].forEach(function(values, i) {
expect(meta1.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta1.data[i]._model.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: {
legend: false,
title: false,
scales: {
xAxes: [{
display: false,
}],
yAxes: [{
display: false,
stacked: true
}]
}
}
});
var meta0 = chart.getDatasetMeta(0);
[
{x: 0, y: 146},
{x: 171, y: 439},
{x: 341, y: 146},
{x: 512, y: 439}
].forEach(function(values, i) {
expect(meta0.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta0.data[i]._model.y).toBeCloseToPixel(values.y);
});
var meta1 = chart.getDatasetMeta(1);
[
{x: 0, y: 0},
{x: 171, y: 73},
{x: 341, y: 146},
{x: 512, y: 497}
].forEach(function(values, i) {
expect(meta1.data[i]._model.x).toBeCloseToPixel(values.x);
expect(meta1.data[i]._model.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._model.backgroundColor).toBe('rgb(98, 98, 98)');
expect(meta.dataset._model.borderColor).toBe('rgb(8, 8, 8)');
expect(meta.dataset._model.borderWidth).toBe(0.55);
});
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.Point).toBe(true);
expect(meta.data[1] instanceof Chart.elements.Point).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.Point).toBe(true);
expect(meta.data[1] instanceof Chart.elements.Point).toBe(true);
expect(meta.data[2] instanceof Chart.elements.Point).toBe(true);
expect(meta.data[3] instanceof Chart.elements.Point).toBe(true);
expect(meta.data[4] instanceof Chart.elements.Point).toBe(true);
});
it('should set point hover styles', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1',
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
elements: {
point: {
backgroundColor: 'rgb(255, 255, 0)',
borderWidth: 1,
borderColor: 'rgb(255, 255, 255)',
hitRadius: 1,
hoverRadius: 4,
hoverBorderWidth: 1,
radius: 3,
}
}
}
});
var meta = chart.getDatasetMeta(0);
var point = meta.data[0];
meta.controller.setHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(229, 230, 0)');
expect(point._model.borderColor).toBe('rgb(230, 230, 230)');
expect(point._model.borderWidth).toBe(1);
expect(point._model.radius).toBe(4);
// Can set hover style per dataset
chart.data.datasets[0].pointHoverRadius = 3.3;
chart.data.datasets[0].pointHoverBackgroundColor = 'rgb(77, 79, 81)';
chart.data.datasets[0].pointHoverBorderColor = 'rgb(123, 125, 127)';
chart.data.datasets[0].pointHoverBorderWidth = 2.1;
meta.controller.setHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(77, 79, 81)');
expect(point._model.borderColor).toBe('rgb(123, 125, 127)');
expect(point._model.borderWidth).toBe(2.1);
expect(point._model.radius).toBe(3.3);
// Use the consistent name "pointRadius", setting but overwriting
// another value in "radius"
chart.data.datasets[0].pointRadius = 250;
chart.data.datasets[0].radius = 20;
meta.controller.setHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(77, 79, 81)');
expect(point._model.borderColor).toBe('rgb(123, 125, 127)');
expect(point._model.borderWidth).toBe(2.1);
expect(point._model.radius).toBe(3.3);
// Custom style
point.custom = {
hoverRadius: 4.4,
hoverBorderWidth: 5.5,
hoverBackgroundColor: 'rgb(0, 0, 0)',
hoverBorderColor: 'rgb(10, 10, 10)'
};
meta.controller.setHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(0, 0, 0)');
expect(point._model.borderColor).toBe('rgb(10, 10, 10)');
expect(point._model.borderWidth).toBe(5.5);
expect(point._model.radius).toBe(4.4);
});
it('should remove hover styles', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 15, 0, -4],
label: 'dataset1',
}],
labels: ['label1', 'label2', 'label3', 'label4']
},
options: {
elements: {
point: {
backgroundColor: 'rgb(255, 255, 0)',
borderWidth: 1,
borderColor: 'rgb(255, 255, 255)',
hitRadius: 1,
hoverRadius: 4,
hoverBorderWidth: 1,
radius: 3,
}
}
}
});
var meta = chart.getDatasetMeta(0);
var point = meta.data[0];
chart.options.elements.point.backgroundColor = 'rgb(45, 46, 47)';
chart.options.elements.point.borderColor = 'rgb(50, 51, 52)';
chart.options.elements.point.borderWidth = 10.1;
chart.options.elements.point.radius = 1.01;
meta.controller.removeHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(45, 46, 47)');
expect(point._model.borderColor).toBe('rgb(50, 51, 52)');
expect(point._model.borderWidth).toBe(10.1);
expect(point._model.radius).toBe(1.01);
// Can set hover style per dataset
chart.data.datasets[0].radius = 3.3;
chart.data.datasets[0].pointBackgroundColor = 'rgb(77, 79, 81)';
chart.data.datasets[0].pointBorderColor = 'rgb(123, 125, 127)';
chart.data.datasets[0].pointBorderWidth = 2.1;
meta.controller.removeHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(77, 79, 81)');
expect(point._model.borderColor).toBe('rgb(123, 125, 127)');
expect(point._model.borderWidth).toBe(2.1);
expect(point._model.radius).toBe(3.3);
// Use the consistent name "pointRadius", setting but overwriting
// another value in "radius"
chart.data.datasets[0].pointRadius = 250;
chart.data.datasets[0].radius = 20;
meta.controller.removeHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(77, 79, 81)');
expect(point._model.borderColor).toBe('rgb(123, 125, 127)');
expect(point._model.borderWidth).toBe(2.1);
expect(point._model.radius).toBe(250);
// Custom style
point.custom = {
radius: 4.4,
borderWidth: 5.5,
backgroundColor: 'rgb(0, 0, 0)',
borderColor: 'rgb(10, 10, 10)'
};
meta.controller.removeHoverStyle(point);
expect(point._model.backgroundColor).toBe('rgb(0, 0, 0)');
expect(point._model.borderColor).toBe('rgb(10, 10, 10)');
expect(point._model.borderWidth).toBe(5.5);
expect(point._model.radius).toBe(4.4);
});
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._model.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]._model.borderWidth).toBe(1);
expect(meta.data[1]._model.borderWidth).toBe(2);
expect(meta.data[2]._model.borderWidth).toBe(3);
expect(meta.data[3]._model.borderWidth).toBe(4);
});
});
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