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// Test the rectangle element
describe('Title block tests', function() {
it('Should have the correct default config', function() {
expect(Chart.defaults.global.title).toEqual({
display: false,
position: 'top',
fullWidth: true,
weight: 2000,
fontStyle: 'bold',
padding: 10,
text: ''
});
});
it('should update correctly', function() {
var chart = {};
var options = Chart.helpers.clone(Chart.defaults.global.title);
options.text = 'My title';
var title = new Chart.Title({
chart: chart,
options: options
});
var minSize = title.update(400, 200);
expect(minSize).toEqual({
width: 400,
height: 0
});
// Now we have a height since we display
title.options.display = true;
minSize = title.update(400, 200);
expect(minSize).toEqual({
width: 400,
height: 34.4
});
});
it('should update correctly when vertical', function() {
var chart = {};
var options = Chart.helpers.clone(Chart.defaults.global.title);
options.text = 'My title';
options.position = 'left';
var title = new Chart.Title({
chart: chart,
options: options
});
var minSize = title.update(200, 400);
expect(minSize).toEqual({
width: 0,
height: 400
});
// Now we have a height since we display
title.options.display = true;
minSize = title.update(200, 400);
expect(minSize).toEqual({
width: 34.4,
height: 400
});
});
it('should have the correct size when there are multiple lines of text', function() {
var chart = {};
var options = Chart.helpers.clone(Chart.defaults.global.title);
options.text = ['line1', 'line2'];
options.position = 'left';
options.display = true;
options.lineHeight = 1.5;
var title = new Chart.Title({
chart: chart,
options: options
});
var minSize = title.update(200, 400);
expect(minSize).toEqual({
width: 56,
height: 400
});
});
it('should draw correctly horizontally', function() {
var chart = {};
var context = window.createMockContext();
var options = Chart.helpers.clone(Chart.defaults.global.title);
options.text = 'My title';
var title = new Chart.Title({
chart: chart,
options: options,
ctx: context
});
title.update(400, 200);
title.draw();
expect(context.getCalls()).toEqual([]);
// Now we have a height since we display
title.options.display = true;
var minSize = title.update(400, 200);
title.top = 50;
title.left = 100;
title.bottom = title.top + minSize.height;
title.right = title.left + minSize.width;
title.draw();
expect(context.getCalls()).toEqual([{
name: 'setFillStyle',
args: ['#666']
}, {
name: 'save',
args: []
}, {
name: 'translate',
args: [300, 67.2]
}, {
name: 'rotate',
args: [0]
}, {
name: 'fillText',
args: ['My title', 0, 0, 400]
}, {
name: 'restore',
args: []
}]);
});
it ('should draw correctly vertically', function() {
var chart = {};
var context = window.createMockContext();
var options = Chart.helpers.clone(Chart.defaults.global.title);
options.text = 'My title';
options.position = 'left';
var title = new Chart.Title({
chart: chart,
options: options,
ctx: context
});
title.update(200, 400);
title.draw();
expect(context.getCalls()).toEqual([]);
// Now we have a height since we display
title.options.display = true;
var minSize = title.update(200, 400);
title.top = 50;
title.left = 100;
title.bottom = title.top + minSize.height;
title.right = title.left + minSize.width;
title.draw();
expect(context.getCalls()).toEqual([{
name: 'setFillStyle',
args: ['#666']
}, {
name: 'save',
args: []
}, {
name: 'translate',
args: [117.2, 250]
}, {
name: 'rotate',
args: [-0.5 * Math.PI]
}, {
name: 'fillText',
args: ['My title', 0, 0, 400]
}, {
name: 'restore',
args: []
}]);
// Rotation is other way on right side
title.options.position = 'right';
// Reset call tracker
context.resetCalls();
minSize = title.update(200, 400);
title.top = 50;
title.left = 100;
title.bottom = title.top + minSize.height;
title.right = title.left + minSize.width;
title.draw();
expect(context.getCalls()).toEqual([{
name: 'setFillStyle',
args: ['#666']
}, {
name: 'save',
args: []
}, {
name: 'translate',
args: [117.2, 250]
}, {
name: 'rotate',
args: [0.5 * Math.PI]
}, {
name: 'fillText',
args: ['My title', 0, 0, 400]
}, {
name: 'restore',
args: []
}]);
});
describe('config update', function() {
it ('should update the options', function() {
var chart = acquireChart({
type: 'line',
data: {
labels: ['A', 'B', 'C', 'D'],
datasets: [{
data: [10, 20, 30, 100]
}]
},
options: {
title: {
display: true
}
}
});
expect(chart.titleBlock.options.display).toBe(true);
chart.options.title.display = false;
chart.update();
expect(chart.titleBlock.options.display).toBe(false);
});
it ('should update the associated layout item', function() {
var chart = acquireChart({
type: 'line',
data: {},
options: {
title: {
fullWidth: true,
position: 'top',
weight: 150
}
}
});
expect(chart.titleBlock.fullWidth).toBe(true);
expect(chart.titleBlock.position).toBe('top');
expect(chart.titleBlock.weight).toBe(150);
chart.options.title.fullWidth = false;
chart.options.title.position = 'left';
chart.options.title.weight = 42;
chart.update();
expect(chart.titleBlock.fullWidth).toBe(false);
expect(chart.titleBlock.position).toBe('left');
expect(chart.titleBlock.weight).toBe(42);
});
it ('should remove the title if the new options are false', function() {
var chart = acquireChart({
type: 'line',
data: {
labels: ['A', 'B', 'C', 'D'],
datasets: [{
data: [10, 20, 30, 100]
}]
}
});
expect(chart.titleBlock).not.toBe(undefined);
chart.options.title = false;
chart.update();
expect(chart.titleBlock).toBe(undefined);
});
it ('should create the title if the title options are changed to exist', function() {
var chart = acquireChart({
type: 'line',
data: {
labels: ['A', 'B', 'C', 'D'],
datasets: [{
data: [10, 20, 30, 100]
}]
},
options: {
title: false
}
});
expect(chart.titleBlock).toBe(undefined);
chart.options.title = {};
chart.update();
expect(chart.titleBlock).not.toBe(undefined);
expect(chart.titleBlock.options).toEqual(jasmine.objectContaining(Chart.defaults.global.title));
});
});
});