// Tests for the line element
describe('Line element tests', function() {
it('should be constructed', function() {
var line = new Chart.elements.Line({
_datasetindex: 2,
_points: [1, 2, 3, 4]
});
expect(line).not.toBe(undefined);
expect(line._datasetindex).toBe(2);
expect(line._points).toEqual([1, 2, 3, 4]);
});
it('should draw with default settings', function() {
var mockContext = window.createMockContext();
// Create our points
var points = [];
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 0,
_view: {
x: 0,
y: 10,
controlPointNextX: 0,
controlPointNextY: 10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 1,
_view: {
x: 5,
y: 0,
controlPointPreviousX: 5,
controlPointPreviousY: 0,
controlPointNextX: 5,
controlPointNextY: 0
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 2,
_view: {
x: 15,
y: -10,
controlPointPreviousX: 15,
controlPointPreviousY: -10,
controlPointNextX: 15,
controlPointNextY: -10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 3,
_view: {
x: 19,
y: -5,
controlPointPreviousX: 19,
controlPointPreviousY: -5,
controlPointNextX: 19,
controlPointNextY: -5
}
}));
var line = new Chart.elements.Line({
_datasetindex: 2,
_chart: {
ctx: mockContext,
},
_children: points,
// Need to provide some settings
_view: {
fill: false, // don't want to fill
tension: 0.0, // no bezier curve for now
scaleZero: 0
}
});
line.draw();
expect(mockContext.getCalls()).toEqual([{
name: 'save',
args: [],
}, {
name: 'setLineCap',
args: ['butt']
}, {
name: 'setLineDash',
args: [
[]
]
}, {
name: 'setLineDashOffset',
args: [0.0]
}, {
name: 'setLineJoin',
args: ['miter']
}, {
name: 'setLineWidth',
args: [3]
}, {
name: 'setStrokeStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'stroke',
args: [],
}, {
name: 'restore',
args: []
}]);
});
it('should draw with custom settings', function() {
var mockContext = window.createMockContext();
// Create our points
var points = [];
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 0,
_view: {
x: 0,
y: 10,
controlPointNextX: 0,
controlPointNextY: 10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 1,
_view: {
x: 5,
y: 0,
controlPointPreviousX: 5,
controlPointPreviousY: 0,
controlPointNextX: 5,
controlPointNextY: 0
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 2,
_view: {
x: 15,
y: -10,
controlPointPreviousX: 15,
controlPointPreviousY: -10,
controlPointNextX: 15,
controlPointNextY: -10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 3,
_view: {
x: 19,
y: -5,
controlPointPreviousX: 19,
controlPointPreviousY: -5,
controlPointNextX: 19,
controlPointNextY: -5
}
}));
var line = new Chart.elements.Line({
_datasetindex: 2,
_chart: {
ctx: mockContext,
},
_children: points,
// Need to provide some settings
_view: {
fill: true,
scaleZero: 2, // for filling lines
tension: 0.0, // no bezier curve for now
borderCapStyle: 'round',
borderColor: 'rgb(255, 255, 0)',
borderDash: [2, 2],
borderDashOffset: 1.5,
borderJoinStyle: 'bevel',
borderWidth: 4,
backgroundColor: 'rgb(0, 0, 0)'
}
});
line.draw();
var expected = [{
name: 'save',
args: [],
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 2]
}, {
name: 'lineTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'lineTo',
args: [19, 2]
}, {
name: 'lineTo',
args: [0, 2]
}, {
name: 'setFillStyle',
args: ['rgb(0, 0, 0)']
}, {
name: 'closePath',
args: []
}, {
name: 'fill',
args: []
}, {
name: 'setLineCap',
args: ['round']
}, {
name: 'setLineDash',
args: [
[2, 2]
]
}, {
name: 'setLineDashOffset',
args: [1.5]
}, {
name: 'setLineJoin',
args: ['bevel']
}, {
name: 'setLineWidth',
args: [4]
}, {
name: 'setStrokeStyle',
args: ['rgb(255, 255, 0)']
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'stroke',
args: [],
}, {
name: 'restore',
args: []
}];
expect(mockContext.getCalls()).toEqual(expected);
});
it ('should skip points correctly', function() {
var mockContext = window.createMockContext();
// Create our points
var points = [];
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 0,
_view: {
x: 0,
y: 10,
controlPointNextX: 0,
controlPointNextY: 10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 1,
_view: {
x: 5,
y: 0,
controlPointPreviousX: 5,
controlPointPreviousY: 0,
controlPointNextX: 5,
controlPointNextY: 0
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 2,
_view: {
x: 15,
y: -10,
controlPointPreviousX: 15,
controlPointPreviousY: -10,
controlPointNextX: 15,
controlPointNextY: -10,
skip: true
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 3,
_view: {
x: 19,
y: -5,
controlPointPreviousX: 19,
controlPointPreviousY: -5,
controlPointNextX: 19,
controlPointNextY: -5
}
}));
var line = new Chart.elements.Line({
_datasetindex: 2,
_chart: {
ctx: mockContext,
},
_children: points,
// Need to provide some settings
_view: {
fill: true,
scaleZero: 2, // for filling lines
tension: 0.0, // no bezier curve for now
}
});
line.draw();
var expected = [{
name: 'save',
args: []
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 2]
}, {
name: 'lineTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'lineTo',
args: [5, 2]
}, {
name: 'moveTo',
args: [19, 2]
}, {
name: 'lineTo',
args: [19, -5]
}, {
name: 'lineTo',
args: [19, 2]
}, {
name: 'lineTo',
args: [0, 2]
}, {
name: 'setFillStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'closePath',
args: []
}, {
name: 'fill',
args: []
}, {
name: 'setLineCap',
args: ['butt']
}, {
name: 'setLineDash',
args: [
[]
]
}, {
name: 'setLineDashOffset',
args: [0.0]
}, {
name: 'setLineJoin',
args: ['miter']
}, {
name: 'setLineWidth',
args: [3]
}, {
name: 'setStrokeStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'moveTo',
args: [19, -5]
}, {
name: 'moveTo',
args: [19, -5]
}, {
name: 'stroke',
args: [],
}, {
name: 'restore',
args: []
}];
expect(mockContext.getCalls()).toEqual(expected);
});
it('should be able to draw with a loop back to the beginning point', function() {
var mockContext = window.createMockContext();
// Create our points
var points = [];
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 0,
_view: {
x: 0,
y: 10,
controlPointPreviousX: 0,
controlPointPreviousY: 10,
controlPointNextX: 0,
controlPointNextY: 10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 1,
_view: {
x: 5,
y: 0,
controlPointPreviousX: 5,
controlPointPreviousY: 0,
controlPointNextX: 5,
controlPointNextY: 0
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 2,
_view: {
x: 15,
y: -10,
controlPointPreviousX: 15,
controlPointPreviousY: -10,
controlPointNextX: 15,
controlPointNextY: -10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 3,
_view: {
x: 19,
y: -5,
controlPointPreviousX: 19,
controlPointPreviousY: -5,
controlPointNextX: 19,
controlPointNextY: -5
}
}));
var line = new Chart.elements.Line({
_datasetindex: 2,
_chart: {
ctx: mockContext,
},
_children: points,
_loop: true, // want the line to loop back to the first point
// Need to provide some settings
_view: {
fill: true, // don't want to fill
tension: 0.0, // no bezier curve for now
scaleZero: {
x: 3,
y: 2
},
}
});
line.draw();
expect(mockContext.getCalls()).toEqual([{
name: 'save',
args: [],
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [3, 2]
}, {
name: 'lineTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'bezierCurveTo',
args: [19, -5, 0, 10, 0, 10]
}, {
name: 'setFillStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'closePath',
args: []
}, {
name: 'fill',
args: []
}, {
name: 'setLineCap',
args: ['butt']
}, {
name: 'setLineDash',
args: [
[]
]
}, {
name: 'setLineDashOffset',
args: [0.0]
}, {
name: 'setLineJoin',
args: ['miter']
}, {
name: 'setLineWidth',
args: [3]
}, {
name: 'setStrokeStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'bezierCurveTo',
args: [19, -5, 0, 10, 0, 10]
}, {
name: 'stroke',
args: [],
}, {
name: 'restore',
args: []
}]);
});
it('should be able to draw with a loop back to the beginning point when there is a skip in the middle of the dataset', function() {
var mockContext = window.createMockContext();
// Create our points
var points = [];
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 0,
_view: {
x: 0,
y: 10,
controlPointPreviousX: 0,
controlPointPreviousY: 10,
controlPointNextX: 0,
controlPointNextY: 10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 1,
_view: {
x: 5,
y: 0,
controlPointPreviousX: 5,
controlPointPreviousY: 0,
controlPointNextX: 5,
controlPointNextY: 0,
skip: true
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 2,
_view: {
x: 15,
y: -10,
controlPointPreviousX: 15,
controlPointPreviousY: -10,
controlPointNextX: 15,
controlPointNextY: -10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 3,
_view: {
x: 19,
y: -5,
controlPointPreviousX: 19,
controlPointPreviousY: -5,
controlPointNextX: 19,
controlPointNextY: -5
}
}));
var line = new Chart.elements.Line({
_datasetindex: 2,
_chart: {
ctx: mockContext,
},
_children: points,
_loop: true, // want the line to loop back to the first point
// Need to provide some settings
_view: {
fill: true, // don't want to fill
tension: 0.0, // no bezier curve for now
scaleZero: {
x: 3,
y: 2
},
}
});
line.draw();
expect(mockContext.getCalls()).toEqual([{
name: 'save',
args: [],
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [3, 2]
}, {
name: 'lineTo',
args: [0, 10]
}, {
name: 'lineTo',
args: [3, 2]
}, {
name: 'lineTo',
args: [15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'bezierCurveTo',
args: [19, -5, 0, 10, 0, 10]
}, {
name: 'setFillStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'closePath',
args: []
}, {
name: 'fill',
args: []
}, {
name: 'setLineCap',
args: ['butt']
}, {
name: 'setLineDash',
args: [
[]
]
}, {
name: 'setLineDashOffset',
args: [0.0]
}, {
name: 'setLineJoin',
args: ['miter']
}, {
name: 'setLineWidth',
args: [3]
}, {
name: 'setStrokeStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 10]
}, {
name: 'moveTo',
args: [15, -10]
}, {
name: 'moveTo',
args: [15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'bezierCurveTo',
args: [19, -5, 0, 10, 0, 10]
}, {
name: 'stroke',
args: [],
}, {
name: 'restore',
args: []
}]);
});
it('should be able to draw with a loop back to the beginning point when the first point is skipped', function() {
var mockContext = window.createMockContext();
// Create our points
var points = [];
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 0,
_view: {
x: 0,
y: 10,
controlPointPreviousX: 0,
controlPointPreviousY: 10,
controlPointNextX: 0,
controlPointNextY: 10,
skip: true
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 1,
_view: {
x: 5,
y: 0,
controlPointPreviousX: 5,
controlPointPreviousY: 0,
controlPointNextX: 5,
controlPointNextY: 0,
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 2,
_view: {
x: 15,
y: -10,
controlPointPreviousX: 15,
controlPointPreviousY: -10,
controlPointNextX: 15,
controlPointNextY: -10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 3,
_view: {
x: 19,
y: -5,
controlPointPreviousX: 19,
controlPointPreviousY: -5,
controlPointNextX: 19,
controlPointNextY: -5
}
}));
var line = new Chart.elements.Line({
_datasetindex: 2,
_chart: {
ctx: mockContext,
},
_children: points,
_loop: true, // want the line to loop back to the first point
// Need to provide some settings
_view: {
fill: true, // don't want to fill
tension: 0.0, // no bezier curve for now
scaleZero: {
x: 3,
y: 2
},
}
});
line.draw();
expect(mockContext.getCalls()).toEqual([{
name: 'save',
args: [],
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [3, 2]
}, {
name: 'lineTo',
args: [5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'lineTo',
args: [3, 2]
}, {
name: 'setFillStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'closePath',
args: []
}, {
name: 'fill',
args: []
}, {
name: 'setLineCap',
args: ['butt']
}, {
name: 'setLineDash',
args: [
[]
]
}, {
name: 'setLineDashOffset',
args: [0.0]
}, {
name: 'setLineJoin',
args: ['miter']
}, {
name: 'setLineWidth',
args: [3]
}, {
name: 'setStrokeStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 10]
}, {
name: 'moveTo',
args: [5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'bezierCurveTo',
args: [15, -10, 19, -5, 19, -5]
}, {
name: 'stroke',
args: [],
}, {
name: 'restore',
args: []
}]);
});
it('should be able to draw with a loop back to the beginning point when the last point is skipped', function() {
var mockContext = window.createMockContext();
// Create our points
var points = [];
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 0,
_view: {
x: 0,
y: 10,
controlPointPreviousX: 0,
controlPointPreviousY: 10,
controlPointNextX: 0,
controlPointNextY: 10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 1,
_view: {
x: 5,
y: 0,
controlPointPreviousX: 5,
controlPointPreviousY: 0,
controlPointNextX: 5,
controlPointNextY: 0,
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 2,
_view: {
x: 15,
y: -10,
controlPointPreviousX: 15,
controlPointPreviousY: -10,
controlPointNextX: 15,
controlPointNextY: -10
}
}));
points.push(new Chart.elements.Point({
_datasetindex: 2,
_index: 3,
_view: {
x: 19,
y: -5,
controlPointPreviousX: 19,
controlPointPreviousY: -5,
controlPointNextX: 19,
controlPointNextY: -5,
skip: true
}
}));
var line = new Chart.elements.Line({
_datasetindex: 2,
_chart: {
ctx: mockContext,
},
_children: points,
_loop: true, // want the line to loop back to the first point
// Need to provide some settings
_view: {
fill: true, // don't want to fill
tension: 0.0, // no bezier curve for now
scaleZero: {
x: 3,
y: 2
},
}
});
line.draw();
expect(mockContext.getCalls()).toEqual([{
name: 'save',
args: [],
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [3, 2]
}, {
name: 'lineTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'lineTo',
args: [3, 2]
}, {
name: 'lineTo',
args: [3, 2]
}, {
name: 'setFillStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'closePath',
args: []
}, {
name: 'fill',
args: []
}, {
name: 'setLineCap',
args: ['butt']
}, {
name: 'setLineDash',
args: [
[]
]
}, {
name: 'setLineDashOffset',
args: [0.0]
}, {
name: 'setLineJoin',
args: ['miter']
}, {
name: 'setLineWidth',
args: [3]
}, {
name: 'setStrokeStyle',
args: ['rgba(0,0,0,0.1)']
}, {
name: 'beginPath',
args: []
}, {
name: 'moveTo',
args: [0, 10]
}, {
name: 'bezierCurveTo',
args: [0, 10, 5, 0, 5, 0]
}, {
name: 'bezierCurveTo',
args: [5, 0, 15, -10, 15, -10]
}, {
name: 'moveTo',
args: [19, -5]
}, {
name: 'stroke',
args: [],
}, {
name: 'restore',
args: []
}]);
});
});
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