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// Test the category scale
describe('Category scale tests', function() {
it('Should register the constructor with the scale service', function() {
var Constructor = Chart.scaleService.getScaleConstructor('category');
expect(Constructor).not.toBe(undefined);
expect(typeof Constructor).toBe('function');
});
it('Should have the correct default config', function() {
var defaultConfig = Chart.scaleService.getScaleDefaults('category');
expect(defaultConfig).toEqual({
display: true,
gridLines: {
color: 'rgba(0, 0, 0, 0.1)',
drawBorder: true,
drawOnChartArea: true,
drawTicks: true, // draw ticks extending towards the label
tickMarkLength: 10,
lineWidth: 1,
offsetGridLines: false,
display: true,
zeroLineColor: 'rgba(0,0,0,0.25)',
zeroLineWidth: 1,
zeroLineBorderDash: [],
zeroLineBorderDashOffset: 0.0,
borderDash: [],
borderDashOffset: 0.0
},
position: 'bottom',
offset: false,
scaleLabel: Chart.defaults.scale.scaleLabel,
ticks: {
beginAtZero: false,
minRotation: 0,
maxRotation: 50,
mirror: false,
padding: 0,
reverse: false,
display: true,
callback: defaultConfig.ticks.callback, // make this nicer, then check explicitly below
autoSkip: true,
autoSkipPadding: 0,
labelOffset: 0,
minor: {},
major: {},
}
});
// Is this actually a function
expect(defaultConfig.ticks.callback).toEqual(jasmine.any(Function));
});
it('Should generate ticks from the data labels', function() {
var scaleID = 'myScale';
var mockData = {
datasets: [{
yAxisID: scaleID,
data: [10, 5, 0, 25, 78]
}],
labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5']
};
var config = Chart.helpers.clone(Chart.scaleService.getScaleDefaults('category'));
var Constructor = Chart.scaleService.getScaleConstructor('category');
var scale = new Constructor({
ctx: {},
options: config,
chart: {
data: mockData
},
id: scaleID
});
scale.determineDataLimits();
scale.buildTicks();
expect(scale.ticks).toEqual(mockData.labels);
});
it('Should generate ticks from the data xLabels', function() {
var scaleID = 'myScale';
var mockData = {
datasets: [{
yAxisID: scaleID,
data: [10, 5, 0, 25, 78]
}],
xLabels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5']
};
var config = Chart.helpers.clone(Chart.scaleService.getScaleDefaults('category'));
var Constructor = Chart.scaleService.getScaleConstructor('category');
var scale = new Constructor({
ctx: {},
options: config,
chart: {
data: mockData
},
id: scaleID
});
scale.determineDataLimits();
scale.buildTicks();
expect(scale.ticks).toEqual(mockData.xLabels);
});
it('Should generate ticks from the data yLabels', function() {
var scaleID = 'myScale';
var mockData = {
datasets: [{
yAxisID: scaleID,
data: [10, 5, 0, 25, 78]
}],
yLabels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5']
};
var config = Chart.helpers.clone(Chart.scaleService.getScaleDefaults('category'));
config.position = 'left'; // y axis
var Constructor = Chart.scaleService.getScaleConstructor('category');
var scale = new Constructor({
ctx: {},
options: config,
chart: {
data: mockData
},
id: scaleID
});
scale.determineDataLimits();
scale.buildTicks();
expect(scale.ticks).toEqual(mockData.yLabels);
});
it('Should generate ticks from the axis labels', function() {
var labels = ['tick1', 'tick2', 'tick3', 'tick4', 'tick5'];
var chart = window.acquireChart({
type: 'line',
data: {
data: [10, 5, 0, 25, 78]
},
options: {
scales: {
xAxes: [{
id: 'x',
type: 'category',
labels: labels
}]
}
}
});
var scale = chart.scales.x;
expect(scale.ticks).toEqual(labels);
});
it('should get the correct label for the index', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
xAxisID: 'xScale0',
yAxisID: 'yScale0',
data: [10, 5, 0, 25, 78]
}],
labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5']
},
options: {
scales: {
xAxes: [{
id: 'xScale0',
type: 'category',
position: 'bottom'
}],
yAxes: [{
id: 'yScale0',
type: 'linear'
}]
}
}
});
var scale = chart.scales.xScale0;
expect(scale.getLabelForIndex(1, 0)).toBe('tick2');
});
it('Should get the correct pixel for a value when horizontal', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
xAxisID: 'xScale0',
yAxisID: 'yScale0',
data: [10, 5, 0, 25, 78]
}],
labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick_last']
},
options: {
scales: {
xAxes: [{
id: 'xScale0',
type: 'category',
position: 'bottom'
}],
yAxes: [{
id: 'yScale0',
type: 'linear'
}]
}
}
});
var xScale = chart.scales.xScale0;
expect(xScale.getPixelForValue(0, 0, 0)).toBeCloseToPixel(23 + 6); // plus lineHeight
expect(xScale.getValueForPixel(23)).toBe(0);
expect(xScale.getPixelForValue(0, 4, 0)).toBeCloseToPixel(487);
expect(xScale.getValueForPixel(487)).toBe(4);
xScale.options.offset = true;
chart.update();
expect(xScale.getPixelForValue(0, 0, 0)).toBeCloseToPixel(71 + 6); // plus lineHeight
expect(xScale.getValueForPixel(69)).toBe(0);
expect(xScale.getPixelForValue(0, 4, 0)).toBeCloseToPixel(461);
expect(xScale.getValueForPixel(417)).toBe(4);
});
it('Should get the correct pixel for a value when there are repeated labels', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
xAxisID: 'xScale0',
yAxisID: 'yScale0',
data: [10, 5, 0, 25, 78]
}],
labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick_last']
},
options: {
scales: {
xAxes: [{
id: 'xScale0',
type: 'category',
position: 'bottom'
}],
yAxes: [{
id: 'yScale0',
type: 'linear'
}]
}
}
});
var xScale = chart.scales.xScale0;
expect(xScale.getPixelForValue('tick_1', 0, 0)).toBeCloseToPixel(23 + 6); // plus lineHeight
expect(xScale.getPixelForValue('tick_1', 1, 0)).toBeCloseToPixel(143);
});
it('Should get the correct pixel for a value when horizontal and zoomed', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
xAxisID: 'xScale0',
yAxisID: 'yScale0',
data: [10, 5, 0, 25, 78]
}],
labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick_last']
},
options: {
scales: {
xAxes: [{
id: 'xScale0',
type: 'category',
position: 'bottom',
ticks: {
min: 'tick2',
max: 'tick4'
}
}],
yAxes: [{
id: 'yScale0',
type: 'linear'
}]
}
}
});
var xScale = chart.scales.xScale0;
expect(xScale.getPixelForValue(0, 1, 0)).toBeCloseToPixel(23 + 6); // plus lineHeight
expect(xScale.getPixelForValue(0, 3, 0)).toBeCloseToPixel(496);
xScale.options.offset = true;
chart.update();
expect(xScale.getPixelForValue(0, 1, 0)).toBeCloseToPixel(103 + 6); // plus lineHeight
expect(xScale.getPixelForValue(0, 3, 0)).toBeCloseToPixel(429);
});
it('should get the correct pixel for a value when vertical', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
xAxisID: 'xScale0',
yAxisID: 'yScale0',
data: ['3', '5', '1', '4', '2']
}],
labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5'],
yLabels: ['1', '2', '3', '4', '5']
},
options: {
scales: {
xAxes: [{
id: 'xScale0',
type: 'category',
position: 'bottom',
}],
yAxes: [{
id: 'yScale0',
type: 'category',
position: 'left'
}]
}
}
});
var yScale = chart.scales.yScale0;
expect(yScale.getPixelForValue(0, 0, 0)).toBeCloseToPixel(32);
expect(yScale.getValueForPixel(32)).toBe(0);
expect(yScale.getPixelForValue(0, 4, 0)).toBeCloseToPixel(484);
expect(yScale.getValueForPixel(484)).toBe(4);
yScale.options.offset = true;
chart.update();
expect(yScale.getPixelForValue(0, 0, 0)).toBeCloseToPixel(77);
expect(yScale.getValueForPixel(77)).toBe(0);
expect(yScale.getPixelForValue(0, 4, 0)).toBeCloseToPixel(437);
expect(yScale.getValueForPixel(437)).toBe(4);
});
it('should get the correct pixel for a value when vertical and zoomed', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
xAxisID: 'xScale0',
yAxisID: 'yScale0',
data: ['3', '5', '1', '4', '2']
}],
labels: ['tick1', 'tick2', 'tick3', 'tick4', 'tick5'],
yLabels: ['1', '2', '3', '4', '5']
},
options: {
scales: {
xAxes: [{
id: 'xScale0',
type: 'category',
position: 'bottom',
}],
yAxes: [{
id: 'yScale0',
type: 'category',
position: 'left',
ticks: {
min: '2',
max: '4'
}
}]
}
}
});
var yScale = chart.scales.yScale0;
expect(yScale.getPixelForValue(0, 1, 0)).toBeCloseToPixel(32);
expect(yScale.getPixelForValue(0, 3, 0)).toBeCloseToPixel(484);
yScale.options.offset = true;
chart.update();
expect(yScale.getPixelForValue(0, 1, 0)).toBeCloseToPixel(107);
expect(yScale.getPixelForValue(0, 3, 0)).toBeCloseToPixel(407);
});
});