describe('Logarithmic Scale tests', function() {
beforeEach(function() {
window.addDefaultMatchers(jasmine);
});
afterEach(function() {
window.releaseAllCharts();
});
it('should register the constructor with the scale service', function() {
var Constructor = Chart.scaleService.getScaleConstructor('logarithmic');
expect(Constructor).not.toBe(undefined);
expect(typeof Constructor).toBe('function');
});
it('should have the correct default config', function() {
var defaultConfig = Chart.scaleService.getScaleDefaults('logarithmic');
expect(defaultConfig).toEqual({
display: true,
gridLines: {
color: "rgba(0, 0, 0, 0.1)",
drawBorder: true,
drawOnChartArea: true,
drawTicks: true,
tickMarkLength: 10,
lineWidth: 1,
offsetGridLines: false,
display: true,
zeroLineColor: "rgba(0,0,0,0.25)",
zeroLineWidth: 1,
},
position: "left",
scaleLabel: {
labelString: '',
display: false,
},
ticks: {
beginAtZero: false,
minRotation: 0,
maxRotation: 50,
mirror: false,
padding: 10,
reverse: false,
display: true,
callback: defaultConfig.ticks.callback, // make this nicer, then check explicitly below
autoSkip: true,
autoSkipPadding: 0,
labelOffset: 0
},
});
// Is this actually a function
expect(defaultConfig.ticks.callback).toEqual(jasmine.any(Function));
});
it('should correctly determine the max & min data values', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
yAxisID: 'yScale0',
data: [42, 1000, 64, 100],
}, {
yAxisID: 'yScale1',
data: [10, 5, 5000, 78, 450]
}, {
yAxisID: 'yScale1',
data: [150]
}],
labels: ['a', 'b', 'c', 'd', 'e']
},
options: {
scales: {
yAxes: [{
id: 'yScale0',
type: 'logarithmic'
}, {
id: 'yScale1',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale0).not.toEqual(undefined); // must construct
expect(chart.scales.yScale0.min).toBe(10);
expect(chart.scales.yScale0.max).toBe(1000);
expect(chart.scales.yScale1).not.toEqual(undefined); // must construct
expect(chart.scales.yScale1.min).toBe(1);
expect(chart.scales.yScale1.max).toBe(5000);
});
it('should correctly determine the max & min of string data values', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
yAxisID: 'yScale0',
data: ['42', '1000', '64', '100'],
}, {
yAxisID: 'yScale1',
data: ['10', '5', '5000', '78', '450']
}, {
yAxisID: 'yScale1',
data: ['150']
}],
labels: ['a', 'b', 'c', 'd', 'e']
},
options: {
scales: {
yAxes: [{
id: 'yScale0',
type: 'logarithmic'
}, {
id: 'yScale1',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale0).not.toEqual(undefined); // must construct
expect(chart.scales.yScale0.min).toBe(10);
expect(chart.scales.yScale0.max).toBe(1000);
expect(chart.scales.yScale1).not.toEqual(undefined); // must construct
expect(chart.scales.yScale1.min).toBe(1);
expect(chart.scales.yScale1.max).toBe(5000);
});
it('should correctly determine the max & min data values when there are hidden datasets', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
yAxisID: 'yScale1',
data: [10, 5, 5000, 78, 450]
}, {
yAxisID: 'yScale0',
data: [42, 1000, 64, 100],
}, {
yAxisID: 'yScale1',
data: [50000],
hidden: true
}],
labels: ['a', 'b', 'c', 'd', 'e']
},
options: {
scales: {
yAxes: [{
id: 'yScale0',
type: 'logarithmic'
}, {
id: 'yScale1',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale1).not.toEqual(undefined); // must construct
expect(chart.scales.yScale1.min).toBe(1);
expect(chart.scales.yScale1.max).toBe(5000);
});
it('should correctly determine the max & min data values when there is NaN data', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
data: [undefined, 10, null, 5, 5000, NaN, 78, 450]
}, {
data: [undefined, 28, null, 1000, 500, NaN, 50, 42]
}],
labels: ['a', 'b', 'c', 'd', 'e', 'f' ,'g']
},
options: {
scales: {
yAxes: [{
id: 'yScale',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale).not.toEqual(undefined); // must construct
expect(chart.scales.yScale.min).toBe(1);
expect(chart.scales.yScale.max).toBe(5000);
// Turn on stacked mode since it uses it's own
chart.options.scales.yAxes[0].stacked = true;
chart.update();
expect(chart.scales.yScale.min).toBe(10);
expect(chart.scales.yScale.max).toBe(6000);
});
it('should correctly determine the max & min for scatter data', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [
{ x: 10, y: 100 },
{ x: 2, y: 6 },
{ x: 65, y: 121 },
{ x: 99, y: 7 }
]
}]
},
options: {
scales: {
xAxes: [{
id: 'xScale',
type: 'logarithmic',
position: 'bottom'
}],
yAxes: [{
id: 'yScale',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.xScale.min).toBe(1);
expect(chart.scales.xScale.max).toBe(100);
expect(chart.scales.yScale.min).toBe(1);
expect(chart.scales.yScale.max).toBe(200);
});
it('should correctly determine the min and max data values when stacked mode is turned on', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
type: 'bar',
yAxisID: 'yScale0',
data: [10, 5, 1, 5, 78, 100]
}, {
yAxisID: 'yScale1',
data: [-1000, 1000],
}, {
type: 'bar',
yAxisID: 'yScale0',
data: [150, 10, 10, 100, 10, 9]
}, {
type: 'line',
yAxisID: 'yScale0',
data: [100, 100, 100, 100, 100, 100]
}],
labels: ['a', 'b', 'c', 'd', 'e', 'f']
},
options: {
scales: {
yAxes: [{
id: 'yScale0',
type: 'logarithmic',
stacked: true
}, {
id: 'yScale1',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale0.min).toBe(10);
expect(chart.scales.yScale0.max).toBe(200);
});
it('should correctly determine the min and max data values when stacked mode is turned on ignoring hidden datasets', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
yAxisID: 'yScale0',
data: [10, 5, 1, 5, 78, 100],
type: 'bar'
}, {
yAxisID: 'yScale1',
data: [-1000, 1000],
type: 'bar'
}, {
yAxisID: 'yScale0',
data: [150, 10, 10, 100, 10, 9],
type: 'bar'
}, {
yAxisID: 'yScale0',
data: [10000, 10000, 10000, 10000, 10000, 10000],
hidden: true,
type: 'bar'
}],
labels: ['a', 'b', 'c', 'd', 'e', 'f']
},
options: {
scales: {
yAxes: [{
id: 'yScale0',
type: 'logarithmic',
stacked: true
}, {
id: 'yScale1',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale0.min).toBe(10);
expect(chart.scales.yScale0.max).toBe(200);
});
it('should ensure that the scale has a max and min that are not equal', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
data: []
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'yScale',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale.min).toBe(1);
expect(chart.scales.yScale.max).toBe(10);
chart.data.datasets[0].data = [0.15, 0.15];
chart.update();
expect(chart.scales.yScale.min).toBe(0.01);
expect(chart.scales.yScale.max).toBe(1);
});
it('should use the min and max options', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
data: [1, 1, 1, 2, 1, 0]
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'yScale',
type: 'logarithmic',
ticks: {
min: 10,
max: 1010,
callback: function(value) {
return value;
}
}
}]
}
}
});
var yScale = chart.scales.yScale;
var tickCount = yScale.ticks.length;
expect(yScale.min).toBe(10);
expect(yScale.max).toBe(1010);
expect(yScale.ticks[0]).toBe(1010);
expect(yScale.ticks[tickCount - 1]).toBe(10);
});
it('should generate tick marks', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
data: [10, 5, 1, 25, 78]
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'yScale',
type: 'logarithmic',
ticks: {
callback: function(value) {
return value;
}
}
}]
}
}
});
// Counts down because the lines are drawn top to bottom
expect(chart.scales.yScale).toEqual(jasmine.objectContaining({
ticks: [80, 70, 60, 50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1],
start: 1,
end: 80
}));
});
it('should generate tick marks in the correct order in reversed mode', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 5, 1, 25, 78]
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'yScale',
type: 'logarithmic',
ticks: {
reverse: true,
callback: function(value) {
return value;
}
}
}]
}
}
});
// Counts down because the lines are drawn top to bottom
expect(chart.scales.yScale).toEqual(jasmine.objectContaining({
ticks: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80],
start: 80,
end: 1
}));
});
it('should build labels using the default template', function() {
var chart = window.acquireChart({
type: 'line',
data: {
datasets: [{
data: [10, 5, 1, 25, 78]
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'yScale',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale.ticks).toEqual(['8e+1', '', '', '5e+1', '', '', '2e+1', '1e+1', '', '', '', '', '5e+0', '', '', '2e+0', '1e+0']);
});
it('should build labels using the user supplied callback', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
data: [10, 5, 1, 25, 78]
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'yScale',
type: 'logarithmic',
ticks: {
callback: function(value, index) {
return index.toString();
}
}
}]
}
}
});
// Just the index
expect(chart.scales.yScale.ticks).toEqual(['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16']);
});
it('should correctly get the correct label for a data item', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
yAxisID: 'yScale0',
data: [10, 5, 5000, 78, 450]
}, {
yAxisID: 'yScale1',
data: [1, 1000, 10, 100],
}, {
yAxisID: 'yScale0',
data: [150]
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'yScale0',
type: 'logarithmic'
}, {
id: 'yScale1',
type: 'logarithmic'
}]
}
}
});
expect(chart.scales.yScale1.getLabelForIndex(0, 2)).toBe(150);
});
it('should get the correct pixel value for a point', function() {
var chart = window.acquireChart({
type: 'bar',
data: {
datasets: [{
xAxisID: 'xScale', // for the horizontal scale
yAxisID: 'yScale',
data: [10, 5, 1, 25, 78]
}],
labels: []
},
options: {
scales: {
yAxes: [{
id: 'xScale',
type: 'logarithmic',
position: 'bottom'
}, {
id: 'yScale',
type: 'logarithmic'
}]
}
}
});
var xScale = chart.scales.xScale;
expect(xScale.getPixelForValue(80, 0, 0)).toBeCloseToPixel(495); // right - paddingRight
expect(xScale.getPixelForValue( 1, 0, 0)).toBeCloseToPixel(48); // left + paddingLeft
expect(xScale.getPixelForValue(10, 0, 0)).toBeCloseToPixel(283); // halfway
expect(xScale.getPixelForValue( 0, 0, 0)).toBeCloseToPixel(48); // 0 is invalid, put it on the left.
expect(xScale.getValueForPixel(495)).toBeCloseTo(80, 1e-4);
expect(xScale.getValueForPixel(48)).toBeCloseTo(1, 1e-4);
expect(xScale.getValueForPixel(283)).toBeCloseTo(10, 1e-4);
var yScale = chart.scales.yScale;
expect(yScale.getPixelForValue(80, 0, 0)).toBeCloseToPixel(32); // top + paddingTop
expect(yScale.getPixelForValue( 1, 0, 0)).toBeCloseToPixel(456); // bottom - paddingBottom
expect(yScale.getPixelForValue(10, 0, 0)).toBeCloseToPixel(234); // halfway
expect(yScale.getPixelForValue( 0, 0, 0)).toBeCloseToPixel(32); // 0 is invalid. force it on top
expect(yScale.getValueForPixel(32)).toBeCloseTo(80, 1e-4);
expect(yScale.getValueForPixel(456)).toBeCloseTo(1, 1e-4);
expect(yScale.getValueForPixel(234)).toBeCloseTo(10, 1e-4);
});
});
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