Quite good looking graph derived from d3.js http://c3js.org
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describe('c3 chart legend', function () {
'use strict';
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var chart, args;
beforeEach(function (done) {
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chart = window.initChart(chart, args, done);
});
describe('legend position', function () {
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it('should update args', function () {
args = {
data: {
columns: [
['data1', 30, 200, 100, 400, 150, 250],
['data2', 50, 20, 10, 40, 15, 25]
]
}
};
expect(true).toBeTruthy();
});
it('should be located on the center of chart', function () {
var box = chart.internal.legend.node().getBoundingClientRect();
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expect(box.left + box.right).toBe(640);
});
});
describe('legend as inset', function () {
it('should change the legend to "inset" successfully', function () {
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args = {
data: {
columns: [
['data1', 30, 200, 100, 400, 150, 250],
['data2', 50, 20, 10, 40, 15, 25]
]
},
legend: {
position: 'inset',
inset: {
step: null
}
}
};
expect(true).toBeTruthy();
});
it('should be positioned properly', function () {
var box = d3.select('.c3-legend-background').node().getBoundingClientRect();
expect(box.top).toBe(5.5);
expect(box.left).toBeGreaterThan(30);
});
it('should have automatically calculated height', function () {
var box = d3.select('.c3-legend-background').node().getBoundingClientRect();
expect(box.height).toBe(48);
});
it('should change the legend step to 1 successfully', function () {
args.legend.inset.step = 1;
expect(true).toBeTruthy();
});
it('should have automatically calculated height', function () {
var box = d3.select('.c3-legend-background').node().getBoundingClientRect();
expect(box.height).toBe(28);
});
it('should change the legend step to 2 successfully', function () {
args.legend.inset.step = 2;
expect(true).toBeTruthy();
});
it('should have automatically calculated height', function () {
var box = d3.select('.c3-legend-background').node().getBoundingClientRect();
expect(box.height).toBe(48);
});
it('should update args to have only one series', function () {
args = {
data: {
columns: [
['data1', 30, 200, 100, 400, 150, 250],
]
},
legend: {
position: 'inset'
}
};
expect(true).toBeTruthy();
});
it('should locate legend properly', function () {
var box = d3.select('.c3-legend-background').node().getBoundingClientRect();
expect(box.height).toBe(28);
expect(box.width).toBeGreaterThan(64);
});
});
describe('legend.hide', function () {
it('should update args', function () {
args = {
data: {
columns: [
['data1', 30, 200, 100, 400, 150, 250],
['data2', 130, 100, 200, 100, 250, 150]
]
},
legend: {
hide: true
}
};
expect(true).toBeTruthy();
});
it('should not show legends', function () {
d3.selectAll('.c3-legend-item').each(function () {
expect(d3.select(this).style('visibility')).toBe('hidden');
});
});
it('should update args', function () {
args = {
data: {
columns: [
['data1', 30, 200, 100, 400, 150, 250],
['data2', 130, 100, 200, 100, 250, 150]
]
},
legend: {
hide: 'data2'
}
};
expect(true).toBeTruthy();
});
it('should not show legends', function () {
expect(d3.select('.c3-legend-item-data1').style('visibility')).toBe('visible');
expect(d3.select('.c3-legend-item-data2').style('visibility')).toBe('hidden');
});
});
describe('legend.show', function () {
it('should update args', function () {
args = {
data: {
columns: [
['data1', 30, 200, 100, 400, 150, 250],
['data2', 130, 100, 200, 100, 250, 150]
]
},
legend: {
show: false
}
};
expect(true).toBeTruthy();
});
it('should not initially have rendered any legend items', function () {
expect(d3.selectAll('.c3-legend-item').empty()).toBe(true);
});
it('allows us to show the legend on showLegend call', function () {
chart.legend.show();
d3.selectAll('.c3-legend-item').each(function () {
expect(d3.select(this).style('visibility')).toBe('visible');
// This selects all the children, but we expect it to be empty
expect(d3.select(this).selectAll("*").length).not.toEqual(0);
});
});
});
});