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html-legend-spec.js
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/* global appendChartID, loadDateFixture */
describe('dc.htmlLegend', () => {
let id, chart, dateDimension, dateValueSumGroup, dateIdSumGroup, legend, legendId;
function legendItem (n, orientation) {
return d3.select(legend.selectAll(`div.dc-html-legend div.dc-legend-item-${orientation}`).nodes()[n]);
}
function legendLabel (n, orientation) {
return d3.select(legend.selectAll(`div.dc-html-legend div.dc-legend-item-${
orientation} span.dc-legend-item-label`).nodes()[n]);
}
function legendIcon (n, orientation) {
return d3.select(legend.selectAll(`div.dc-html-legend div.dc-legend-item-${
orientation} span.dc-legend-item-color`).nodes()[n]);
}
describe('htmlLegend for lineChart', () => {
beforeEach(() => {
const data = crossfilter(loadDateFixture());
dateDimension = data.dimension(d => d3.timeDay(d.dd));
dateValueSumGroup = dateDimension.group().reduceSum(d => d.value);
dateIdSumGroup = dateDimension.group().reduceSum(d => d.id);
id = 'html-legend-chart';
legendId = 'html-legend-chart-legend';
appendChartID(id);
appendChartID(legendId);
chart = new dc.LineChart(`#${id}`);
chart
.dimension(dateDimension)
.group(dateIdSumGroup, 'Id Sum')
.stack(dateValueSumGroup, 'Value Sum')
.stack(dateValueSumGroup, 'Fixed', () => {
})
.x(d3.scaleTime().domain([new Date(2012, 4, 20), new Date(2012, 7, 15)]))
.legend(new dc.HtmlLegend().container(`#${legendId}`));
legend = d3.select(`#${legendId}`);
});
describe('rendering the legend', () => {
beforeEach(() => {
chart.render();
});
it('should generate a legend', () => {
expect(legend.select('div.dc-html-legend').empty()).toBeFalsy();
});
it('should generate a legend item for each stacked line', () => {
expect(legend.select('div.dc-html-legend').selectAll('.dc-legend-item-vertical').size()).toBe(3);
});
it('should generate legend item boxes', () => {
expect(legendIcon(0, 'vertical').style('background-color')).toBe('rgb(31, 119, 180)');
expect(legendIcon(1, 'vertical').style('background-color')).toBe('rgb(255, 127, 14)');
expect(legendIcon(2, 'vertical').style('background-color')).toBe('rgb(44, 160, 44)');
});
it('should generate legend labels', () => {
expect(legendLabel(0, 'vertical').text()).toBe('Id Sum');
expect(legendLabel(1, 'vertical').text()).toBe('Value Sum');
expect(legendLabel(2, 'vertical').text()).toBe('Fixed');
});
it('not allow hiding stacks be default', () => {
dc.d3compat.callHandler(legendItem(0, 'vertical').on('click'),
legendItem(0).nodes()[0], {}, legendItem(0, 'vertical').datum());
expect(chart.selectAll('path.line').size()).toBe(3);
});
});
describe('with .horizontal(true)', () => {
beforeEach(() => {
chart.legend(new dc.HtmlLegend().container(`#${legendId}`).horizontal(true));
chart.render();
});
it('should generate a legend', () => {
expect(legend.select('div.dc-html-legend').empty()).toBeFalsy();
});
it('should generate a legend item for each stacked line', () => {
expect(legend.select('div.dc-html-legend').selectAll('div.dc-legend-item-horizontal').size()).toBe(3);
});
it('should generate legend item boxes', () => {
expect(legendIcon(0, 'horizontal').style('background-color')).toBe('rgb(31, 119, 180)');
expect(legendIcon(1, 'horizontal').style('background-color')).toBe('rgb(255, 127, 14)');
expect(legendIcon(2, 'horizontal').style('background-color')).toBe('rgb(44, 160, 44)');
});
it('should generate legend labels', () => {
expect(legendLabel(0, 'horizontal').text()).toBe('Id Sum');
expect(legendLabel(1, 'horizontal').text()).toBe('Value Sum');
expect(legendLabel(2, 'horizontal').text()).toBe('Fixed');
});
it('not allow hiding stacks be default', () => {
const firstLegendItem = legendItem(0, 'horizontal');
dc.d3compat.callHandler(firstLegendItem.on('click'), firstLegendItem.nodes()[0], {}, firstLegendItem.datum());
expect(chart.selectAll('path.line').size()).toBe(3);
});
});
describe('with .maxItems(2)', () => {
beforeEach(() => {
chart.legend(new dc.HtmlLegend().container(`#${legendId}`).horizontal(true).maxItems(2));
chart.render();
});
it('should display two items', () => {
expect(legend.select('div.dc-html-legend').selectAll('div.dc-legend-item-horizontal').size()).toBe(2);
});
});
describe('with invalid .maxItems', () => {
beforeEach(() => {
chart.legend(new dc.HtmlLegend().container(`#${legendId}`).horizontal(true).maxItems('foo'));
chart.render();
});
it('should display three items', () => {
expect(legend.select('div.dc-html-legend').selectAll('div.dc-legend-item-horizontal').size()).toBe(3);
});
});
describe('with .legendText()', () => {
beforeEach(() => {
chart.legend(new dc.HtmlLegend().container(`#${legendId}`).legendText((d, i) => {
const _i = i + 1;
return `${_i}. ${d.name}`;
}));
chart.render();
});
it('should label the legend items with the names of their associated stacks', () => {
expect(legendLabel(0, 'vertical').text()).toBe('1. Id Sum');
expect(legendLabel(1, 'vertical').text()).toBe('2. Value Sum');
expect(legendLabel(2, 'vertical').text()).toBe('3. Fixed');
});
});
});
});