149 lines
3.8 KiB
JavaScript
149 lines
3.8 KiB
JavaScript
import { test, moduleForComponent } from 'ember-qunit';
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import d3Format from 'd3-format';
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moduleForComponent('line-chart', 'Unit | Component | line-chart');
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const data = [
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{ foo: 1, bar: 100 },
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{ foo: 2, bar: 200 },
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{ foo: 3, bar: 300 },
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{ foo: 8, bar: 400 },
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{ foo: 4, bar: 500 },
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];
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test('x scale domain is the min and max values in data based on the xProp value', function(assert) {
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const chart = this.subject();
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chart.setProperties({
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xProp: 'foo',
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data,
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});
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let [xDomainLow, xDomainHigh] = chart.get('xScale').domain();
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assert.equal(
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xDomainLow,
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Math.min(...data.mapBy('foo')),
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'Domain lower bound is the lowest foo value'
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);
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assert.equal(
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xDomainHigh,
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Math.max(...data.mapBy('foo')),
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'Domain upper bound is the highest foo value'
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);
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chart.set('data', [...data, { foo: 12, bar: 600 }]);
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[, xDomainHigh] = chart.get('xScale').domain();
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assert.equal(xDomainHigh, 12, 'When the data changes, the xScale is recalculated');
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});
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test('y scale domain uses the max value in the data based off of yProp, but is always zero-based', function(assert) {
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const chart = this.subject();
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chart.setProperties({
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yProp: 'bar',
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data,
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});
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let [yDomainLow, yDomainHigh] = chart.get('yScale').domain();
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assert.equal(yDomainLow, 0, 'Domain lower bound is always 0');
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assert.equal(
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yDomainHigh,
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Math.max(...data.mapBy('bar')),
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'Domain upper bound is the highest bar value'
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);
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chart.set('data', [...data, { foo: 12, bar: 600 }]);
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[, yDomainHigh] = chart.get('yScale').domain();
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assert.equal(yDomainHigh, 600, 'When the data changes, the yScale is recalculated');
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});
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test('the number of yTicks is always odd (to always have a mid-line) and is based off the chart height', function(assert) {
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const chart = this.subject();
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chart.setProperties({
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yProp: 'bar',
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xAxisOffset: 100,
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data,
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});
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assert.equal(chart.get('yTicks').length, 3);
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chart.set('xAxisOffset', 240);
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assert.equal(chart.get('yTicks').length, 5);
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chart.set('xAxisOffset', 241);
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assert.equal(chart.get('yTicks').length, 7);
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});
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test('the values for yTicks are rounded to whole numbers', function(assert) {
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const chart = this.subject();
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chart.setProperties({
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yProp: 'bar',
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xAxisOffset: 100,
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data,
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});
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assert.deepEqual(chart.get('yTicks'), [0, 250, 500]);
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chart.set('xAxisOffset', 240);
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assert.deepEqual(chart.get('yTicks'), [0, 125, 250, 375, 500]);
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chart.set('xAxisOffset', 241);
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assert.deepEqual(chart.get('yTicks'), [0, 83, 167, 250, 333, 417, 500]);
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});
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test('the values for yTicks are fractions when the domain is between 0 and 1', function(assert) {
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const chart = this.subject();
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chart.setProperties({
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yProp: 'bar',
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xAxisOffset: 100,
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data: [
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{ foo: 1, bar: 0.1 },
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{ foo: 2, bar: 0.2 },
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{ foo: 3, bar: 0.3 },
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{ foo: 8, bar: 0.4 },
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{ foo: 4, bar: 0.5 },
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],
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});
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assert.deepEqual(chart.get('yTicks'), [0, 0.25, 0.5]);
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});
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test('activeDatumLabel is the xProp value of the activeDatum formatted with xFormat', function(assert) {
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const chart = this.subject();
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chart.setProperties({
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xProp: 'foo',
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yProp: 'bar',
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data,
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activeDatum: data[1],
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});
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assert.equal(
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chart.get('activeDatumLabel'),
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d3Format.format(',')(data[1].foo),
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'activeDatumLabel correctly formats the correct prop of the correct datum'
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);
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});
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test('activeDatumValue is the yProp value of the activeDatum formatted with yFormat', function(assert) {
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const chart = this.subject();
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chart.setProperties({
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xProp: 'foo',
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yProp: 'bar',
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data,
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activeDatum: data[1],
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});
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assert.equal(
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chart.get('activeDatumValue'),
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d3Format.format(',.2~r')(data[1].bar),
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'activeDatumValue correctly formats the correct prop of the correct datum'
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);
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});
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