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test: validate the canvas style too

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Guy Baron
2022-12-15 14:04:48 -05:00
parent 7525e89967
commit bf4fdcff86
1 changed files with 5 additions and 4 deletions
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9
test/specs/helpers.dom.tests.js
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@@ -254,7 +254,7 @@ describe('DOM helpers tests', function() {
expect(canvas.style.width).toBe('400px');
});
it ('retinaScale should not change chart size', function() {
it ('should handle devicePixelRatio correctly', function() {
const chartWidth = 800;
const chartHeight = 400;
let devicePixelRatio = 0.8999999761581421; // 1.7999999523162842;
@@ -262,19 +262,20 @@ describe('DOM helpers tests', function() {
canvas: {
width: chartWidth,
height: chartHeight,
style: `width: ${chartWidth}px; height: ${chartHeight}px;`
}
});
helpers.retinaScale(chart, devicePixelRatio, false);
helpers.retinaScale(chart, devicePixelRatio, true);
var canvas = chart.canvas;
expect(canvas.width).toBe(Math.floor(chartWidth * devicePixelRatio));
expect(canvas.height).toBe(Math.floor(chartHeight * devicePixelRatio));
expect(chart.width).toBe(chartWidth);
expect(chart.height).toBe(chartHeight);
expect(canvas.style.width).toBe(`${chartWidth}px`);
expect(canvas.style.height).toBe(`${chartHeight}px`);
});
describe('getRelativePosition', function() {