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Add extensive tests for unitless CSS values
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@marvinhagemeister
marvinhagemeister committed Jul 16, 2020
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Showing 1 changed file with 190 additions and 19 deletions.
209 changes: 190 additions & 19 deletions compat/test/browser/render.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -306,34 +306,205 @@ describe('compat render', () => {
});

it('should append "px" to unitless inline css values', () => {
// These are all CSS Properties that support a single <length> value
// that must have a unit. If we encounter a number we append "px" to it.
// The list is taken from: https://developer.mozilla.org/en-US/docs/Web/CSS/Reference
const unitless = {
'border-block': 2,
'border-block-end-width': 3,
'border-block-start-width': 4,
'border-block-width': 5,
'border-bottom-left-radius': 6,
'border-bottom-right-radius': 7,
'border-bottom-width': 8,
'border-end-end-radius': 9,
'border-end-start-radius': 10,
'border-image-outset': 11,
'border-image-width': 12,
'border-inline': 2,
'border-inline-end': 3,
'border-inline-end-width': 4,
'border-inline-start': 1,
'border-inline-start-width': 123,
'border-inline-width': 123,
'border-left': 123,
'border-left-width': 123,
'border-radius': 123,
'border-right': 123,
'border-right-width': 123,
'border-spacing': 123,
'border-start-end-radius': 123,
'border-start-start-radius': 123,
'border-top': 123,
'border-top-left-radius': 123,
'border-top-right-radius': 123,
'border-top-width': 123,
'border-width': 123,
bottom: 123,
'column-gap': 123,
'column-rule-width': 23,
'column-width': 23,
'flex-basis': 23,
'font-size': 123,
'grid-gap': 23,
'grid-auto-columns': 123,
'grid-auto-rows': 123,
'grid-template-columns': 23,
'grid-template-rows': 23,
height: 123,
'inline-size': 23,
inset: 23,
'inset-block-end': 12,
'inset-block-start': 12,
'inset-inline-end': 213,
'inset-inline-start': 213,
left: 213,
'letter-spacing': 213,
margin: 213,
'margin-block': 213,
'margin-block-end': 213,
'margin-block-start': 213,
'margin-bottom': 213,
'margin-inline': 213,
'margin-inline-end': 213,
'margin-inline-start': 213,
'margin-left': 213,
'margin-right': 213,
'margin-top': 213,
'mask-position': 23,
'mask-size': 23,
'max-block-size': 23,
'max-height': 23,
'max-inline-size': 23,
'max-width': 23,
'min-block-size': 23,
'min-height': 23,
'min-inline-size': 23,
'min-width': 23,
'object-position': 23,
'outline-offset': 23,
'outline-width': 123,
padding: 123,
'padding-block': 123,
'padding-block-end': 123,
'padding-block-start': 123,
'padding-bottom': 123,
'padding-inline': 123,
'padding-inline-end': 123,
'padding-inline-start': 123,
'padding-left': 123,
'padding-right': 123,
'padding-top': 123,
perspective: 123,
right: 123,
'scroll-margin': 123,
'scroll-margin-block': 123,
'scroll-margin-block-start': 123,
'scroll-margin-bottom': 123,
'scroll-margin-inline': 123,
'scroll-margin-inline-end': 123,
'scroll-margin-inline-start': 123,
'scroll-margin-inline-left': 123,
'scroll-margin-inline-right': 123,
'scroll-margin-inline-top': 123,
'scroll-padding': 123,
'scroll-padding-block': 123,
'scroll-padding-block-end': 123,
'scroll-padding-block-start': 123,
'scroll-padding-bottom': 123,
'scroll-padding-inline': 123,
'scroll-padding-inline-end': 123,
'scroll-padding-inline-start': 123,
'scroll-padding-left': 123,
'scroll-padding-right': 123,
'scroll-padding-top': 123,
'shape-margin': 123,
'text-decoration-thickness': 123,
'text-indent': 123,
'text-underline-offset': 123,
top: 123,
'transform-origin': 123,
translate: 123,
width: 123,
'word-spacing': 123
};

// These are all CSS properties that have valid numeric values.
// Our appending logic must not be applied here
const untouched = {
'-webkit-line-clamp': 2,
'animation-iteration-count': 3,
// 'border-image-slice': 12,
'column-count': 2,
columns: 2,
flex: 1,
'flex-grow': 1,
'flex-shrink': 1,
'font-size-adjust': 123,
'font-weight': 12,
'grid-column': 2,
'grid-column-end': 2,
'grid-column-start': 2,
'grid-row': 2,
'grid-row-end': 2,
'grid-row-start': 2,
'line-height': 2,
'mask-border-outset': 2,
'mask-border-slice': 2,
'mask-border-width': 2,
'max-zoom': 2,
'min-zoom': 2,
opacity: 123,
order: 123,
orphans: 2,
'grid-row-gap': 23,
scale: 23,
'tab-size': 23,
widows: 123,
'z-index': 123,
zoom: 123
};

render(
<div
style={{
color: 'rgb(255, 255, 255)',
background: 'rgb(255, 100, 0)',
backgroundPosition: '10px 10px',
'background-size': 'cover',
gridRowStart: 1,
padding: 5,
top: 100,
left: '100%'
...unitless,
...untouched
}}
/>,
scratch
);

let style = scratch.firstChild.style;
expect(style.color).to.equal('rgb(255, 255, 255)');
expect(style.background).to.contain('rgb(255, 100, 0)');
expect(style.backgroundPosition).to.equal('10px 10px');
expect(style.backgroundSize).to.equal('cover');
expect(style.padding).to.equal('5px');
expect(style.top).to.equal('100px');
expect(style.left).to.equal('100%');

// Only check for this in browsers that support css grids
if (typeof scratch.style.grid == 'string') {
expect(style.gridRowStart).to.equal('1');

// Check properties that MUST not be changed
for (const key in unitless) {
// Check if css property is supported
if (
window.CSS &&
typeof window.CSS.supports === 'function' &&
window.CSS.supports(key, unitless[key])
) {
expect(
String(style[key]).endsWith('px'),
`Should append px "${key}: ${unitless[key]}" === "${key}: ${style[key]}"`
).to.equal(true);
}
}

// Check properties that MUST not be changed
for (const key in untouched) {
// Check if css property is supported
if (
window.CSS &&
typeof window.CSS.supports === 'function' &&
window.CSS.supports(key, untouched[key])
) {
expect(
!String(style[key]).endsWith('px'),
`Should be left as is: "${key}: ${untouched[key]}" === "${key}: ${style[key]}"`
).to.equal(true);
}
}
});
});

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