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detect-nesting.test.js
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detect-nesting.test.js
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import { run, html, css } from './util/run'
it('should warn when we detect nested css', () => {
let config = {
content: [{ raw: html`<div class="nested"></div>` }],
}
let input = css`
@tailwind utilities;
.nested {
.example {
}
}
`
return run(input, config).then((result) => {
expect(result.messages).toHaveLength(1)
expect(result.messages).toMatchObject([
{
type: 'warning',
text: [
'Nested CSS was detected, but CSS nesting has not been configured correctly.',
'Please enable a CSS nesting plugin *before* Tailwind in your configuration.',
'See how here: https://tailwindcss.com/docs/using-with-preprocessors#nesting',
].join('\n'),
},
])
})
})
it('should warn when we detect namespaced @tailwind at rules', () => {
let config = {
content: [{ raw: html`<div class="text-center"></div>` }],
}
let input = css`
.namespace {
@tailwind utilities;
}
`
return run(input, config).then((result) => {
expect(result.messages).toHaveLength(1)
expect(result.messages).toMatchObject([
{
type: 'warning',
text: [
'Nested @tailwind rules were detected, but are not supported.',
"Consider using a prefix to scope Tailwind's classes: https://tailwindcss.com/docs/configuration#prefix",
'Alternatively, use the important selector strategy: https://tailwindcss.com/docs/configuration#selector-strategy',
].join('\n'),
},
])
})
})
it('should not warn when nesting a single rule inside a media query', () => {
let config = {
content: [{ raw: html`<div class="nested"></div>` }],
}
let input = css`
@tailwind utilities;
@media (min-width: 768px) {
.nested {
}
}
`
return run(input, config).then((result) => {
expect(result.messages).toHaveLength(0)
expect(result.messages).toEqual([])
})
})
it('should only warn for the first detected nesting ', () => {
let config = {
content: [{ raw: html`<div class="nested other"></div>` }],
}
let input = css`
@tailwind utilities;
.nested {
.example {
}
.other {
}
}
.other {
.example {
}
}
`
return run(input, config).then((result) => {
expect(result.messages).toHaveLength(1)
})
})