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test.js
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test.js
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var concat = require('concat-stream')
var pump = require('pump')
var tape = require('tape')
var inline = require('./')
tape('inlines critical css', function (assert) {
assert.plan(2)
var css = `
.red { color: red }
`
var html = `
<html>
<head></head>
<body class="red">Hello world</body>
</html>
`
var expected = `
<html>
<head><style>.red{color:red;}</style></head>
<body class="red">Hello world</body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('can parse nested selectors', function (assert) {
assert.plan(2)
var css = `
.red > h1 { color: red }
`
var html = `
<html>
<head></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var expected = `
<html>
<head><style>.red>h1{color:red;}</style></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('can parse tag selectors', function (assert) {
assert.plan(2)
var css = `
h1 { color: red }
`
var html = `
<html>
<head></head>
<body><h1>Hello world</h1></body>
</html>
`
var expected = `
<html>
<head><style>h1{color:red;}</style></head>
<body><h1>Hello world</h1></body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('can parse comments', function (assert) {
assert.plan(2)
var css = `
/* foo */
.red > h1 { color: red }
`
var html = `
<html>
<head></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var expected = `
<html>
<head><style>.red>h1{color:red;}</style></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('can parse breakpoints', function (assert) {
assert.plan(2)
var css = `
@media screen {
.red > h1 { color: red }
}
.red > h1 { color: blue }
`
var html = `
<html>
<head></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var expected = `
<html>
<head><style>@media screen{.red>h1{color:red;}}.red>h1{color:blue;}</style></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('excludes empty breakpoints', function (assert) {
assert.plan(2)
var css = `
@media screen {
.noop { color: red }
}
.red > h1 { color: blue }
`
var html = `
<html>
<head></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var expected = `
<html>
<head><style>.red>h1{color:blue;}</style></head>
<body class="red"><h1>Hello world</h1></body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('can parse ids', function (assert) {
assert.plan(2)
var css = `
#red { color: red }
`
var html = `
<html>
<head></head>
<body id="red">Hello world</body>
</html>
`
var expected = `
<html>
<head><style>#red{color:red;}</style></head>
<body id="red">Hello world</body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('ignores extra ids', function (assert) {
assert.plan(2)
var css = `
#red { color: red }
`
var html = `
<html>
<head></head>
<body id="blue red">Hello world</body>
</html>
`
var expected = `
<html>
<head></head>
<body id="blue red">Hello world</body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('can parse * selector', function (assert) {
assert.plan(2)
var css = `
* { box-sizing: border-box; }
`
var html = `
<html>
<head></head>
<body>Hello world</body>
</html>
`
var expected = `
<html>
<head><style>*{box-sizing:border-box;}</style></head>
<body>Hello world</body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})
tape('can parse multiple selectors', function (assert) {
assert.plan(2)
var css = `
a, div, p, body, main { box-sizing: border-box; }
`
var html = `
<html>
<head></head>
<body>
<main>
<p>Hello world</p>
</main>
</body>
</html>
`
var expected = `
<html>
<head><style>a,div,p,body,main{box-sizing:border-box;}</style></head>
<body>
<main>
<p>Hello world</p>
</main>
</body>
</html>
`
var source = inline(css)
var sink = concat({ encoding: 'string' }, function (str) {
assert.equal(str, expected, 'was inlined')
})
pump(source, sink, function (err) {
assert.ifError(err, 'no error pumping')
})
source.end(html)
})