/
container.test.ts
executable file
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/
container.test.ts
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import { test } from 'uvu'
import { is, equal, throws, type, match } from 'uvu/assert'
import { Declaration, Root, Rule, AtRule, parse } from '../lib/postcss.js'
let example =
'a { a: 1; b: 2 }' +
'/* a */' +
'@keyframes anim {' +
'/* b */' +
'to { c: 3 }' +
'}' +
'@media all and (min-width: 100) {' +
'em { d: 4 }' +
'@page {' +
'e: 5;' +
'/* c */' +
'}' +
'}'
test('throws error on declaration without value', () => {
throws(() => {
// @ts-expect-error
new Rule().append({ prop: 'color', vlaue: 'black' })
}, /Value field is missed/)
})
test('throws error on unknown node type', () => {
throws(() => {
// @ts-expect-error
new Rule().append({ foo: 'bar' })
}, /Unknown node type/)
})
test('push() adds child without checks', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.push(new Declaration({ prop: 'c', value: '3' }))
is(rule.toString(), 'a { a: 1; b: 2; c: 3 }')
is(rule.nodes.length, 3)
type(rule.last?.raws.before, 'undefined')
})
test('each() iterates', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let indexes: number[] = []
let result = rule.each((decl, i) => {
indexes.push(i)
is(decl, rule.nodes[i])
})
type(result, 'undefined')
equal(indexes, [0, 1])
})
test('each() iterates with prepend', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let size = 0
rule.each(() => {
rule.prepend({ prop: 'color', value: 'aqua' })
size += 1
})
is(size, 2)
})
test('each() iterates with prepend insertBefore', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let size = 0
rule.each(decl => {
if (decl.type === 'decl' && decl.prop === 'a') {
rule.insertBefore(decl, { prop: 'c', value: '3' })
}
size += 1
})
is(size, 2)
})
test('each() iterates with append insertBefore', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let size = 0
rule.each((decl, i) => {
if (decl.type === 'decl' && decl.prop === 'a') {
rule.insertBefore(i + 1, { prop: 'c', value: '3' })
}
size += 1
})
is(size, 3)
})
test('each() iterates with prepend insertAfter', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let size = 0
rule.each((decl, i) => {
rule.insertAfter(i - 1, { prop: 'c', value: '3' })
size += 1
})
is(size, 2)
})
test('each() iterates with append insertAfter', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let size = 0
rule.each((decl, i) => {
if (decl.type === 'decl' && decl.prop === 'a') {
rule.insertAfter(i, { prop: 'c', value: '3' })
}
size += 1
})
is(size, 3)
})
test('each() iterates with remove', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let size = 0
rule.each(() => {
rule.removeChild(0)
size += 1
})
is(size, 2)
})
test('each() breaks iteration', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let indexes: number[] = []
let result = rule.each((decl, i) => {
indexes.push(i)
return false
})
is(result, false)
equal(indexes, [0])
})
test('each() allows to change children', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let props: string[] = []
rule.each(decl => {
if (decl.type === 'decl') {
props.push(decl.prop)
rule.nodes = [rule.last as any, rule.first as any]
}
})
equal(props, ['a', 'a'])
})
test('walk() iterates', () => {
let types: string[] = []
let indexes: number[] = []
let result = parse(example).walk((node, i) => {
types.push(node.type)
indexes.push(i)
})
type(result, 'undefined')
equal(types, [
'rule',
'decl',
'decl',
'comment',
'atrule',
'comment',
'rule',
'decl',
'atrule',
'rule',
'decl',
'atrule',
'decl',
'comment'
])
equal(indexes, [0, 0, 1, 1, 2, 0, 1, 0, 3, 0, 0, 1, 0, 1])
})
test('walk() breaks iteration', () => {
let indexes: number[] = []
let result = parse(example).walk((decl, i) => {
indexes.push(i)
return false
})
is(result, false)
equal(indexes, [0])
})
test('walk() adds CSS position to error stack', () => {
let error = new Error('T')
error.stack = 'Error: T\n at b (b.js:2:4)\n at a (a.js:2:1)'
let root = parse(example, { from: '/c.css' })
let catched: any
try {
root.walk(() => {
throw error
})
} catch (e) {
catched = e
}
is(catched, error)
is(catched.postcssNode.toString(), 'a { a: 1; b: 2 }')
is(
catched.stack.replace(/.:\\/i, '/'),
'Error: T\n at /c.css:1:1\n at b (b.js:2:4)\n at a (a.js:2:1)'
)
})
test('walkDecls() iterates', () => {
let props: string[] = []
let indexes: number[] = []
let result = parse(example).walkDecls((decl, i) => {
props.push(decl.prop)
indexes.push(i)
})
type(result, 'undefined')
equal(props, ['a', 'b', 'c', 'd', 'e'])
equal(indexes, [0, 1, 0, 0, 0])
})
test('walkDecls() iterates with changes', () => {
let size = 0
parse(example).walkDecls((decl, i) => {
decl.parent?.removeChild(i)
size += 1
})
is(size, 5)
})
test('walkDecls() breaks iteration', () => {
let indexes: number[] = []
let result = parse(example).walkDecls((decl, i) => {
indexes.push(i)
return false
})
is(result, false)
equal(indexes, [0])
})
test('walkDecls() filters declarations by property name', () => {
let css = parse('@page{a{one:1}}b{one:1;two:2}')
let size = 0
css.walkDecls('one', decl => {
is(decl.prop, 'one')
size += 1
})
is(size, 2)
})
test('walkDecls() breaks declarations filter by name', () => {
let css = parse('@page{a{one:1}}b{one:1;two:2}')
let size = 0
css.walkDecls('one', () => {
size += 1
return false
})
is(size, 1)
})
test('walkDecls() filters declarations by property regexp', () => {
let css = parse('@page{a{one:1}}b{one-x:1;two:2}')
let size = 0
css.walkDecls(/one(-x)?/, () => {
size += 1
})
is(size, 2)
})
test('walkDecls() breaks declarations filters by regexp', () => {
let css = parse('@page{a{one:1}}b{one-x:1;two:2}')
let size = 0
css.walkDecls(/one(-x)?/, () => {
size += 1
return false
})
is(size, 1)
})
test('walkComments() iterates', () => {
let texts: string[] = []
let indexes: number[] = []
let result = parse(example).walkComments((comment, i) => {
texts.push(comment.text)
indexes.push(i)
})
type(result, 'undefined')
equal(texts, ['a', 'b', 'c'])
equal(indexes, [1, 0, 1])
})
test('walkComments() iterates with changes', () => {
let size = 0
parse(example).walkComments((comment, i) => {
comment.parent?.removeChild(i)
size += 1
})
is(size, 3)
})
test('walkComments() breaks iteration', () => {
let indexes: number[] = []
let result = parse(example).walkComments((comment, i) => {
indexes.push(i)
return false
})
is(result, false)
equal(indexes, [1])
})
test('walkRules() iterates', () => {
let selectors: string[] = []
let indexes: number[] = []
let result = parse(example).walkRules((rule, i) => {
selectors.push(rule.selector)
indexes.push(i)
})
type(result, 'undefined')
equal(selectors, ['a', 'to', 'em'])
equal(indexes, [0, 1, 0])
})
test('walkRules() iterates with changes', () => {
let size = 0
parse(example).walkRules((rule, i) => {
rule.parent?.removeChild(i)
size += 1
})
is(size, 3)
})
test('walkRules() breaks iteration', () => {
let indexes: number[] = []
let result = parse(example).walkRules((rule, i) => {
indexes.push(i)
return false
})
is(result, false)
equal(indexes, [0])
})
test('walkRules() filters by selector', () => {
let size = 0
parse('a{}b{}a{}').walkRules('a', rule => {
is(rule.selector, 'a')
size += 1
})
is(size, 2)
})
test('walkRules() breaks selector filters', () => {
let size = 0
parse('a{}b{}a{}').walkRules('a', () => {
size += 1
return false
})
is(size, 1)
})
test('walkRules() filters by regexp', () => {
let size = 0
parse('a{}a b{}b a{}').walkRules(/^a/, rule => {
match(rule.selector, /^a/)
size += 1
})
is(size, 2)
})
test('walkRules() breaks selector regexp', () => {
let size = 0
parse('a{}b a{}b a{}').walkRules(/^a/, () => {
size += 1
return false
})
is(size, 1)
})
test('walkAtRules() iterates', () => {
let names: string[] = []
let indexes: number[] = []
let result = parse(example).walkAtRules((atrule, i) => {
names.push(atrule.name)
indexes.push(i)
})
type(result, 'undefined')
equal(names, ['keyframes', 'media', 'page'])
equal(indexes, [2, 3, 1])
})
test('walkAtRules() iterates with changes', () => {
let size = 0
parse(example).walkAtRules((atrule, i) => {
atrule.parent?.removeChild(i)
size += 1
})
is(size, 3)
})
test('walkAtRules() breaks iteration', () => {
let indexes: number[] = []
let result = parse(example).walkAtRules((atrule, i) => {
indexes.push(i)
return false
})
is(result, false)
equal(indexes, [2])
})
test('walkAtRules() filters at-rules by name', () => {
let css = parse('@page{@page 2{}}@media print{@page{}}')
let size = 0
css.walkAtRules('page', atrule => {
is(atrule.name, 'page')
size += 1
})
is(size, 3)
})
test('walkAtRules() breaks name filter', () => {
let size = 0
parse('@page{@page{@page{}}}').walkAtRules('page', () => {
size += 1
return false
})
is(size, 1)
})
test('walkAtRules() filters at-rules by name regexp', () => {
let css = parse('@page{@page 2{}}@media print{@pages{}}')
let size = 0
css.walkAtRules(/page/, () => {
size += 1
})
is(size, 3)
})
test('walkAtRules() breaks regexp filter', () => {
let size = 0
parse('@page{@pages{@page{}}}').walkAtRules(/page/, () => {
size += 1
return false
})
is(size, 1)
})
test('append() appends child', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.append({ prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; b: 2; c: 3 }')
is(rule.last?.raws.before, ' ')
})
test('append() appends multiple children', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.append({ prop: 'c', value: '3' }, { prop: 'd', value: '4' })
is(rule.toString(), 'a { a: 1; b: 2; c: 3; d: 4 }')
is(rule.last?.raws.before, ' ')
})
test('append() has declaration shortcut', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.append({ prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; b: 2; c: 3 }')
})
test('append() has rule shortcut', () => {
let root = new Root()
root.append({ selector: 'a' })
is(root.first?.toString(), 'a {}')
})
test('append() has at-rule shortcut', () => {
let root = new Root()
root.append({ name: 'encoding', params: '"utf-8"' })
is(root.first?.toString(), '@encoding "utf-8"')
})
test('append() has comment shortcut', () => {
let root = new Root()
root.append({ text: 'ok' })
is(root.first?.toString(), '/* ok */')
})
test('append() receives root', () => {
let css = parse('a {}')
css.append(parse('b {}'))
is(css.toString(), 'a {}b {}')
})
test('append() reveives string', () => {
let root = new Root()
root.append('a{}b{}')
let a = root.first as Rule
a.append('color:black')
is(root.toString(), 'a{color:black}b{}')
type(a.first?.source, 'undefined')
})
test('append() receives array', () => {
let a = parse('a{ z-index: 1 }')
let b = parse('b{ width: 1px; height: 2px }')
let aRule = a.first as Rule
let bRule = b.first as Rule
aRule.append(bRule.nodes)
is(a.toString(), 'a{ z-index: 1; width: 1px; height: 2px }')
is(b.toString(), 'b{ }')
})
test('append() move node on insert', () => {
let a = parse('a{}')
let b = parse('b{}')
b.append(a.first as Rule)
let bLast = b.last as Rule
bLast.selector = 'b a'
is(a.toString(), '')
is(b.toString(), 'b{}b a{}')
})
test('prepend() prepends child', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.prepend({ prop: 'c', value: '3' })
is(rule.toString(), 'a { c: 3; a: 1; b: 2 }')
is(rule.first?.raws.before, ' ')
})
test('prepend() prepends multiple children', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.prepend({ prop: 'c', value: '3' }, { prop: 'd', value: '4' })
is(rule.toString(), 'a { c: 3; d: 4; a: 1; b: 2 }')
is(rule.first?.raws.before, ' ')
})
test('prepend() receive hash instead of declaration', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.prepend({ prop: 'c', value: '3' })
is(rule.toString(), 'a { c: 3; a: 1; b: 2 }')
})
test('prepend() receives root', () => {
let css = parse('a {}')
css.prepend(parse('b {}'))
is(css.toString(), 'b {}\na {}')
})
test('prepend() receives string', () => {
let css = parse('a {}')
css.prepend('b {}')
is(css.toString(), 'b {}\na {}')
})
test('prepend() receives array', () => {
let a = parse('a{ z-index: 1 }')
let b = parse('b{ width: 1px; height: 2px }')
let aRule = a.first as Rule
let bRule = b.first as Rule
aRule.prepend(bRule.nodes)
is(a.toString(), 'a{ width: 1px; height: 2px; z-index: 1 }')
})
test('prepend() works on empty container', () => {
let root = parse('')
root.prepend(new Rule({ selector: 'a' }))
is(root.toString(), 'a {}')
})
test('insertBefore() inserts child', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.insertBefore(1, { prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; c: 3; b: 2 }')
is(rule.nodes[1].raws.before, ' ')
})
test('insertBefore() works with nodes too', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.insertBefore(rule.nodes[1], { prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; c: 3; b: 2 }')
})
test('insertBefore() receive hash instead of declaration', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.insertBefore(1, { prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; c: 3; b: 2 }')
})
test('insertBefore() receives array', () => {
let a = parse('a{ color: red; z-index: 1 }')
let b = parse('b{ width: 1; height: 2 }')
let aRule = a.first as Rule
let bRule = b.first as Rule
aRule.insertBefore(1, bRule.nodes)
is(a.toString(), 'a{ color: red; width: 1; height: 2; z-index: 1 }')
})
test('insertBefore() receives pre-existing child node - a', () => {
let a = parse('a{ align-items: start; color: red; z-index: 1 }')
let declA = (a.first as Rule).nodes[0];
let declC = (a.first as Rule).nodes[2];
declC.before(declA);
is(a.toString(), 'a{ color: red; align-items: start; z-index: 1 }')
})
test('insertBefore() receives pre-existing child node - b', () => {
let a = parse('a{ align-items: start; color: red; z-index: 1 }')
let declA = (a.first as Rule).nodes[0];
let declC = (a.first as Rule).nodes[2];
declA.before(declC);
is(a.toString(), 'a{ z-index: 1; align-items: start; color: red }')
})
test('insertAfter() inserts child', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.insertAfter(0, { prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; c: 3; b: 2 }')
is(rule.nodes[1].raws.before, ' ')
})
test('insertAfter() works with nodes too', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let aDecl = rule.first as Declaration
rule.insertAfter(aDecl, { prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; c: 3; b: 2 }')
})
test('insertAfter() receive hash instead of declaration', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.insertAfter(0, { prop: 'c', value: '3' })
is(rule.toString(), 'a { a: 1; c: 3; b: 2 }')
})
test('insertAfter() receives array', () => {
let a = parse('a{ color: red; z-index: 1 }')
let b = parse('b{ width: 1; height: 2 }')
let aRule = a.first as Rule
let bRule = b.first as Rule
aRule.insertAfter(0, bRule.nodes)
is(a.toString(), 'a{ color: red; width: 1; height: 2; z-index: 1 }')
})
test('insertAfter() receives pre-existing child node - a', () => {
let a = parse('a{ align-items: start; color: red; z-index: 1 }')
let declA = (a.first as Rule).nodes[0];
let declC = (a.first as Rule).nodes[2];
declC.after(declA);
is(a.toString(), 'a{ color: red; z-index: 1; align-items: start }')
})
test('insertAfter() receives pre-existing child node - b', () => {
let a = parse('a{ align-items: start; color: red; z-index: 1 }')
let declA = (a.first as Rule).nodes[0];
let declC = (a.first as Rule).nodes[2];
declA.after(declC);
is(a.toString(), 'a{ align-items: start; z-index: 1; color: red }')
})
test('removeChild() removes by index', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.removeChild(1)
is(rule.toString(), 'a { a: 1 }')
})
test('removeChild() removes by node', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let bDecl = rule.last as Declaration
rule.removeChild(bDecl)
is(rule.toString(), 'a { a: 1 }')
})
test('removeChild() cleans parent in removed node', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let aDecl = rule.first as Declaration
rule.removeChild(aDecl)
type(aDecl.parent, 'undefined')
})
test('removeAll() removes all children', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let decl = rule.first as Declaration
rule.removeAll()
type(decl.parent, 'undefined')
is(rule.toString(), 'a { }')
})
test('replaceValues() replaces strings', () => {
let css = parse('a{one:1}b{two:1 2}')
let result = css.replaceValues('1', 'A')
equal(result, css)
is(css.toString(), 'a{one:A}b{two:A 2}')
})
test('replaceValues() replaces regpexp', () => {
let css = parse('a{one:1}b{two:1 2}')
css.replaceValues(/\d/g, i => i + 'A')
is(css.toString(), 'a{one:1A}b{two:1A 2A}')
})
test('replaceValues() filters properties', () => {
let css = parse('a{one:1}b{two:1 2}')
css.replaceValues('1', { props: ['one'] }, 'A')
is(css.toString(), 'a{one:A}b{two:1 2}')
})
test('replaceValues() uses fast check', () => {
let css = parse('a{one:1}b{two:1 2}')
css.replaceValues('1', { fast: '2' }, 'A')
is(css.toString(), 'a{one:1}b{two:A 2}')
})
test('any() return true if all children return true', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
is(
rule.every(i => i.type === 'decl' && /a|b/.test(i.prop)),
true
)
is(
rule.every(i => i.type === 'decl' && /b/.test(i.prop)),
false
)
})
test('some() return true if all children return true', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
is(
rule.some(i => i.type === 'decl' && i.prop === 'b'),
true
)
is(
rule.some(i => i.type === 'decl' && i.prop === 'c'),
false
)
})
test('index() returns child index', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
is(rule.index(rule.nodes[1]), 1)
})
test('index() returns argument if it is number', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
is(rule.index(2), 2)
})
test('first() works for children-less nodes', () => {
let atRule = parse('@charset "UTF-*"').first as AtRule
type(atRule.first, 'undefined')
})
test('last() works for children-less nodes', () => {
let atRule = parse('@charset "UTF-*"').first as AtRule
type(atRule.last, 'undefined')
})
test('returns first child', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let aDecl = rule.first as Declaration
is(aDecl.prop, 'a')
})
test('returns last child', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
let bDecl = rule.last as Declaration
is(bDecl.prop, 'b')
})
test('normalize() does not normalize new children with exists before', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
rule.append({ prop: 'c', value: '3', raws: { before: '\n ' } })
is(rule.toString(), 'a { a: 1; b: 2;\n c: 3 }')
})
test('forces Declaration#value to be string', () => {
let rule = parse('a { a: 1; b: 2 }').first as Rule
// @ts-expect-error
rule.append({ prop: 'c', value: 3 })
let aDecl = rule.first as Declaration
let cDecl = rule.last as Declaration
type(aDecl.value, 'string')
type(cDecl.value, 'string')
})
test('updates parent in overrides.nodes in constructor', () => {
let root = new Root({ nodes: [{ selector: 'a' }] })
let a = root.first as Rule
equal(a.parent, root)
root.append({
selector: 'b',
nodes: [{ prop: 'color', value: 'black' }]
})
let b = root.last as Rule
let color = b.first as Declaration
equal(color.parent, root.last)
})
test('allows to clone nodes', () => {
let root1 = parse('a { color: black; z-index: 1 } b {}')
let root2 = new Root({ nodes: root1.nodes })
is(root1.toString(), 'a { color: black; z-index: 1 } b {}')
is(root2.toString(), 'a { color: black; z-index: 1 } b {}')
})
test('container.nodes can be sorted', () => {
let root = parse('@b; @c; @a;')
let b = root.nodes[0];
root.nodes.sort((x, y) => {
return (x as AtRule).name.localeCompare((y as AtRule).name)
})
// Sorted nodes are reflected in "toString".
is(root.toString(), ' @a;@b; @c;')
// Sorted nodes are reflected in "walk".
let result: string[] = [];
root.walkAtRules((atRule) => {
result.push(atRule.name.trim())
});
is(result.join(' '), 'a b c')
// Sorted nodes have the corect "index".
is(root.index(b), 1)
// Inserting after a sorted node results in the correct order.
b.after('@d;');
is(root.toString(), ' @a;@b;@d; @c;')
})
test.run()