Software: Apache/2.4.41 (Ubuntu). PHP/8.0.30 uname -a: Linux apirnd 5.4.0-204-generic #224-Ubuntu SMP Thu Dec 5 13:38:28 UTC 2024 x86_64 uid=33(www-data) gid=33(www-data) groups=33(www-data) Safe-mode: OFF (not secure) /usr/local/share/.cache/yarn/v6/npm-@lezer-html-1.3.3-integrity/node_modules/@lezer/html/test/ drwxr-xr-x | |
| Viewing file: Select action/file-type: import {parser as baseParser} from "../dist/index.es.js"
import {TreeFragment} from "@lezer/common"
let parser = baseParser.configure({bufferLength: 2})
let r = n => Math.floor(Math.random() * n)
let tags = ["p", "ul", "li", "div", "span", "th", "tr", "body", "head", "title", "dd", "code", "em", "strong"]
function randomDoc(size) {
let doc = ""
if (!r(5)) doc += "<!doctype html>"
let scope = []
for (let i = 0; i < size; i++) {
let sel = r(20)
if (sel < 5) {
let tag = tags[r(tags.length)]
doc += `<${tag}${r(2) ? " a=b" : ""}>`
scope.push(tag)
} else if (sel < 10 && scope.length) {
let name = scope.pop()
doc += `</${r(5) ? name : "div"}>`
} else if (sel == 10) {
doc += `<img>`
} else if (sel == 11) {
doc += "<script>a()</script>"
} else if (sel == 12) {
doc += r(2) ? "&" : "<!--@-->"
} else {
for (let i = r(6) + 1; i >= 0; i--)
doc += String.fromCharCode(97 + r(26))
}
}
while (scope.length) {
let name = scope.pop()
if (r(5)) doc += `</${name}>`
}
return doc
}
function check(doc, [tp, pos, txt], prevAST) {
let change = {fromA: pos, toA: pos, fromB: pos, toB: pos}, newDoc
if (tp == "insert") {
newDoc = doc.slice(0, pos) + txt + doc.slice(pos)
change.toA += txt.length
} else if (tp == "del") {
newDoc = doc.slice(0, pos) + doc.slice(pos + 1)
change.toB++
} else {
newDoc = doc.slice(0, pos) + txt + doc.slice(pos + 1)
change.toA += txt.length
change.toB++
}
let fragments = TreeFragment.applyChanges(TreeFragment.addTree(prevAST || parser.parse(doc)), [change], 2)
let ast = parser.parse(newDoc, fragments)
let orig = parser.parse(newDoc)
if (ast.toString() != orig.toString()) {
throw new Error(`Mismatch:\n ${ast}\nvs\n ${orig}\ndocument: ${
JSON.stringify(doc)}\naction: ${JSON.stringify([tp, pos, ch])}`)
}
return [newDoc, ast]
}
// Call this to just run random tests until a failing one is found.
// Not directly called in the tests because there's a bunch of
// circumstances in which uninteresting deviations in error recovery
// will create differing parses, so results have to be manually
// inspected.
function generate() {
for (let count = 0, size = 2;; size = Math.min(40, size + 1)) {
let doc = randomDoc(size), prev = null
for (let i = 0; i < 2; i++) {
console.log("Attempt", ++count)
let action = [["del", "insert", "replace"][r(3)], r(doc.length - 1), "<>/piabc "[r(9)]]
;([doc, prev] = check(doc, action, prev))
}
}
}
describe("Incremental parsing", () => {
it("doesn't get confused by reused opening tags", () => {
check("<code><code>mgnbni</code></code>", ["del", 29])
})
it("can handle a renamed opening tag after a self-closing", () => {
check("<p>one two three four five six seven<p>eight", ["replace", 37, "a"])
})
it("is okay with nameless elements", () => {
check("<body><code><img></code><>body>", ["replace", 14, ">"])
check("abcde<>fghij<", ["replace", 12, ">"])
})
it("doesn't get confused by an invalid close tag receiving a matching open tag", () => {
check("<div><p>foo</body>", ["insert", 0, "<body>"])
})
})
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