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no-useless-escape.ts
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import { SnapshotRuleTester } from "eslint-snapshot-rule-tester"
import rule from "../../../lib/rules/no-useless-escape"
const tester = new SnapshotRuleTester({
languageOptions: {
ecmaVersion: "latest",
sourceType: "module",
},
})
tester.run("no-useless-escape", rule as any, {
valid: [
String.raw`/\\/; /[\\]/`, // Escape backslash \
String.raw`/\^/; /[\^]/`, // Escape ^
String.raw`/\//`, // Escape /
String.raw`/\./`, // Escape .
String.raw`/\$/`, // Escape $
String.raw`/a\*/`, // Escape *
String.raw`/a\+/`, // Escape +
String.raw`/a\?/`, // Escape ?
String.raw`/\[\]/; /[[\]]/`, // Escape brackets []
String.raw`/\{\}/`, // Escape braces []
String.raw`/a\|b/`, // Escape |
String.raw`/\(\)/`, // Escape parenthesis ()
String.raw`/[a\-b]/`, // Escape -
String.raw`/a\b/`, // Word boundary
String.raw`/[\b]/`, // Backspace
String.raw`/a\B/`, // Non-word boundary
String.raw`/\cM/; /[\cM]/`, // Control character
String.raw`/\d/; /[\d]/`, // Digit
String.raw`/\D/; /[\D]/`, // Not digit
String.raw`/\f/; /[\f]/`, // Form-feed
String.raw`/(?<title>\w+), yes \k<title>/`, // Back reference to Named capture group
String.raw`/\n/; /[\n]/`, // Linefeed
String.raw`/\p{ASCII}/u; /[\p{ASCII}]/u`, // Unicode property
String.raw`/\P{ASCII}/u; /[\P{ASCII}]/u`, // Unicode property for NOT
String.raw`/\r/; /[\r]/`, // Carriage return
String.raw`/\s/; /[\s]/`, // Space
String.raw`/\S/; /[\S]/`, // Not space
String.raw`/\t/; /[\t]/`, // Tab
String.raw`/\v/; /[\v]/`, // Vertical tab
String.raw`/\w/; /[\w]/`, // Work
String.raw`/\W/; /[\W]/`, // Not work
String.raw`/\x77/; /[\x77]/`, // Octal escape
String.raw`/\u0041/; /[\u0041]/`, // Unicode escape
String.raw`/\u{41}/u; /[\u{41}]/u`, // Unicode codepoint escape
String.raw`/()\1/`, // Back reference
String.raw`/()()\2/`, // Back reference
String.raw`/()()()\3/`, // Back reference
String.raw`/()()()()\4/`, // Back reference
String.raw`/()()()()()\5/`, // Back reference
String.raw`/()()()()()()\6/`, // Back reference
String.raw`/()()()()()()()\7/`, // Back reference
String.raw`/()()()()()()()()\8/`, // Back reference
String.raw`/()()()()()()()()()\9/`, // Back reference
String.raw`/()()()()()()()()()()\10/`, // Back reference
String.raw`/\0/; /[\0]/`, // NUL character
String.raw`/\1/; /[\1]/`,
String.raw`/\2/; /[\2]/`,
String.raw`/\3/; /[\3]/`,
String.raw`/\4/; /[\4]/`,
String.raw`/\5/; /[\5]/`,
String.raw`/\6/; /[\6]/`,
String.raw`/\7/; /[\7]/`,
//
String.raw`/()\1\8/; /()\1\9/`,
"/[\\^-`]/",
// ES2024
String.raw`/[\q{abc}]/v`,
String.raw`/[\(]/v`,
String.raw`/[\)]/v`,
String.raw`/[\{]/v`,
String.raw`/[\]]/v`,
String.raw`/[\}]/v`,
String.raw`/[\/]/v`,
String.raw`/[\-]/v`,
String.raw`/[\|]/v`,
String.raw`/[\$$]/v`,
String.raw`/[\&&]/v`,
String.raw`/[\!!]/v`,
String.raw`/[\##]/v`,
String.raw`/[\%%]/v`,
String.raw`/[\**]/v`,
String.raw`/[\++]/v`,
String.raw`/[\,,]/v`,
String.raw`/[\..]/v`,
String.raw`/[\::]/v`,
String.raw`/[\;;]/v`,
String.raw`/[\<<]/v`,
String.raw`/[\==]/v`,
String.raw`/[\>>]/v`,
String.raw`/[\??]/v`,
String.raw`/[\@@]/v`,
"/[\\``]/v",
String.raw`/[\~~]/v`,
String.raw`/[^\^^]/v`,
String.raw`/[_\^^]/v`,
String.raw`/[$\$]/v`,
String.raw`/[&\&]/v`,
String.raw`/[!\!]/v`,
String.raw`/[#\#]/v`,
String.raw`/[%\%]/v`,
String.raw`/[*\*]/v`,
String.raw`/[+\+]/v`,
String.raw`/[,\,]/v`,
String.raw`/[.\.]/v`,
String.raw`/[:\:]/v`,
String.raw`/[;\;]/v`,
String.raw`/[<\<]/v`,
String.raw`/[=\=]/v`,
String.raw`/[>\>]/v`,
String.raw`/[?\?]/v`,
String.raw`/[@\@]/v`,
"/[`\\`]/v",
String.raw`/[~\~]/v`,
String.raw`/[^^\^]/v`,
String.raw`/[_^\^]/v`,
String.raw`/[\&&&\&]/v`,
String.raw`/[[\-]\-]/v`,
String.raw`/[\^]/v`,
],
invalid: [
String.raw`/\a/`,
`/\\x7/`,
`/\\u41/`,
`/\\u{[41]}/`,
String.raw`/[ \^ \/ \. \$ \* \+ \? \[ \{ \} \| \( \) \k<title> \B \8 \9]/`,
String.raw`/\p{ASCII}/; /[\p{ASCII}]/; /\P{ASCII}/; /[\P{ASCII}]/`, // Missing u flag
String.raw`/[\q{abc}]/;`, // Missing v flag
// ES2024
String.raw`/[\$]/v`,
String.raw`/[\&\&]/v`,
String.raw`/[\!\!]/v`,
String.raw`/[\#\#]/v`,
String.raw`/[\%\%]/v`,
String.raw`/[\*\*]/v`,
String.raw`/[\+\+]/v`,
String.raw`/[\,\,]/v`,
String.raw`/[\.\.]/v`,
String.raw`/[\:\:]/v`,
String.raw`/[\;\;]/v`,
String.raw`/[\<\<]/v`,
String.raw`/[\=\=]/v`,
String.raw`/[\>\>]/v`,
String.raw`/[\?\?]/v`,
String.raw`/[\@\@]/v`,
"/[\\`\\`]/v",
String.raw`/[\~\~]/v`,
String.raw`/[^\^\^]/v`,
String.raw`/[_\^\^]/v`,
String.raw`/[^\^]/v`,
String.raw`/[\&\&&\&]/v`,
String.raw`/[\p{ASCII}--\.]/v`,
String.raw`/[\p{ASCII}&&\.]/v`,
String.raw`/[\.--[.&]]/v`,
String.raw`/[\.&&[.&]]/v`,
String.raw`/[\.--\.--\.]/v`,
String.raw`/[\.&&\.&&\.]/v`,
String.raw`/[[\.&]--[\.&]]/v`,
String.raw`/[[\.&]&&[\.&]]/v`,
],
})