Before You File a Bug Report Please Confirm You Have Done The Following...

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I have searched for related issues and found none that matched my issue.
• I have read the FAQ and my problem is not listed.

Relevant Package

rule-tester

Playground Link

No response

Repro Code

new RuleTester().run('rule-name', rule, {
  valid: [
    {
      filename: './../../escaped/cwd/file.ts',
      code: '"whatever"'
    }),
  invalid: []
})

ESLint Config

tsconfig

{
  "compilerOptions": {
    // ...
  }
}

Expected Result

filename should not cause problems since #9906 was fixed (as well as its follow-ons).

Actual Result

running tests causes "No matching configuration found for './../../escaped/cwd/file.ts'."

Additional Info

The .startsWith('..') check in the following doesn't work with non-normalized paths (e.g. ./../foo.ts)

Versions