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Bug
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Resolution: Unresolved
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Undefined
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None
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None
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False
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False
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During refactoring and enabling the recommended Playwright ESLint rules, an error with
`expect(headers["x-proxy-test-header"]);` popped up: `Expect must have a corresponding matcher call playwright/valid-expect`
After investigating it, it truly hides an issue with `middleware.spec.ts` test. The expected header is not really present (appears as `undefined`), as you can see from printing the headers like that:
`
console.log("All headers:", headers);
console.log("Target header:", headers["x-proxy-test-header"]);
`
All headers: {
'access-control-allow-credentials': 'true',
'access-control-allow-origin': '***',
'cache-control': 'no-cache',
'content-length': '0',
'content-security-policy': "default-src 'self';base-uri 'self';font-src 'self' https: data:;frame-ancestors 'self';img-src 'self' data:;object-src 'none';script-src 'self' 'unsafe-eval' https://cdn.segment.com;script-src-attr 'none';style-src 'self' https: 'unsafe-inline';upgrade-insecure-requests;connect-src 'self' http: https:",
date: 'Fri, 05 Sep 2025 06:29:26 GMT',
'referrer-policy': 'no-referrer',
'strict-transport-security': 'max-age=15552000; includeSubDomains',
vary: 'Origin',
'x-content-type-options': 'nosniff',
'x-dns-prefetch-control': 'off',
'x-download-options': 'noopen',
'x-frame-options': 'SAMEORIGIN',
'x-permitted-cross-domain-policies': 'none',
'x-xss-protection': '0'
}
Target header: undefined
