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test(client): reject oversized DNS prefetch metadata - #1335
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Problem
The client response metadata tests covered valid, malformed, duplicate, and absent
X-DNS-Prefetch-Controlheaders, but did not verify the documented 64 KiB value bound at the client API boundary.Change
Add a focused client regression test that constructs an oversized header using
MAX_X_DNS_PREFETCH_CONTROL_VALUE_BYTES + 1and asserts the response accessor returns an error.Validation
cargo fmt --all -- --checkgit diff --checkcargo test -p rttp_client --test test_response x_dns_prefetch_control(4 passed)