test: http2 ERR_INVALID_ARG_TYPE tests
This PR adds unit tests for testing ERR_INVALID_ARG_TYPE errors in priority() and rstStream()
Refs: #14985 (closed)
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
test, http2