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<a href="https://gitlab.com/dueno">Daiki Ueno</a> created an issue: <a href="https://gitlab.com/gnutls/gnutls/-/issues/1472">#1472</a>
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<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">There are a couple of different ways of writing unit tests for TLS handshake/record protocols in GnuTLS:</p>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Run a TLS server and client in separate processes, communicate through FDs created using <code style='font-size: 0.875rem; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: 4px; margin-top: 0; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>socketpair</code>
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<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Run both a TLS server and client in a single process, using helper macros such as <code style='font-size: 0.875rem; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: 4px; margin-top: 0; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>HANDSHAKE</code>, defined in <a href="https://gitlab.com/gnutls/gnutls/-/blob/1351f3e8e3a0a454613b9d686c948912a3928df6/tests/eagain-common.h">tests/eagain-common.h</a>
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<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">While the former could emulate a more practical scenario, it has a portability problem (the tests written in this way cannot run on Windows, and thus are skipped) as well as makes debugging hard. It would be nice if we could port those tests in the latter style.</p>
<p dir="auto" style="color: #333238; margin: 0;" align="initial">Tests under <a href="https://gitlab.com/gnutls/gnutls/-/tree/master/tests/tls13" style="margin-top: 0;">tests/tls13/</a> are a good candidate for the rewrite. <a href="https://gitlab.com/gnutls/gnutls/-/commit/754098302c07b262d50b9aa70174edc74bc9e547" data-reference-type="commit" data-original="754098302c07b262d50b9aa70174edc74bc9e547" data-link="false" data-link-reference="false" data-project="179611" data-commit="754098302c07b262d50b9aa70174edc74bc9e547" data-container="body" data-placement="top" title="tests: tls13/key_share: rewrite as single process" class="gfm gfm-commit has-tooltip" style='font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; font-variant-ligatures: none; font-size: 95%;'>75409830</a> is an example of such rewrite.</p>
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