CI: Build and run the libcheck-based tests.

Author: notroj

.github/workflows/linux.yml

@@ -353,7 +353,7 @@ jobs:
                     cpanminus libtool-bin libapr1-dev libaprutil1-dev
                     liblua5.3-dev libbrotli-dev libcurl4-openssl-dev     
                     libnghttp2-dev libjansson-dev libpcre2-dev gdb
-                    perl-doc libsasl2-dev ${{ matrix.pkgs }}
+                    perl-doc libsasl2-dev ${{ matrix.pkgs }} check
     - uses: actions/checkout@v4
     - name: Cache installed libraries
       uses: actions/cache@v4

test/travis_run_linux.sh

@@ -133,6 +133,11 @@ if test -v PHP_FPM; then
     $PHP_FPM --version
 fi
 
+if test -x ./test/httpdunit; then
+    : Running libcheck-based unit tests.
+    prove ./test/httpdunit
+fi
+
 # Try to keep all potential coredumps from all processes
 sudo sysctl -w kernel.core_uses_pid=1 2>/dev/null || true
 # Systemd based systems might process core dumps via systemd-coredump.