Merge #18562: ci: Run unit tests sequential once

fa7af33b4c ci: Run unit tests sequential once (MarcoFalke)
fa68a3e764 appveyor: Enable minimal unit test logging to aid debugging (MarcoFalke)

Pull request description:

  Fixes #16976

Top commit has no ACKs.

Tree-SHA512: 1f1ee8776a67afa8c1c5a16ef170c9975b6a486c087c8eba12e97d23382befd1c2801622ec70ca8e4cd1fbedce1dec46be67677ceaf07f35f1d3f3bead0200f0

.appveyor.yml

@@ -81,7 +81,7 @@ after_build:
 - ps:  clcache -z
 #- 7z a bitcoin-%APPVEYOR_BUILD_VERSION%.zip %APPVEYOR_BUILD_FOLDER%\build_msvc\%platform%\%configuration%\*.exe
 test_script:
-- cmd: src\test_bitcoin.exe -k stdout -e stdout 2> NUL
+- cmd: src\test_bitcoin.exe -l test_suite
 - cmd: src\bench_bitcoin.exe -evals=1 -scaling=0 > NUL
 - ps:  python test\util\bitcoin-util-test.py
 - cmd: python test\util\rpcauth-test.py

ci/test/00_setup_env_native_qt5.sh

@@ -10,6 +10,8 @@ export CONTAINER_NAME=ci_native_qt5
 export PACKAGES="python3-zmq qtbase5-dev qttools5-dev-tools libdbus-1-dev libharfbuzz-dev"
 export DEP_OPTS="NO_QT=1 NO_UPNP=1 DEBUG=1 ALLOW_HOST_PACKAGES=1"
 export TEST_RUNNER_EXTRA="--coverage --extended --exclude feature_dbcrash"  # Run extended tests so that coverage does not fail, but exclude the very slow dbcrash
+export RUN_UNIT_TESTS_SEQUENTIAL="true"
+export RUN_UNIT_TESTS="false"
 export GOAL="install"
 export TEST_PREVIOUS_RELEASES=true
 export BITCOIN_CONFIG="--enable-zmq --with-gui=qt5 --enable-glibc-back-compat --enable-reduce-exports --enable-debug CFLAGS=\"-g0 -O2 -funsigned-char\" CXXFLAGS=\"-g0 -O2 -funsigned-char\""

ci/test/06_script_b.sh

@@ -21,13 +21,20 @@ if [ -n "$USE_VALGRIND" ]; then
   END_FOLD
 fi
 
+bash -c "${CI_WAIT}" &  # Print dots in case the tests take a long time to run
+
 if [ "$RUN_UNIT_TESTS" = "true" ]; then
   BEGIN_FOLD unit-tests
-  bash -c "${CI_WAIT}" &  # Print dots in case the unit tests take a long time to run
   DOCKER_EXEC LD_LIBRARY_PATH=$DEPENDS_DIR/$HOST/lib make $MAKEJOBS check VERBOSE=1
   END_FOLD
 fi
 
+if [ "$RUN_UNIT_TESTS_SEQUENTIAL" = "true" ]; then
+  BEGIN_FOLD unit-tests-seq
+  DOCKER_EXEC LD_LIBRARY_PATH=$DEPENDS_DIR/$HOST/lib "${BASE_ROOT_DIR}/build/bitcoin-*/src/test/test_bitcoin" --catch_system_errors=no -l test_suite
+  END_FOLD
+fi
+
 if [ "$RUN_FUNCTIONAL_TESTS" = "true" ]; then
   BEGIN_FOLD functional-tests
   DOCKER_EXEC test/functional/test_runner.py --ci $MAKEJOBS --tmpdirprefix "${BASE_SCRATCH_DIR}/test_runner/" --ansi --combinedlogslen=4000 ${TEST_RUNNER_EXTRA} --quiet --failfast