unikernel/duniverse/dune_/test/blackbox-tests/test-cases/cram/subprocess.t

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+Testing the termination of subprocesses in cram tests. We first create a dune
+project with a single cram test.
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.19)
+  > EOF
+
+We create a file for tracking the PID of a subprocess.
+
+  $ pidFile="$PWD/pid.txt"
+
+We create a cram test that spawns a subprocess and records its PID in the file
+we gave before.
+
+  $ cat > mycram.t <<EOF
+  >   $ sleep 5 &
+  >   $ echo \$! > $pidFile
+  > EOF
+
+We can now run this test, which will record its PID in the file.
+
+  $ dune runtest mycram.t
+
+The test finished successfully, now we make sure that the PID was correctly
+terminated.
+
+  $ [ -s $pidFile ] && echo pid file created
+  pid file created
+  $ ps -p $(cat $pidFile) > /dev/null || echo "Process terminated"
+  Process terminated