unikernel/duniverse/dune_/test/blackbox-tests/test-cases/cram/git-diff-fail.t

@@ -0,0 +1,24 @@
+We demonstrate the leaking of the display of internal processes when running
+cram tests.
+
+First we make a cram test:
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.7)
+  > EOF
+
+  $ cat > mytest.t << EOF
+  >   $ echo A
+  >   B
+  > EOF
+
+We need to avoid the special treatment of the test when INSIDE_DUNE is set:
+  $ unset INSIDE_DUNE
+
+We do not observe the leaking of the display of internal processes when running
+dune build. Note that we scrub the actual reported error due to the diff tool
+being bogus.
+  $ bash -c 'set -o pipefail; dune build --always-show-command-line --root=. --diff-command="exit 1; echo" --display=short @runtest 2>&1 | grep -v "(cd"' 
+  File "mytest.t", line 1, characters 0-0:
+  Command exited with code 1.
+  [1]