unikernel/duniverse/dune_/test/blackbox-tests/test-cases/mdx-stanza/env-variables.t

@@ -0,0 +1,59 @@
+Dune should know about the fact that mdx reads the MDX_RUN_NON_DETERMINISTIC
+variable. When using the stanza 0.2, it is the mdx driver that reads that
+variable. This is only the case since mdx 2.1.0.
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.0)
+  > (using mdx 0.2)
+  > EOF
+
+  $ cat > dune << EOF
+  > (mdx (files README.md))
+  > EOF
+
+  $ cat > README.md << 'EOF'
+  > ```ocaml
+  > # "a";;
+  > ```
+  > 
+  > ```ocaml non-deterministic
+  > # "b";;
+  > ```
+  > EOF
+
+  $ dune runtest --auto-promote
+  File "README.md", line 1, characters 0-0:
+  Error: Files _build/default/README.md and
+  _build/default/.mdx/README.md.corrected differ.
+  Promoting _build/default/.mdx/README.md.corrected to README.md.
+  [1]
+
+  $ cat README.md
+  ```ocaml
+  # "a";;
+  - : string = "a"
+  ```
+  
+  ```ocaml non-deterministic
+  # "b";;
+  ```
+
+  $ dune runtest
+
+  $ MDX_RUN_NON_DETERMINISTIC=1 dune runtest --auto-promote
+  File "README.md", line 1, characters 0-0:
+  Error: Files _build/default/README.md and
+  _build/default/.mdx/README.md.corrected differ.
+  Promoting _build/default/.mdx/README.md.corrected to README.md.
+  [1]
+
+  $ cat README.md
+  ```ocaml
+  # "a";;
+  - : string = "a"
+  ```
+  
+  ```ocaml non-deterministic
+  # "b";;
+  - : string = "b"
+  ```