test(runtest): runtest hints

Signed-off-by: Ali Caglayan <[email protected]>

Author: Alizter

test/blackbox-tests/test-cases/runtest-cmd-hints.t

@@ -0,0 +1,22 @@
+Test the "did you mean" hints for dune runtest command.
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.21)
+  > EOF
+
+  $ mkdir dir.t other_dir
+  $ cat > dir.t/run.t <<EOF
+  >   $ echo "Directory-based cram test"
+  >   Directory-based cram test
+  > EOF
+  $ cat > dir_t
+
+  $ dune test dip.t
+  Error: "dip.t" does not match any known test.
+  Hint: did you mean dir_t or dir.t?
+  [1]
+
+  $ dune test other_dip
+  Error: "other_dip" does not match any known test.
+  Hint: did you mean other_dir?
+  [1]