test(fsevents): make sure sync dir is created

Signed-off-by: Rudi Grinberg <[email protected]>

Author: rgrinberg

test/expect-tests/fsevents/fsevents_tests.ml

@@ -14,9 +14,11 @@ let start_filename = ".dune_fsevents_start"
 let end_filename = ".dune_fsevents_end"
 
 let emit_start dir =
+  ignore (Fpath.mkdir_p dir);
   Io.String_path.write_file (Filename.concat dir start_filename) ""
 
 let emit_end dir =
+  ignore (Fpath.mkdir_p dir);
   Io.String_path.write_file (Filename.concat dir end_filename) ""
 
 let test f =