Ensure that test tests/functional/platforms/02-host-to-platform-upgrade.t

can fail pass the test by passing workflow validation.

Author: wxtim

tests/functional/platforms/02-host-to-platform-upgrade.t

@@ -21,13 +21,15 @@
 #   - Task with a host setting that should match the test platform
 export REQUIRE_PLATFORM='loc:remote'
 . "$(dirname "$0")/test_header"
-set_test_number 6
+set_test_number 7
 
 install_workflow "${TEST_NAME_BASE}" "${TEST_NAME_BASE}"
 
 # Ensure that a mix of syntax will fail.
 run_fail "${TEST_NAME_BASE}-validate-fail" \
-    cylc validate "flow2.cylc"
+    cylc validate "${TEST_SOURCE_DIR}/${TEST_NAME_BASE}/bad"
+# and fail in this specific manner:
+grep_ok "cannot be used with" "${TEST_NAME_BASE}-validate-fail.stderr"
 
 # Ensure that you can validate workflow
 run_ok "${TEST_NAME_BASE}-run" \