test: run workerd tests with and without nodejs_compat

tap/.workerd.sh

@@ -14,7 +14,9 @@ echo "Using workerd $WORKERD_VERSION, compatibility date $COMPATIBILITY_DATE"
   --outfile=tap/run-workerd.js \
   tap/run-workerd.ts
 
-cat <<EOT > $(pwd)/tap/.workerd.capnp
+generate_capnp() {
+  local compatibility_flags=$1
+  cat <<EOT > $(pwd)/tap/.workerd.capnp
 using Workerd = import "/workerd/workerd.capnp";
 
 const config :Workerd.Config = (
@@ -28,7 +30,30 @@ const tapWorker :Workerd.Worker = (
     (name = "worker", esModule = embed "run-workerd.js")
   ],
   compatibilityDate = "$COMPATIBILITY_DATE",
+  compatibilityFlags = $compatibility_flags
 );
 EOT
+}
 
-workerd test --verbose $(pwd)/tap/.workerd.capnp
+run_test() {
+  local compatibility_flags=$1
+  generate_capnp "$compatibility_flags"
+  workerd test --verbose $(pwd)/tap/.workerd.capnp
+  return $?
+}
+
+run_test "[]"
+NO_COMPAT=$?
+
+run_test '["nodejs_compat"]'
+COMPAT=$?
+
+echo ""
+echo "Workerd without nodejs_compat"
+test $NO_COMPAT -eq 0 && echo "  passed" || echo "  failed"
+
+echo ""
+echo "Workerd with nodejs_compat"
+test $COMPAT -eq 0 && echo "  passed" || echo "  failed"
+
+test $NO_COMPAT -eq 0 && test $COMPAT -eq 0