test: add test for missing dynamic instantiate hook

PR-URL: https://github.com/nodejs/node/pull/21506
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>

test/es-module/test-esm-loader-missing-dynamic-instantiate-hook.mjs

@@ -0,0 +1,14 @@
+// Flags: --experimental-modules --loader ./test/fixtures/es-module-loaders/missing-dynamic-instantiate-hook.mjs
+
+import {
+  crashOnUnhandledRejection,
+  expectsError
+} from '../common';
+
+crashOnUnhandledRejection();
+
+import('test').catch(expectsError({
+  code: 'ERR_MISSING_DYNAMIC_INSTANTIATE_HOOK',
+  message: 'The ES Module loader may not return a format of \'dynamic\' ' +
+    'when no dynamicInstantiate function was provided'
+}));

test/fixtures/es-module-loaders/missing-dynamic-instantiate-hook.mjs

@@ -0,0 +1,6 @@
+export function resolve(specifier, parentModule, defaultResolver) {
+  if (specifier !== 'test') {
+    return defaultResolver(specifier, parentModule);
+  }
+  return { url: 'file://', format: 'dynamic' };
+}