refactor: move indexable test files to separate folder

test/schema.spec.ts

@@ -230,7 +230,7 @@ export class SchemaSpec {
           fail(`'${thingName}'#'${property.name}' union type '${nestedType.type}' is not handled by this test!`);
         }
       }
-    }
+    };
 
     for (const thingName of SchemaSpec.thingNames) {
       const thingReflection = SchemaSpec.objects[`${thingName}`];
@@ -318,7 +318,10 @@ export class SchemaSpec {
 
   @test
   async 'validate against test files'() {
-    const errorsPerFile = await validateFiles(resolve('lib', 'schema'), resolve('test', 'resources'));
+    const errorsPerFile = {
+      ...await validateFiles(resolve('lib', 'schema'), resolve('test', 'resources')),
+      ...await validateFiles(resolve('lib', 'schema'), resolve('test', 'resources', 'indexable')),
+    };
 
     let unexpected = false;
     Object.keys(errorsPerFile).forEach((file) => {