fix: Only resolve string $refs (#8)

Author: pytlesk4

src/__tests__/resolver.spec.ts

@@ -160,6 +160,31 @@ describe('resolver', () => {
       expect(resolved.result.hello).toBe('world');
     });
 
+    test('should only resolve valid $refs', async () => {
+      const source = {
+        hello: {
+          $ref: {
+            foo: 'bear',
+          },
+        },
+        word: 'world',
+      };
+
+      const resolver = new Resolver();
+      let resolved = await resolver.resolve(source);
+      expect(resolved.result).toEqual(source);
+
+      // @ts-ignore
+      source.hello.$ref = true;
+      resolved = await resolver.resolve(source);
+      expect(resolved.result).toEqual(source);
+
+      // @ts-ignore
+      source.hello.$ref = 1;
+      resolved = await resolver.resolve(source);
+      expect(resolved.result).toEqual(source);
+    });
+
     test('should support not resolving pointers', async () => {
       const source = {
         hello: {

src/runner.ts

@@ -14,10 +14,7 @@ const memoize = require('fast-memoize');
 let resolveRunnerCount = 0;
 
 export const defaultGetRef = (key: string, val: any) => {
-  if (val && typeof val === 'object' && val.$ref) {
-    return val.$ref;
-  }
-
+  if (val && typeof val === 'object' && typeof val.$ref === 'string') return val.$ref;
   return;
 };