fix: handle OpenAPI 3.1 nullability for mocks (#1381)

Author: arthurfiorette

packages/mock/src/faker/getters/object.ts

@@ -72,6 +72,23 @@ export const getMockObject = ({
     });
   }
 
+  if (Array.isArray(item.type)) {
+    return combineSchemasMock({
+      item: {
+        anyOf: item.type.map((type) => ({ type })),
+        name: item.name,
+      },
+      separator: 'anyOf',
+      mockOptions,
+      operationId,
+      tags,
+      combine,
+      context,
+      imports,
+      existingReferencedProperties,
+    });
+  }
+
   if (item.properties) {
     let value =
       !combine ||

packages/mock/src/faker/getters/scalar.ts

@@ -248,7 +248,13 @@ export const getMockScalar = ({
       };
     }
 
-    case 'object':
+    case 'null':
+      return {
+        value: 'null',
+        imports: [],
+        name: item.name,
+      };
+
     default: {
       return getMockObject({
         item,

tests/configs/mock.config.ts

@@ -104,4 +104,14 @@ export default defineConfig({
       target: '../specifications/petstore.yaml',
     },
   },
+  nullType: {
+    output: {
+      schemas: '../generated/mock/null-type/model',
+      target: '../generated/mock/null-type/endpoints.ts',
+      mock: true,
+    },
+    input: {
+      target: '../specifications/null-type.yaml',
+    },
+  },
 });