add test with sortkey fields

Author: sundersc

packages/appsync-modelgen-plugin/src/__tests__/utils/process-index.test.ts

@@ -194,6 +194,72 @@ describe('processIndex', () => {
     ]);
   });
 
+  it('should generate a default name to @index directive with sortkeys', () => {
+    const model: CodeGenModel = {
+      directives: [
+        {
+          name: 'model',
+          arguments: {},
+        },
+      ],
+      name: 'testModel',
+      type: 'model',
+      fields: [
+        {
+          type: 'field',
+          isList: false,
+          isNullable: true,
+          name: 'connectionField',
+          directives: [
+            {
+              name: 'index',
+              arguments: {
+                sortKeyFields: ['sortField'],
+              },
+            },
+          ],
+        },
+        {
+          type: 'field',
+          isList: false,
+          isNullable: true,
+          name: 'anotherConnection',
+          directives: [
+            {
+              name: 'index',
+              arguments: {
+                sortKeyFields: ['sortField1', 'sortField2'],
+              },
+            },
+          ],
+        },
+      ],
+    };
+    processIndex(model);
+    expect(model.directives).toEqual([
+      {
+        name: 'model',
+        arguments: {},
+      },
+      {
+        name: 'key',
+        arguments: {
+          name: 'testModelsByConnectionFieldAndSortField',
+          fields: ['connectionField', 'sortField'],
+          queryField: undefined, 
+        },
+      },
+      {
+        name: 'key',
+        arguments: {
+          name: 'testModelsByAnotherConnectionAndSortField1AndSortField2',
+          fields: ['anotherConnection', 'sortField1', 'sortField2'],
+          queryField: undefined,
+        },
+      },
+    ]);
+  });
+
   it('does nothing if no @index directives in model', () => {
     const model: CodeGenModel = {
       directives: [

packages/appsync-modelgen-plugin/src/utils/process-index.ts

@@ -35,8 +35,8 @@ export const processIndex = (model: CodeGenModel) => {
  * Accepts a model and field name, and potentially empty list of sortKeyFields to generate a unique index name.
  * e.g. modelName = Employee, fieldName = manager, sortKeyFields = [level]
  * will generate a name like employeeByManagerAndLevel.
- * 
- * This naming logic is used to generate a default index name for @index directives that don't have a name argument.
+ * (This naming logic is used to generate a default index name for @index directives that don't have a name argument).
+ * Refer https://github.com/aws-amplify/amplify-category-api/blob/main/packages/amplify-graphql-index-transformer/src/utils.ts
  */
 export const generateDefaultIndexName = (modelName: string, fieldNames: string[]): string => {
   return `${toLower(pluralize(modelName))}By${fieldNames.map(toUpper).join('And')}`;