fix: do not execute getValues callback of batch when all values are cached

Author: Xiphe

src/cachified.spec.ts

@@ -1192,6 +1192,7 @@ describe('cachified', () => {
 
     expect(value).toEqual('one');
     expect(onValue).not.toHaveBeenCalled();
+    expect(getValues).not.toHaveBeenCalled();
   });
 
   it('does not use faulty cache entries', async () => {

src/createBatch.ts

@@ -54,6 +54,12 @@ export function createBatch<Value, Param>(
     }
     checkSubmission();
     submitted = true;
+
+    if (requests.length === 0) {
+      submission.resolve();
+      return;
+    }
+
     try {
       const results = await Promise.resolve(
         getFreshValues(requests.map(([param]) => param)),