feat: added delete record

Author: jeffrey-baker-vg

packages/idempotency/src/persistence/PersistenceLayer.ts

@@ -29,8 +29,19 @@ abstract class PersistenceLayer implements PersistenceLayerInterface {
     this.functionName = this.getEnvVarsService().getLambdaFunctionName() + '.' + functionName;
   }
 
-  public async deleteRecord(): Promise<void> { }
-  
+  public async deleteRecord(data: unknown): Promise<void> { 
+    const idempotencyRecord: IdempotencyRecord = 
+    new IdempotencyRecord(this.getHashedIdempotencyKey(data),
+      IdempotencyRecordStatus.EXPIRED,
+      undefined,
+      undefined,
+      undefined,
+      undefined
+    );
+    
+    this._deleteRecord(idempotencyRecord);
+  }
+
   public async getRecord(data: unknown): Promise<IdempotencyRecord> {
     const idempotencyKey: string = this.getHashedIdempotencyKey(data);
 

packages/idempotency/tests/unit/PersistenceLayer.test.ts

@@ -197,4 +197,32 @@ describe('Class: Persistence Layer', ()=> {
       expect(getRecord).toHaveBeenCalledWith(expectedIdempotencyKey);
     });
   });
+
+  describe('Method: deleteRecord', ()=> {
+    beforeEach(()=> {
+      putRecord.mockClear();
+      (createHash as jest.MockedFunction<typeof createHash>).mockReturnValue(
+        {
+          update: cryptoUpdateMock,
+          digest: cryptoDigestMock.mockReturnValue(mockDigest)
+        } as unknown as Hash
+      );
+    });
+
+    test('When called it deletes the record with the idempotency key for the data passed in', ()=> {
+      const persistenceLayer: PersistenceLayer = new PersistenceLayerTestClass();
+      const data = 'someData';
+      const lambdaFunctionName = 'LambdaName';
+      jest.spyOn(EnvironmentVariablesService.prototype, 'getLambdaFunctionName').mockReturnValue(lambdaFunctionName);
+
+      const functionName = 'functionName';
+      const expectedIdempotencyKey = lambdaFunctionName + '.' + functionName + '#' + mockDigest;
+      persistenceLayer.configure(functionName);
+
+      persistenceLayer.deleteRecord(data);
+      const deletedIdempotencyRecord: IdempotencyRecord = deleteRecord.mock.calls[0][0];
+
+      expect(deletedIdempotencyRecord.idempotencyKey).toEqual(expectedIdempotencyKey);
+    });
+  });
 });