remove nonexistent

.gitignore

@@ -11,3 +11,4 @@ pubspec.lock
 # If you don't generate documentation locally you can remove this line.
 doc/api/
 .dart_tool
+dump.rdb

lib/src/redis_service.dart

@@ -64,6 +64,11 @@ class RedisService extends Service<String, Map<String, dynamic>> {
     await client.writeArrayOfBulk(['DEL', _applyPrefix(id)]);
     var result = await client.writeArrayOfBulk(['EXEC']);
     var str = result.payload[0] as RespBulkString;
-    return json.decode(str.payload);
+
+    if (str.payload == null)
+      throw new AngelHttpException.notFound(
+          message: 'No record found for ID $id');
+    else
+      return json.decode(str.payload);
   }
 }

test/all_test.dart

@@ -1,3 +1,4 @@
+import 'package:angel_http_exception/angel_http_exception.dart';
 import 'package:angel_redis/angel_redis.dart';
 import 'package:resp_client/resp_client.dart';
 import 'package:resp_client/resp_commands.dart';
@@ -47,5 +48,11 @@ main() async {
     var id = 'gelatin${new DateTime.now().millisecondsSinceEpoch}';
     var input = await service.create({'id': id, 'bar': 'baz'});
     expect(await service.remove(id), input);
+    expect(await service.respCommands.exists([id]), 0);
+  });
+
+  test('remove nonexistent', () async {
+    expect(() => service.remove('definitely_does_not_exist'),
+        throwsA(const TypeMatcher<AngelHttpException>()));
   });
 }