feat(redis_client): add UNLINK and JSON.MERGE (#1280)

packages/redis_client/lib/src/redis_client.dart

@@ -187,6 +187,11 @@ class RedisClient {
   /// https://redis.io/commands/del
   Future<void> delete({required String key}) => execute(['DEL', key]);
 
+  /// Unlinks the specified key.
+  /// Equivalent to the `UNLINK` command.
+  /// https://redis.io/commands/unlink
+  Future<void> unlink({required String key}) => execute(['UNLINK', key]);
+
   /// Send a command to the Redis server.
   Future<dynamic> execute(List<Object?> command) async {
     return _runWithRetry(
@@ -402,6 +407,16 @@ class RedisJson {
   Future<void> delete({required String key}) {
     return _client.execute(['JSON.DEL', key, r'$']);
   }
+
+  /// Merges the value of a key with the specified value.
+  /// Equivalent to the `JSON.MERGE` command.
+  /// https://redis.io/commands/json.merge
+  Future<void> merge({
+    required String key,
+    required Map<String, dynamic> value,
+  }) {
+    return _client.execute(['JSON.MERGE', key, r'$', json.encode(value)]);
+  }
 }
 
 extension on RedisSocketOptions {

packages/redis_client/test/src/redis_client_test.dart

@@ -186,8 +186,14 @@ void main() {
         await expectLater(client.get(key: key), completion(isNull));
         await expectLater(client.set(key: key, value: value), completes);
         await expectLater(client.get(key: key), completion(equals(value)));
+
         await expectLater(client.delete(key: key), completes);
         await expectLater(client.get(key: key), completion(isNull));
+
+        await expectLater(client.set(key: key, value: value), completes);
+        await expectLater(client.get(key: key), completion(equals(value)));
+        await expectLater(client.unlink(key: key), completes);
+        await expectLater(client.get(key: key), completion(isNull));
       });
 
       test(
@@ -226,12 +232,23 @@ void main() {
             'nested': {'bar': 42},
             'array': [1, 2, 3],
           };
+          const other = {
+            'bar': 'baz',
+          };
           await expectLater(client.json.get(key: key), completion(isNull));
           await expectLater(client.json.set(key: key, value: value), completes);
           await expectLater(
             client.json.get(key: key),
             completion(equals(value)),
           );
+          await expectLater(
+            client.json.merge(key: key, value: other),
+            completes,
+          );
+          await expectLater(
+            client.json.get(key: key),
+            completion(equals({...value, ...other})),
+          );
           await expectLater(client.json.delete(key: key), completes);
           await expectLater(client.json.get(key: key), completion(isNull));
         });