Fixed - RSemaphore.addPermits() method doesn't work #3038

redisson/src/main/java/org/redisson/RedissonSemaphore.java

@@ -497,10 +497,12 @@ public class RedissonSemaphore extends RedissonExpirable implements RSemaphore {
         return addPermitsAsync(-permits);
     }
 
+    @Override
     public void addPermits(int permits) {
-        get(reducePermitsAsync(permits));
+        get(addPermitsAsync(permits));
     }
 
+    @Override
     public RFuture<Void> addPermitsAsync(int permits) {
         return commandExecutor.evalWriteAsync(getName(), LongCodec.INSTANCE, RedisCommands.EVAL_VOID,
                 "local value = redis.call('get', KEYS[1]); " +

redisson/src/test/java/org/redisson/RedissonSemaphoreTest.java

@@ -35,6 +35,21 @@ public class RedissonSemaphoreTest extends BaseConcurrentTest {
         assertThat(s.availablePermits()).isEqualTo(10);
     }
 
+    @Test
+    public void testAddPermits() throws InterruptedException {
+        RSemaphore s = redisson.getSemaphore("test");
+        s.trySetPermits(10);
+
+        s.acquire(10);
+        assertThat(s.availablePermits()).isEqualTo(0);
+        s.addPermits(4);
+        assertThat(s.availablePermits()).isEqualTo(4);
+        s.release(10);
+        assertThat(s.availablePermits()).isEqualTo(14);
+        s.acquire(5);
+        assertThat(s.availablePermits()).isEqualTo(9);
+    }
+
     @Test
     public void testReducePermits() throws InterruptedException {
         RSemaphore s = redisson.getSemaphore("test");