Fixed - RMapCache.remainTimeToLive method returns negative remain time. #2272

redisson/src/main/java/org/redisson/RedissonMapCache.java

@@ -1012,7 +1012,7 @@ public class RedissonMapCache<K, V> extends RedissonMap<K, V> implements RMapCac
                             + "return -1; "
                         + "end;"
                         + "if expireDate > tonumber(ARGV[1]) then "
-                            + "return ARGV[1] - expireDate; "
+                            + "return expireDate - ARGV[1]; "
                         + "else "
                             + "return -2; "
                         + "end; "

redisson/src/test/java/org/redisson/RedissonMapCacheTest.java

@@ -97,7 +97,7 @@ public class RedissonMapCacheTest extends BaseMapTest {
     public void testRemainTimeToLive() {
         RMapCache<String, String> map = redisson.getMapCache("test");
         map.put("1", "2", 2, TimeUnit.SECONDS);
-        assertThat(map.remainTimeToLive("1")).isLessThan(1900);
+        assertThat(map.remainTimeToLive("1")).isBetween(1900L, 2000L);
         map.put("3", "4");
         assertThat(map.remainTimeToLive("3")).isEqualTo(-1);
         assertThat(map.remainTimeToLive("0")).isEqualTo(-2);