Ignoring MongoClient.isLocked test for sharded clusters.

  JAVA-1886

Author: jyemin

Diff for: driver/src/test/functional/com/mongodb/MongoMethodsTest.java

@@ -20,10 +20,13 @@
 
 import java.net.UnknownHostException;
 
+import static com.mongodb.ClusterFixture.clusterIsType;
+import static com.mongodb.connection.ClusterType.SHARDED;
 import static org.hamcrest.CoreMatchers.hasItems;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeFalse;
 
 public class MongoMethodsTest extends DatabaseTestCase {
     @Test
@@ -42,6 +45,8 @@ public void shouldGetDatabaseNames() throws UnknownHostException {
 
     @Test
     public void shouldLockAndUnlock() {
+        assumeFalse(clusterIsType(SHARDED));
+
         assertFalse(getClient().isLocked());
 
         getClient().fsyncAndLock();