Fix TestShortCircuitCache.

Change-Id: Ie6fcec5dde5e19406e243df3bd88b232a5e49d06

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/shortcircuit/TestShortCircuitCache.java

@@ -21,8 +21,6 @@ import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCK_SIZE_KEY;
 import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_CONTEXT;
 import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DOMAIN_SOCKET_PATH_KEY;
-import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY;
-import static org.hamcrest.CoreMatchers.equalTo;
 
 import java.io.DataOutputStream;
 import java.io.File;
@@ -84,7 +82,6 @@ import org.apache.hadoop.util.DataChecksum;
 import org.apache.hadoop.util.Time;
 import org.junit.Test;
 import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Assumptions;
 import org.mockito.Mockito;
 import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
@@ -412,7 +409,7 @@ public class TestShortCircuitCache {
     conf.setBoolean(DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC, false);
     DFSInputStream.tcpReadsDisabledForTesting = true;
     DomainSocket.disableBindPathValidation();
-    Assumptions.assumeThat(DomainSocket.getLoadingFailureReason(), equalTo(null));
+    Assertions.assertNull(DomainSocket.getLoadingFailureReason());
     return conf;
   }