[SMALLFIX]Change the AllocatorFactory.java using "static"

pr-link: #9075
change-id: cid-2c795e884707bd169ce53ebd9bf9e35e5a5d499d

core/server/worker/src/test/java/alluxio/worker/block/allocator/AllocatorFactoryTest.java

@@ -11,13 +11,14 @@
 
 package alluxio.worker.block.allocator;
 
+import static org.junit.Assert.assertTrue;
+
 import alluxio.conf.ServerConfiguration;
 import alluxio.conf.PropertyKey;
 import alluxio.worker.block.BlockMetadataManagerView;
 import alluxio.worker.block.TieredBlockStoreTestUtils;
 
 import org.junit.After;
-import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
@@ -56,7 +57,7 @@ public void after() {
   public void createGreedyAllocator() {
     ServerConfiguration.set(PropertyKey.WORKER_ALLOCATOR_CLASS, GreedyAllocator.class.getName());
     Allocator allocator = Allocator.Factory.create(mManagerView);
-    Assert.assertTrue(allocator instanceof GreedyAllocator);
+    assertTrue(allocator instanceof GreedyAllocator);
   }
 
   /**
@@ -67,7 +68,7 @@ public void createGreedyAllocator() {
   public void createMaxFreeAllocator() {
     ServerConfiguration.set(PropertyKey.WORKER_ALLOCATOR_CLASS, MaxFreeAllocator.class.getName());
     Allocator allocator = Allocator.Factory.create(mManagerView);
-    Assert.assertTrue(allocator instanceof MaxFreeAllocator);
+    assertTrue(allocator instanceof MaxFreeAllocator);
   }
 
   /**
@@ -79,7 +80,7 @@ public void createRoundRobinAllocator() {
     ServerConfiguration.set(PropertyKey.WORKER_ALLOCATOR_CLASS,
         RoundRobinAllocator.class.getName());
     Allocator allocator = Allocator.Factory.create(mManagerView);
-    Assert.assertTrue(allocator instanceof RoundRobinAllocator);
+    assertTrue(allocator instanceof RoundRobinAllocator);
   }
 
   /**
@@ -91,6 +92,6 @@ public void createDefaultAllocator() {
     // Create a new instance of Alluxio configuration with original properties to test the default
     // behavior of create.
     Allocator allocator = Allocator.Factory.create(mManagerView);
-    Assert.assertTrue(allocator instanceof MaxFreeAllocator);
+    assertTrue(allocator instanceof MaxFreeAllocator);
   }
 }