HDDS-11410. Refactoring more tests from TestContainerBalancerTask (#7156

)

hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/hdds/scm/container/balancer/ContainerBalancerConfigBuilder.java

@@ -0,0 +1,46 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.hadoop.hdds.scm.container.balancer;
+
+import org.apache.hadoop.hdds.conf.OzoneConfiguration;
+
+class ContainerBalancerConfigBuilder {
+  private static final int DATANODE_COUNT_LIMIT_FOR_SMALL_CLUSTER = 15;
+
+  private final ContainerBalancerConfiguration config;
+
+  ContainerBalancerConfigBuilder(int nodeCount) {
+    this(new OzoneConfiguration(), nodeCount);
+  }
+
+  ContainerBalancerConfigBuilder(OzoneConfiguration ozoneConfig, int nodeCount) {
+    config = ozoneConfig.getObject(ContainerBalancerConfiguration.class);
+    config.setIterations(1);
+    config.setThreshold(10);
+    config.setMaxSizeToMovePerIteration(50 * TestContainerBalancerTask.STORAGE_UNIT);
+    config.setMaxSizeEnteringTarget(50 * TestContainerBalancerTask.STORAGE_UNIT);
+    if (nodeCount < DATANODE_COUNT_LIMIT_FOR_SMALL_CLUSTER) {
+      config.setMaxDatanodesPercentageToInvolvePerIteration(100);
+    }
+  }
+
+  ContainerBalancerConfiguration build() {
+    return config;
+  }
+}

hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/hdds/scm/container/balancer/MockedSCM.java

@@ -142,6 +142,10 @@ public String toString() {
     return startBalancerTask(new ContainerBalancer(scm), config);
   }
 
+  public int getNodeCount() {
+    return cluster.getNodeCount();
+  }
+
   public void enableLegacyReplicationManager() {
     mockedReplicaManager.conf.setEnableLegacy(true);
   }