@@ -0,0 +1,1843 @@
+/*%0A * Licensed to the Apache Software Foundation (ASF) under one or more%0A * contributor license agreements.  See the NOTICE file distributed with%0A * this work for additional information regarding copyright ownership.%0A * The ASF licenses this file to You under the Apache License, Version 2.0%0A * (the %22License%22); you may not use this file except in compliance with%0A * the License.  You may obtain a copy of the License at%0A *%0A *     http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0A%0Apackage org.apache.shardingsphere.infra.rule;%0A%0Aimport org.apache.shardingsphere.infra.datanode.DataNode;%0Aimport org.apache.shardingsphere.infra.datanode.DataNodeUtil;%0Aimport org.junit.Test;%0A%0Aimport java.util.Arrays;%0Aimport java.util.LinkedHashMap;%0Aimport java.util.LinkedList;%0Aimport java.util.List;%0Aimport java.util.Map;%0A%0Aimport static org.hamcrest.CoreMatchers.is;%0Aimport static org.junit.Assert.assertThat;%0A%0Apublic final class DataNodeUtilTest %7B%0A    %0A    @Test%0A    public void assertGetDataNodeGroups() %7B%0A        Map%3CString, List%3CDataNode%3E%3E expected = new LinkedHashMap%3C%3E(2, 1);%0A        expected.put(%22ds_0%22, Arrays.asList(new DataNode(%22ds_0.tbl_0%22), new DataNode(%22ds_0.tbl_1%22)));%0A        expected.put(%22ds_1%22, Arrays.asList(new DataNode(%22ds_1.tbl_0%22), new DataNode(%22ds_1.tbl_1%22)));%0A        List%3CDataNode%3E dataNodes = new LinkedList%3C%3E();%0A        expected.values().stream().forEach(dataNodes::addAll);%0A        Map%3CString, List%3CDataNode%3E%3E actual = DataNodeUtil.getDataNodeGroups(dataNodes);%0A        assertThat(actual, is(expected));%0A    %7D%0A%7D%0A

Add test cases for DataNodeUtil (#6624)