content: /*
   *  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.causeway.commons.internal.debug.xray;
  
  import java.util.List;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import org.apache.causeway.commons.internal.debug.xray._CallStackMerger.IntTreeVisitor;
  
  class CallStackMergerTest {
  
      private List<int[]> executionLanes;
  
      @BeforeEach
      void setUp() throws Exception {
          executionLanes = List.of(
                  new int[] {1, 2, 3, 4, 5, 6},
                  new int[] {1, 2, 3, 7, 8, 6, 9},
                  new int[] {1, 2, 3, 4, 8}
                  );
      }
  
      /**
       * expected ...<pre>
  -1
  └── 1
      └── 2
          └── 3
              ├── 4
              │   ├── 5
              │   │   └── 6
              │   └── 8
              └── 7
                  └── 8
                      └── 6
                          └── 9
      </pre>
       */
      @Test
      void test() {
          var root = _CallStackMerger.merge(executionLanes);
          //System.err.printf("%s%n", root);
  
          var sb = new StringBuilder();
          root.visitDepthFirst(new IntTreeVisitor() {
              @Override
              public void accept(final int level, final int value) {
                  sb.append(level).append(":").append(value).append(",");
              }
          });
          assertEquals("0:-1,1:1,2:2,3:3,4:4,5:5,6:6,5:8,4:7,5:8,6:6,7:9,", sb.toString());
      }
  
  }
  