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
  // 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 com.cloud.usage;
  
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import junit.framework.TestCase;
  
  import org.junit.Test;
  import org.mockito.Mockito;
  
  public class UsageSanityCheckerTest extends TestCase {
  
      @Test
      public void testCheckItemCountByPstmt() throws SQLException {
          // Prepare
          // Mock dependencies to exclude from the test
          String sqlTemplate1 = "SELECT * FROM mytable1";
          String sqlTemplate2 = "SELECT * FROM mytable2";
  
          Connection conn = Mockito.mock(Connection.class);
          PreparedStatement pstmt = Mockito.mock(PreparedStatement.class);
          ResultSet rs = Mockito.mock(ResultSet.class);
  
          Mockito.when(conn.prepareStatement(sqlTemplate1)).thenReturn(pstmt);
          Mockito.when(conn.prepareStatement(sqlTemplate2)).thenReturn(pstmt);
          Mockito.when(pstmt.executeQuery()).thenReturn(rs, rs);
  
          // First if: true -> 8
          // Second loop: true -> 16
          Mockito.when(rs.next()).thenReturn(true, true);
          Mockito.when(rs.getInt(1)).thenReturn(8, 8, 16, 16);
  
          // Prepare class under test
          UsageSanityChecker checker = new UsageSanityChecker();
          checker.conn = conn;
          checker.reset();
          checker.addCheckCase(sqlTemplate1, "item1");
          checker.addCheckCase(sqlTemplate2, "item2");
  
          // Execute
          checker.checkItemCountByPstmt();
  
          // Verify
          Pattern pattern = Pattern.compile(".*8.*item1.*\n.*16.*item2.*");
          Matcher matcher = pattern.matcher(checker.errors);
          assertTrue("Didn't create complete errors. It should create 2 errors: 8 item1 and 16 item2", matcher.find());
      }
  }
  