package org.junit.tests.experimental.rules;
   
   import static java.util.Arrays.asList;
   import static org.junit.Assert.assertEquals;
   import static org.junit.Assert.assertTrue;
   import static org.junit.experimental.results.PrintableResult.testResult;
   import static org.junit.rules.RuleChain.outerRule;
   
   import java.util.ArrayList;
  import java.util.List;
  
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.RuleChain;
  import org.junit.rules.TestWatcher;
  import org.junit.runner.Description;
  
  public class RuleChainTest {
      private static final List<String> LOG = new ArrayList<String>();
  
      private static class LoggingRule extends TestWatcher {
          private final String label;
  
          public LoggingRule(String label) {
              this.label = label;
          }
  
          @Override
          protected void starting(Description description) {
              LOG.add("starting " + label);
          }
  
          @Override
          protected void finished(Description description) {
              LOG.add("finished " + label);
          }
      }
  
      public static class UseRuleChain {
          @Rule
          public final RuleChain chain = outerRule(new LoggingRule("outer rule"))
                  .around(new LoggingRule("middle rule")).around(
                          new LoggingRule("inner rule"));
  
          @Test
          public void example() {
              assertTrue(true);
          }
      }
  
      @Test
      public void executeRulesInCorrectOrder() throws Exception {
          testResult(UseRuleChain.class);
          List<String> expectedLog = asList("starting outer rule",
                  "starting middle rule", "starting inner rule",
                  "finished inner rule", "finished middle rule",
                  "finished outer rule");
          assertEquals(expectedLog, LOG);
      }
  }