content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  
  import alluxio.conf.Configuration;
  import alluxio.conf.InstancedConfiguration;
  import alluxio.conf.PropertyKey;
  
  import com.google.common.collect.ImmutableMap;
  import org.junit.Test;
  import org.junit.runners.model.Statement;
  
  /**
   * Unit tests for {@link ConfigurationRule}.
   */
  public final class ConfigurationRuleTest {
  
    @Test
    public void changeConfiguration() throws Throwable {
      InstancedConfiguration conf = Configuration.copyGlobal();
      Statement statement = new Statement() {
        @Override
        public void evaluate() throws Throwable {
          assertEquals("testValue", conf.get(PropertyKey.MASTER_HOSTNAME));
        }
      };
      new ConfigurationRule(ImmutableMap.of(PropertyKey.MASTER_HOSTNAME, "testValue"), conf)
          .apply(statement, null).evaluate();
    }
  
    @Test
    public void changeConfigurationForDefaultNullValue() throws Throwable {
      InstancedConfiguration conf = Configuration.copyGlobal();
  
      Statement statement = new Statement() {
        @Override
        public void evaluate() throws Throwable {
          assertEquals("testValue", conf.get(PropertyKey.SECURITY_LOGIN_USERNAME));
        }
      };
      assertFalse(conf.isSet(PropertyKey.SECURITY_LOGIN_USERNAME));
      new ConfigurationRule(ImmutableMap.of(PropertyKey.SECURITY_LOGIN_USERNAME, "testValue"), conf)
          .apply(statement, null).evaluate();
      assertFalse(conf.isSet(PropertyKey.SECURITY_LOGIN_USERNAME));
    }
  
    @Test
    public void setConfiguration() throws Throwable {
      InstancedConfiguration conf = Configuration.copyGlobal();
  
      ConfigurationRule configurationRule = new ConfigurationRule(
          ImmutableMap.of(PropertyKey.MASTER_HOSTNAME, "testHostName1"),
          conf
      );
  
      // before rule is in effect, none of the property is set
      assertFalse(conf.isSet(PropertyKey.MASTER_HOSTNAME));
      assertFalse(conf.isSet(PropertyKey.SECURITY_LOGIN_USERNAME));
  
      Statement statementWithSet = new Statement() {
        @Override
        public void evaluate() throws Throwable {
          // calling set overrides the initial value of configuration rule
          configurationRule
              .set(PropertyKey.MASTER_HOSTNAME, "testHostName2")
              .set(PropertyKey.SECURITY_LOGIN_USERNAME, "testUserName");
          assertEquals("testHostName2", conf.get(PropertyKey.MASTER_HOSTNAME));
          assertEquals("testUserName", conf.get(PropertyKey.SECURITY_LOGIN_USERNAME));
        }
      };
      configurationRule
          .apply(statementWithSet, null)
          .evaluate();
  
      // calling set will have no effect to another
      // life cycle of a ConfigurationRule
      Statement statementWithoutSet = new Statement() {
        @Override
        public void evaluate() throws Throwable {
          assertEquals("testHostName1", conf.get(PropertyKey.MASTER_HOSTNAME));
          assertFalse(conf.isSet(PropertyKey.SECURITY_LOGIN_USERNAME));
        }
      };
  
      configurationRule
          .apply(statementWithoutSet, null)
          .evaluate();
    }
  }
  