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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
   *     http://www.apache.org/licenses/LICENSE-2.0
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  package org.apache.cassandra.triggers;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.cql3.statements.schema.CreateTableStatement;
  import org.apache.cassandra.exceptions.ConfigurationException;
  import org.apache.cassandra.schema.KeyspaceMetadata;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.schema.Schema;
  import org.apache.cassandra.schema.SchemaTestUtil;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.schema.Tables;
  import org.apache.cassandra.schema.TriggerMetadata;
  import org.apache.cassandra.schema.Triggers;
  
  import static org.apache.cassandra.utils.Clock.Global.nanoTime;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  public class TriggersSchemaTest
  {
      String ksName = "ks" + nanoTime();
      String cfName = "cf" + nanoTime();
      String triggerName = "trigger_" + nanoTime();
      String triggerClass = "org.apache.cassandra.triggers.NoSuchTrigger.class";
  
      @BeforeClass
      public static void beforeTest() throws ConfigurationException
      {
          SchemaLoader.loadSchema();
      }
  
      @Test
      public void newKsContainsCfWithTrigger() throws Exception
      {
          TriggerMetadata td = TriggerMetadata.create(triggerName, triggerClass);
          TableMetadata tm =
              CreateTableStatement.parse(String.format("CREATE TABLE %s (k int PRIMARY KEY, v int)", cfName), ksName)
                                  .triggers(Triggers.of(td))
                                  .build();
  
          KeyspaceMetadata ksm = KeyspaceMetadata.create(ksName, KeyspaceParams.simple(1), Tables.of(tm));
          SchemaTestUtil.announceNewKeyspace(ksm);
  
          TableMetadata tm2 = Schema.instance.getTableMetadata(ksName, cfName);
          assertFalse(tm2.triggers.isEmpty());
          assertEquals(1, tm2.triggers.size());
          assertEquals(td, tm2.triggers.get(triggerName).get());
      }
  
      @Test
      public void addNewCfWithTriggerToKs() throws Exception
      {
          KeyspaceMetadata ksm = KeyspaceMetadata.create(ksName, KeyspaceParams.simple(1));
          SchemaTestUtil.announceNewKeyspace(ksm);
  
          TableMetadata metadata =
              CreateTableStatement.parse(String.format("CREATE TABLE %s (k int PRIMARY KEY, v int)", cfName), ksName)
                                  .triggers(Triggers.of(TriggerMetadata.create(triggerName, triggerClass)))
                                  .build();
  
          SchemaTestUtil.announceNewTable(metadata);
  
          metadata = Schema.instance.getTableMetadata(ksName, cfName);
          assertFalse(metadata.triggers.isEmpty());
          assertEquals(1, metadata.triggers.size());
          assertEquals(TriggerMetadata.create(triggerName, triggerClass), metadata.triggers.get(triggerName).get());
      }
  
      @Test
      public void addTriggerToCf() throws Exception
      {
          TableMetadata tm1 =
              CreateTableStatement.parse(String.format("CREATE TABLE %s (k int PRIMARY KEY, v int)", cfName), ksName)
                                  .build();
          KeyspaceMetadata ksm = KeyspaceMetadata.create(ksName, KeyspaceParams.simple(1), Tables.of(tm1));
          SchemaTestUtil.announceNewKeyspace(ksm);
  
          TriggerMetadata td = TriggerMetadata.create(triggerName, triggerClass);
          TableMetadata tm2 =
              Schema.instance
                    .getTableMetadata(ksName, cfName)
                    .unbuild()
                    .triggers(Triggers.of(td))
                    .build();
          SchemaTestUtil.announceTableUpdate(tm2);
  
          TableMetadata tm3 = Schema.instance.getTableMetadata(ksName, cfName);
          assertFalse(tm3.triggers.isEmpty());
          assertEquals(1, tm3.triggers.size());
          assertEquals(td, tm3.triggers.get(triggerName).get());
      }
  
      @Test
      public void removeTriggerFromCf() throws Exception
      {
          TriggerMetadata td = TriggerMetadata.create(triggerName, triggerClass);
          TableMetadata tm =
              CreateTableStatement.parse(String.format("CREATE TABLE %s (k int PRIMARY KEY, v int)", cfName), ksName)
                                  .triggers(Triggers.of(td))
                                  .build();
          KeyspaceMetadata ksm = KeyspaceMetadata.create(ksName, KeyspaceParams.simple(1), Tables.of(tm));
          SchemaTestUtil.announceNewKeyspace(ksm);
  
          TableMetadata tm1 = Schema.instance.getTableMetadata(ksName, cfName);
          TableMetadata tm2 =
              tm1.unbuild()
                 .triggers(tm1.triggers.without(triggerName))
                 .build();
          SchemaTestUtil.announceTableUpdate(tm2);
  
          TableMetadata tm3 = Schema.instance.getTableMetadata(ksName, cfName);
          assertTrue(tm3.triggers.isEmpty());
      }
  }
  