KettleLifecycleSupportTest.java

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 * Pentaho Data Integration
 *
 * Copyright (C) 2016 by Pentaho : http://www.pentaho.com
 *
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 * Licensed 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
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 *    http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing, software
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package org.pentaho.di.core.lifecycle;

import org.junit.Before;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.pentaho.di.core.plugins.KettleLifecyclePluginType;
import org.pentaho.di.core.plugins.PluginInterface;
import org.pentaho.di.core.plugins.PluginRegistry;
import org.pentaho.di.core.plugins.PluginTypeListener;

import java.util.ArrayList;
import java.util.List;

import static org.junit.Assert.assertNotNull;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

public class KettleLifecycleSupportTest {

  private PluginRegistry registry;
  private List<PluginInterface> registeredPlugins;
  private ArgumentCaptor<PluginTypeListener> typeListenerRegistration;

  @Before
  public void setUpPluginRegistry() throws Exception {
    // Intercept access to registry
    registry = LifecycleSupport.registry = KettleLifecycleSupport.registry = mock( PluginRegistry.class );
    registeredPlugins = new ArrayList<PluginInterface>();
    when( registry.getPlugins( KettleLifecyclePluginType.class ) ).thenReturn( registeredPlugins );
    typeListenerRegistration = ArgumentCaptor.forClass( PluginTypeListener.class );
    doNothing().when( registry ).addPluginListener( eq( KettleLifecyclePluginType.class ), typeListenerRegistration.capture() );
  }

  @Test
  public void testOnEnvironmentInit() throws Exception {
    final List<KettleLifecycleListener> listeners = new ArrayList<KettleLifecycleListener>();
    listeners.add(  createLifecycleListener() );
    KettleLifecycleSupport kettleLifecycleSupport = new KettleLifecycleSupport();
    assertNotNull( typeListenerRegistration.getValue() );

    KettleLifecycleListener preInit = createLifecycleListener();
    listeners.add( preInit );
    doAnswer( new Answer() {
      @Override public Object answer( InvocationOnMock invocation ) throws Throwable {
        listeners.add( createLifecycleListener() );
        return null;
      }
    } ).when( preInit ).onEnvironmentInit();

    verifyNoMoreInteractions( listeners.toArray() );

    // Init environment
    kettleLifecycleSupport.onEnvironmentInit();
    for ( KettleLifecycleListener listener : listeners ) {
      verify( listener ).onEnvironmentInit();
    }
    verifyNoMoreInteractions( listeners.toArray() );

    KettleLifecycleListener postInit = createLifecycleListener();
    verify( postInit ).onEnvironmentInit();

    verifyNoMoreInteractions( listeners.toArray() );
  }

  private KettleLifecycleListener createLifecycleListener() throws org.pentaho.di.core.exception.KettlePluginException {
    PluginInterface pluginInterface = mock( PluginInterface.class );
    KettleLifecycleListener kettleLifecycleListener = mock( KettleLifecycleListener.class );
    registeredPlugins.add( pluginInterface );
    when( registry.loadClass( pluginInterface, KettleLifecycleListener.class ) ).thenReturn( kettleLifecycleListener );
    when( registry.loadClass( pluginInterface ) ).thenReturn( kettleLifecycleListener );
    if ( !typeListenerRegistration.getAllValues().isEmpty() ) {
      typeListenerRegistration.getValue().pluginAdded( pluginInterface );
    }
    return kettleLifecycleListener;
  }
}