heron/eco/tests/java/com/twitter/heron/eco/builder/ComponentBuilderTest.java

//  Copyright 2018 Twitter. All rights reserved.
//
//  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
//
//  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.twitter.heron.eco.builder;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.runners.MockitoJUnitRunner;

import com.twitter.heron.eco.definition.BeanDefinition;
import com.twitter.heron.eco.definition.EcoExecutionContext;
import com.twitter.heron.eco.definition.EcoTopologyDefinition;

import static org.mockito.Matchers.anyObject;
import static org.mockito.Matchers.eq;
import static org.mockito.Matchers.same;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@RunWith(MockitoJUnitRunner.class)
public class ComponentBuilderTest {

  @Mock
  private EcoExecutionContext mockContext;
  @Mock
  private ObjectBuilder mockObjectBuilder;

  private ComponentBuilder subject;

  @Before
  public void setUpForEachTestCase() {
    subject = new ComponentBuilder();
  }

  @After
  public void ensureNoUnexpectedMockInteractions() {
    Mockito.verifyNoMoreInteractions(mockContext,
        mockObjectBuilder);
  }

  @Test
  public void testBuildComponents_AllGood_BehavesAsExpected() throws ClassNotFoundException,
      InvocationTargetException, NoSuchFieldException,
      InstantiationException, IllegalAccessException {
    BeanDefinition beanDefinition = new BeanDefinition();
    final String id = "bean";
    beanDefinition.setId(id);
    BeanDefinition beanDefinition1 = new BeanDefinition();
    final String id1 = "bean1";
    beanDefinition1.setId(id1);
    List<BeanDefinition> componentDefinitions = new ArrayList<>();
    componentDefinitions.add(beanDefinition);
    componentDefinitions.add(beanDefinition1);
    EcoTopologyDefinition ecoTopologyDefinition = new EcoTopologyDefinition();
    ecoTopologyDefinition.setComponents(componentDefinitions);
    Object object = new Object();
    Object object1 = new Object();

    when(mockContext.getTopologyDefinition()).thenReturn(ecoTopologyDefinition);
    when(mockObjectBuilder.buildObject(eq(beanDefinition), eq(mockContext))).thenReturn(object);
    when(mockObjectBuilder.buildObject(eq(beanDefinition1), eq(mockContext))).thenReturn(object1);

    subject.buildComponents(mockContext, mockObjectBuilder);

    verify(mockContext).getTopologyDefinition();
    verify(mockObjectBuilder).buildObject(same(beanDefinition), same(mockContext));
    verify(mockObjectBuilder).buildObject(same(beanDefinition1), same(mockContext));
    verify(mockContext).addComponent(eq(id), anyObject());
    verify(mockContext).addComponent(eq(id1), anyObject());
  }
}