robolectric unit test study

robolectric : robolectric의 설정법은 생략한다. 공식 홈 페이지를 참고하도록

참고 url: http://www.vogella.com/tutorials/Robolectric/article.html

예전에 작성해 둔 EventBus에 대한 test code를 작성해 보았다. 

package com.mdiwebma.base.task;

import static org.assertj.core.api.Assertions.assertThat;

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.robolectric.RobolectricGradleTestRunner;
import org.robolectric.annotation.Config;

import com.mdiwebma.base.BuildConfig;
import com.mdiwebma.base.annotation.Subscribe;
import com.mdiwebma.base.settings.SettingChangedEvent;
import com.mdiwebma.base.settings.Settings;

/**
 * @author djkim
 */
@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, manifest = "test/AndroidManifest.xml", sdk = 21, resourceDir = "res")
public class EventBusTest {

   @Before
   public void onBefore() {
      eventHistory.clear();
      EventBus.getDefault().register(this);
   }

   @After
   public void onAfter() {
      EventBus.getDefault().unregister(this);
   }

   @Test
   public void testEventBus() {
      // test unregister
      EventBus.getDefault().unregister(this);
      EventBus.getDefault().post(new SettingChangedEvent(Settings.test_int));
      assertThat(eventHistory.size()).isEqualTo(0);

      EventBus.getDefault().register(this);
      EventBus.getDefault().post(new SettingChangedEvent(Settings.test_int));
      assertThat(eventHistory.size()).isEqualTo(1);

      //test duplicate register
      EventBus.getDefault().register(this);

      EventBus.getDefault().post(new SettingChangedEvent(Settings.test_int));
      assertThat(eventHistory.size()).isEqualTo(2);
      assertThat(eventHistory.get(eventHistory.size() - 1).setting).isEqualTo(Settings.test_int);

      EventBus.getDefault().post(new SettingChangedEvent(Settings.test_string));
      assertThat(eventHistory.get(eventHistory.size() - 1).setting).isEqualTo(Settings.test_string);

      EventBus.getDefault().post(new SettingChangedEvent(Settings.test_bool));
      assertThat(eventHistory.get(eventHistory.size() - 1).setting).isEqualTo(Settings.test_bool);

      EventBus.getDefault().post(new SettingChangedEvent(Settings.test_int));
      assertThat(eventHistory.size()).isEqualTo(5);

      // test duplicate unregister
      EventBus.getDefault().unregister(this);
   }

   List<SettingChangedEvent> eventHistory = new ArrayList<>();

   @Subscribe
   public void onEvent(SettingChangedEvent event) {
      eventHistory.add(event);
   }

}

상단 소스 탭에서 "EventBusTest"에서 우클릭하여 "Run EventBustTest with Coverage"를 실행한다. 테스트 코드가 성공하면 report를 html로 export할 수 있는데, html 파일을 열어보면 테스트가 된 코드(녹색)가 안 된 코드를(붉은색) 색깔로 확인할 수 있다. 

SettingsDaoTest의 결과인데, SettingsDao은 Boolean과 Integer, String 타입에서만 구현이 되었기 때문에 그 와 타입에 대해서는 테스트되지 않아 붉은색으로 표시되고 있다. 

1 package com.mdiwebma.base.settings; 2  3 import android.support.annotation.NonNull; 4  5 import com.mdiwebma.base.helper.StringBuilderPool; 6  7 /** 8  * @author djkim 9  */ 10  11 public enum Settings { 12  13  test_bool(Settings.BooleanType, Boolean.TRUE), 14  test_string(Settings.StringType, "test_str"), 15  test_int(Settings.IntegerType, (Integer)100); 16  17  public static final int BooleanType = 0; 18  public static final int StringType = 1; 19  public static final int IntegerType = 2; 20  public static final int LongType = 3; 21  public static final int FloatType = 4; 22  public static final int DoubleType = 5; 23  24  public final int settingType; 25  public final Object defaultValue; 26  public int cacheIndex; // do not modify manually, initialized from SettingsDao static scope 27  28  private Settings(int settingType, @NonNull Object defaultValue) { 29  this.settingType = settingType; 30  this.defaultValue = defaultValue; 31  32  switch (this.settingType) { 33  case BooleanType: 34  if ((defaultValue instanceof Boolean) == false) { 35  throw new AssertionError(StringBuilderPool.concat("type mismatch=", this.name())); 36  } 37  break; 38  case StringType: 39  if ((defaultValue instanceof String) == false) { 40  throw new AssertionError(StringBuilderPool.concat("type mismatch=", this.name())); 41  } 42  break; 43  case IntegerType: 44  if ((defaultValue instanceof Integer) == false) { 45  throw new AssertionError(StringBuilderPool.concat("type mismatch=", this.name())); 46  } 47  break; 48  case LongType: 49  if ((defaultValue instanceof Long) == false) { 50  throw new AssertionError(StringBuilderPool.concat("type mismatch=", this.name())); 51  } 52  break; 53  case FloatType: 54  if ((defaultValue instanceof Float) == false) { 55  throw new AssertionError(StringBuilderPool.concat("type mismatch=", this.name())); 56  } 57  break; 58  case DoubleType: 59  if ((defaultValue instanceof Double) == false) { 60  throw new AssertionError(StringBuilderPool.concat("type mismatch=", this.name())); 61  } 62  break; 63  default: 64  throw new AssertionError(StringBuilderPool.concat("unsupported key type=", this.name())); 65  } 66  } 67  68

 }