This document contains notes from an ATEC meeting on May 26, 2011. The agenda items included discussing JUnit, the Android testing framework, and Android mocking. It provides details on different types of Android test cases like AndroidTestCase and ActivityInstrumentationTestCase2. It also covers how to use mocks in Android tests to isolate dependencies and make tests less fragile. Private methods and fields are discussed as challenges for testing. The benefits of using mocks to avoid dependencies on actual classes are explained.

1. 2011.05.25 ATEC Mtg#7
2011 5 26

2. • Twitter id @nowsprinting
•
•
• Java, Swing, Do-Ja, iOS SIer/
2011 5 26

3. Agenda
•
• JUnit
• Android Testing Framework
• Android Mock
2011 5 26

4. 2011 5 26

5. ©snsk at ATEC Mtg#1
2011 5 26

6. ©snsk at ATEC Mtg#1
2011 5 26

7. 2011 5 26

8. Activity
Http
Lib (Mock)
Lib (Mock)
2011 5 26

9. →
Monkey
God Hand
Runner
Activity
Http
Lib (Mock)
Lib (Mock)
Robolectric AndroidTest
2011 5 26

10. →
Android
Activity
Monkey
→ God Hand
Runner
→suspend→resume
Activity
Http
Lib (Mock)
Lib (Mock)
Robolectric AndroidTest
2011 5 26

11. →
Monkey
Instrumental God Hand
Runner
TestCase
Activity
Http
Lib (Mock)
Lib (Mock)
Robolectric AndroidTest
2011 5 26

12. JUnit
• Android Testing Framework JUnit3
• TestCase
• TestCase Assertion
2011 5 26

13. TestCase
package jp.group.android.atec.testter.logic;
public class TwitterLogic {
}
package
package jp.group.android.atec.testter.logic;
public class TwitterLogicTest
extends AndroidTestCase {
}
Class ”Test”
JUnit TestCase
2011 5 26

14. “test” + +
public void testTwitterLogicAuthorization() {
Authorization auth4test = ...
TwitterLogic target = new TwitterLogic(auth4test);
assertNotNull("Twitter ",
target.twitter);
}
Assertion
2011 5 26

15. assert()
2011 5 26

16. 2011 5 26

17. Android Testing
Framework
2011 5 26

18. Test Project
2011 5 26

19. eclipse package explorer
New Test Project...
2011 5 26

20. Dialog (1/2)
TestProject
Project
2011 5 26

21. Dialog (2/2)
package
•
• Class package
2011 5 26

22. Why?
2011 5 26

23. Android Testing Framework /
2011 5 26

24. Android Testing Framework /
2011 5 26

25. Android Testing Framework /
•
• Class package
package
2011 5 26

26. TestCase
2011 5 26

27. Test Cases (1/2)
• AndroidTestCase
• ApplicationTestCase
• LoaderTestCase
• ProviderTestCase2
• ServiceTestCase
※ JUnit TestCase
2011 5 26

28. Test Cases (1/2)
• AndroidTestCase
• ApplicationTestCase
• LoaderTestCase Testter
• ProviderTestCase2
• ServiceTestCase
※ JUnit TestCase
2011 5 26

29. Test Cases (2/2)
• InstrumentationTestCase
• ActivityTestCase
• ActivityInstrumentationTestCase2
• ActivityUnitTestCase
• SingleLaunchActivityTestCase
• SyncBaseInstrumentation
2011 5 26

30. AndroidTestCase
2011 5 26

31. AndroidTestCase
• Activity
• Context getContext()
Context
2011 5 26

32. public class PreferenceLogicTest extends
AndroidTestCase {
public void testWriteReadToken() {
PreferenceLogic logic =
PreferenceLogic.getInstance();
logic.writeToken(getContext(),
new AccessToken("11111", "22222"));
AccessToken token =
logic.readToken(getContext());
assertEquals("11111", token.getToken());
assertEquals("22222", token.getTokenSecret());
}
}
2011 5 26

33. ActivityInstrumentation
TestCase2
2011 5 26

34. ActivityInstrumentation
TestCase2
• Activity
• Activity
• Context getContext()
• ActivityInstrumentationTestCase
@Deprecated
2011 5 26

35. package jp.group.android.atec.testter;
public class AuthActivityTest extends
ActivityInstrumentationTestCase2<AuthActivity> {
protected void setUp() throws Exception {
super.setUp();
setActivityInitialTouchMode(true);
mIntent = new Intent();
setActivityIntent(mIntent);
mActivity = getActivity();
mEditText = (EditText)
mActivity.findViewById(R.id.pinEdit);
mButton = (Button)
mActivity.findViewById(R.id.registBtn);
}
2011 5 26

36. package jp.group.android.atec.testter;
public class AuthActivityTest extends
ActivityInstrumentationTestCase2<AuthActivity> {
protected void setUp() throws Exception {
super.setUp();
setActivityInitialTouchMode(true);
mIntent = new Intent(); Activity
setActivityIntent(mIntent);
mActivity = getActivity();
mEditText = (EditText)
mActivity.findViewById(R.id.pinEdit);
mButton = (Button)
mActivity.findViewById(R.id.registBtn);
}
package res
2011 5 26

37. public void testRegistBtnText() {
//
assertTrue(mButton.getText().toString()
.equalsIgnoreCase(" "));
}
Assertion
2011 5 26

38. ※ UI
public void testClickButton() {
mActivity.runOnUiThread(new Runnable() {
public void run() {
try {
mButton.performClick();
assertXxx(...);
} catch (RuntimeException e) {
assertXxx(...);
}
}
});
}
2011 5 26

39. private
2011 5 26

40. private
private final PreferenceLogic preferenceLogic
= PreferenceLogic.getInstance();
private Drawable getCacheDrawable(URL url) {
(snip)
}
2011 5 26

41. Class<AuthActivity> clazz = AuthActivity.class;
Field field = clazz
.getDeclaredField("preferenceLogic");
Method method = getClass()
.getMethod("getCacheDrawable");
method.invoke();
2011 5 26

42. CV
2011 5 26

43. Fragile Test
private final PreferenceLogic preferenceLogic
= PreferenceLogic.getInstance();
private Drawable getCacheDrawable(URL url) {
(snip)
}
default Package Private
2011 5 26

44. ※
Class<View> clazz = View.class;
Field field =
clazz.getDeclaredField("mOnClickListener");
field.setAccessible(true);
assertTrue(field.get(mButton) != null);
AndroidSDK Class field
→ Mock
2011 5 26

45. 2011 5 26

46. public AccessToken auth(String pin) {
AccessToken accessToken = null;
try {
(snip)
} catch (TwitterException e) {
(snip)
throw new RuntimeException(e);
}
return accessToken;
}
==
2011 5 26

47. fail
try {
target.auth(null);
fail("Twitter#getOAuthAccessToken()
");
} catch (RuntimeException e) {
assertEquals("catch ",
expected, e.getCause());
}
2011 5 26

48. Android Mock
2011 5 26

49. Android Mock
• Dalvk EasyMock
• Mock Class
2011 5 26

50. public AccessToken auth(String pin) {
AccessToken accessToken = null;
try {
if (pin == null || "".equals(pin.trim())) {
accessToken =
twitter.getOAuthAccessToken();
} else {
(snip)
}
} catch (TwitterException e) {
(snip)
} Twitter4J
(snip)
}
2011 5 26

51. 1/2
@UsesMocks(Twitter.class)
public void testAuth_ _PIN null() {
// setup mock
AccessToken expectedToken
= new AccessToken("testToken", "testSecret");
Twitter Mock
Twitter twitterMock
= AndroidMock.createMock(Twitter.class);
AndroidMock.expect(twitterMock
.getOAuthAccessToken()).andReturn(expectedToken);
AndroidMock.replay(twitterMock);
2011 5 26

52. 2/2
// setup test target
TwitterLogic target = new TwitterLogic();
target.twitter = twitterMock;
Mock
// do test.
AccessToken actual = target.auth(null);
assertEquals(" AccessToken ",
expectedToken, actual);
// Mock
AndroidMock.verify(twitterMock);
}
Mock
2011 5 26

53. @UsesMocks(Twitter.class)
public void testAuth_ _ () {
// setup mock
TwitterException expected =
new TwitterException("Unauthorized", null, 401);
Twitter twitterMock = AndroidMock
.createMock(Twitter.class);
AndroidMock.expect(twitterMock
.getOAuthAccessToken()).andThrow(expected);
AndroidMock.replay(twitterMock);
2011 5 26

54. http://www.slideshare.net/goyoki/an-approach-to-improving-the-maintainability-
of-unit-tests-xpjugkansai2011
2011 5 26

55. • backlog wiki
•
2011 5 26

56. 2011.05.25 20:01
2011 5 26