테스트 관점으로 아키텍쳐 완성하기 (Testable Architecture)

- GDG DevFest Seoul 2019 (10.20)
- Line TechTalk 사내발표 (11.18)
위 행사들에서 발표한 자료입니다.

안드로이드 개발 3년차 김데페는 MVP를 다룹니다. RxJava로 API를 호출하고 DI도 알아요. 하지만 최근 공부를 시작한 테스트가 잘 짜여지지 않습니다. 그나마 동작하는 몇 테스트도 효용이 있는지 모르겠습니다.

테스트와 아키텍쳐는 함께 움직이는 것을 아시나요? 테스트가 불편하거나 효용성이 적은 것은 아키텍쳐가 불안정하기 때문입니다. 이 발표는 MVP 아키텍쳐를 테스트 관점으로 완성시켜봅니다.

Transcript

1. పझ౟ ҙ੼ਵ۽ ইఃఫ୛ ৮ࢿೞӝ Testable Architecture ੉थ޹, ߛ௼࢟۞٘/GDE Android Korea
 @maryangmin
3. - MVPܳ ׮ܛפ׮ - RxJava۽ APIܳ ഐ୹೤פ׮. - DIܳ ঌইਃ 3֙ର ѐߊ੗ ӣؘಕח…
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6. ߊ಴ীࢲ ࢎਊೞח ӝࠄ૑ध • উ٘۽੉٘ • MVP ইఃఫ୛ • RxJava
7. ݾର 1. పझ౟ۆ? 2. పझ౟ܳ য۵ѱ ೞח Ѫ 3. Testable Architecture ٜ݅ӝ 4. Testable Architecture ৮ࢿೞӝ 5. Testable Culture 6. Ѿۿ
8. HJUIVCDPNNBSZBOHNJO(%(5FTUBCMF"SD
9. పझ౟ۆ?
10. పझ౟ۆ? যڃ ز੘ਸ ഐ୹೮ਸ ٸ, 1. ч੉ ਗೞח ഋకо غח૑ Ѩૐ 2. ਗೞח ز੘ਸ ো҅೧ࢲ ࣻ೯ೞחо Ѩૐ
11. @Test fun loginTest() { loginHelper.login() // isLogin ч੉ Trueо غ঻חо? assertTrue(loginHelper.isLogin) }
12. @Test fun loginTest() { loginHelper.login() // isLogin ч੉ Trueо غ঻חо? assertTrue(loginHelper.isLogin) }
13. @Test fun loginTest() { loginHelper.login() // isLogin ч੉ Trueо غ঻חо? assertTrue(loginHelper.isLogin) }
14. @Test fun searchTest() { presenter.searchGithubRepos(searchText) // view.showRepos(repo)о ز੘ೞחо? Mockito.verify(view).showRepos(repos) }
15. @Test fun searchTest() { presenter.searchGithubRepos(searchText) // view.showRepos(repo)о ز੘ೞחо? Mockito.verify(view).showRepos(repos) }
16. @Test fun searchTest() { presenter.searchGithubRepos(searchText) // view.showRepos(repo)о ز੘ೞחо? Mockito.verify(view).showRepos(repos) }
17. పझ౟ ਗܻ ѨૐೞҊ੗ ೞח ݫࣗ٘ܳ ࣻ೯दௌਸ ٸ, 1. ਗೞח ч੄ assert()о true 2. ਗೞח ز੘੄ verify()о true
18. పझ౟ ਗܻ ѨૐೞҊ੗ ೞח ݫࣗ٘ܳ ࣻ೯दௌਸ ٸ, 1. ਗೞח ч੄ assert()о true 2. ਗೞח ز੘੄ verify()о true
19. അप਷ ޖ঱о పझ౟о ൨ٜ׮!
20. పझ౟ܳ য۵ѱ ೞח Ѫ
21. 1. ੄ઓ Class੄ ز੘ పझ౟ܳ য۵ѱ ೞח Ѫ
22. class GithubReposPresenterTest { private lateinit var presenter: GithubReposPresenter @Before fun setUp() { presenter = GithubReposPresenter() } }
23. class GithubReposPresenterTest { private lateinit var presenter: GithubReposPresenter @Before fun setUp() { presenter = GithubReposPresenter() } }
24. class GithubRepoPresenter( view: GithubRepoView, repository: GithubRepository ) { fun issues(repo: GithubRepo) = repository.issues(owner, repo.name) .subscribe( { view.showIssues(it) }, { it.printStackTrace() } ) }
25. class GithubRepoPresenter( view: GithubRepoView, repository: GithubRepository ) { fun issues(repo: GithubRepo) = repository.issues(owner, repo.name) .subscribe( { view.showIssues(it) }, { it.printStackTrace() } ) } ੄ઓ
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26. class GithubRepoPresenter( view: GithubRepoView, repository: GithubRepository ) { fun issues(repo: GithubRepo) = repository.issues(owner, repo.name) .subscribe( { view.showIssues(it) }, { it.printStackTrace() } ) } যڌѱ
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27. class GithubReposPresenterTest { private lateinit var presenter: GithubReposPresenter @Mock lateinit var view: GithubReposView @Mock lateinit var githubRepository: GithubRepository @Before fun setUp() { presenter = GithubReposPresenter( view, githubRepository ) } }
28. class GithubReposPresenterTest { private lateinit var presenter: GithubReposPresenter @Mock lateinit var view: GithubReposView @Mock lateinit var githubRepository: GithubRepository @Before fun setUp() { presenter = GithubReposPresenter( view, githubRepository ) } } .PDL
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29. // ߈ജ чਸ ૑੿ val repos: List<GithubRepo> = emptyList() // Mock Class੄ ز੘ਸ ੿੄ Mockito.`when`( githubRepository.searchGithubRepos(anyString()) ).thenReturn(Single.just(repos))
30. // ߈ജ чਸ ૑੿ val repos: List<GithubRepo> = emptyList() // Mock Class੄ ز੘ਸ ੿੄ Mockito.`when`( githubRepository.searchGithubRepos(anyString()) ).thenReturn(Single.just(repos)) 4UVC .PDLJOH
31. 1. ੄ઓ Class੄ ز੘ - Mocking, Stub పझ౟ܳ য۵ѱ ೞח Ѫ
32. 1. ੄ઓ Class੄ ز੘ - Mocking, Stub 2. উ٘۽੉٘ ੄ઓ ز੘ పझ౟ܳ য۵ѱ ೞח Ѫ
33. class GithubReposPresenter( private val connectivityManager: ConnectivityManager, ) : BasePresenter<GithubReposView>(view) { fun onCreate() { if (connectivityManager.isConnected().not()) view.showNoInternetWarning() } }
34. class GithubReposPresenter( private val connectivityManager: ConnectivityManager, ) : BasePresenter<GithubReposView>(view) { fun onCreate() { if (connectivityManager.isConnected().not()) view.showNoInternetWarning() } } $POUFYU
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35. class GithubReposPresenter( private val connectivityManager: ConnectivityManager, ) : BasePresenter<GithubReposView>(view) { fun onCreate() { if (connectivityManager.isConnected().not()) view.showNoInternetWarning() } } @Test fun internetCheckTest() { Mockito.`when`(connectivityManagerMock.isConnected()).thenReturn(false) presenter.onCreate() Mockito.verify(view).showNoInternetWarning() }
36. class GithubReposPresenter( private val connectivityManager: ConnectivityManager, ) : BasePresenter<GithubReposView>(view) { fun onCreate() { if (connectivityManager.isConnected().not()) view.showNoInternetWarning() } } @Test fun internetCheckTest() { Mockito.`when`(connectivityManagerMock.isConnected()).thenReturn(false) presenter.onCreate() Mockito.verify(view).showNoInternetWarning() } &SSPS
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38. class NetworkHelper(context: Context) { private val connectivityManager: ConnectivityManager fun isConnected(): Boolean = connectivityManager.isConnected() } class GithubReposPresenter( private val networkHelper: NetworkHelper, ) : BasePresenter<GithubReposView>(view) { fun onCreate() { if (networkHelper.isConnected().not()) view.showNoInternetWarning() } }
39. class NetworkHelper(context: Context) { private val connectivityManager: ConnectivityManager fun isConnected(): Boolean = connectivityManager.isConnected() } class GithubReposPresenter( private val networkHelper: NetworkHelper, ) : BasePresenter<GithubReposView>(view) { fun onCreate() { if (networkHelper.isConnected().not()) view.showNoInternetWarning() } } $POUFYU
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40. @Test fun internetCheckTest() { Mockito.`when`(networkHelper.isConnected()) .thenReturn(false) presenter.onCreate() Mockito.verify(view).showNoInternetWarning() } 8SBQQJOH
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41. 1. ੄ઓ Class੄ ز੘ - Mocking, Stub 2. উ٘۽੉٘ ੄ઓ ز੘ - Wrapping, Mocking పझ౟ܳ য۵ѱ ೞח Ѫ
42. 1. ੄ઓ Class੄ ز੘ - Mocking, Stub 2. উ٘۽੉٘ ੄ઓ ز੘ - Wrapping, Mocking పझ౟ܳ য۵ѱ ೞח Ѫ ਤ
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44. Testable Architecture ٜ݅ӝ
45. Architectureۆ?
46. ௏٘੄ ৉ೡਸ ܻ࠙ೞৈ ৈ۞ ੉੼ਸ ঳ח׮ 1. оةࢿ (֫਷ ਽૘ب) 2. ߸҃ ਬোೣ (ծ਷ Ѿ೤ب) উ٘۽੉٘ীࢲח MVP, MVVMਸ ઱۽ ࢎਊ Architectureۆ?
47. ௏٘੄ ৉ೡਸ ܻ࠙ೞৈ ৈ۞ ੉੼ਸ ঳ח׮ 1. оةࢿ (֫਷ ਽૘ب) 2. ߸҃ ਬোೣ (ծ਷ Ѿ೤ب) উ٘۽੉٘ীࢲח MVP, MVVMਸ ઱۽ ࢎਊ Architectureۆ? Ӓր
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48. ਗ஗ 1 - ੄ઓࢿ ё୓ח ݽف ઱ੑ߉ח׮
49. class GithubRepoBadPresenter( view: GithubRepoView ) : BasePresenter<GithubRepoView>(view) { private val repository = GithubRepository() fun save(repo: GithubRepo) = repository.save(repo) .subscribe() } Bad Case 1 - ੄ઓࢿ ࢤࢿ
50. class GithubRepoBadPresenter( view: GithubRepoView ) : BasePresenter<GithubRepoView>(view) { private val repository = GithubRepository() fun save(repo: GithubRepo) = repository.save(repo) .subscribe() } ੄ઓࢿ
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51. class GithubRepoBadPresenter( view: GithubRepoView ) : BasePresenter<GithubRepoView>(view) { private val repository = GithubRepository() fun save(repo: GithubRepo) = repository.save(repo) .subscribe() } .PDL3FQPTJUPSZ
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52. class GithubRepoGoodPresenter( view: GithubRepoView, private val repository: GithubRepository ) : BasePresenter<GithubRepoView>(view) class GithubRepoPresenterTest : BasePresenterTest() { @Mock lateinit var githubRepository: GithubRepository override fun setUp() { presenter = GithubRepoPresenter( view, githubRepository ) } Good Case
53. class GithubRepoGoodPresenter( view: GithubRepoView, private val repository: GithubRepository ) : BasePresenter<GithubRepoView>(view) class GithubRepoPresenterTest : BasePresenterTest() { @Mock lateinit var githubRepository: GithubRepository override fun setUp() { presenter = GithubRepoPresenter( view, githubRepository ) } Good Case ੄ઓࢿ
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54. class GithubRepoGoodPresenter( view: GithubRepoView, private val repository: GithubRepository ) : BasePresenter<GithubRepoView>(view) class GithubRepoPresenterTest : BasePresenterTest() { @Mock lateinit var githubRepository: GithubRepository override fun setUp() { presenter = GithubRepoPresenter( view, githubRepository ) } Good Case .PDL
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55. class GithubRepoActivity { override val presenter: GithubRepoPresenter by lazy { GithubRepoPresenter(this, GithubRepository()) } } ࠗ۾
56. class GithubRepoActivity { override val presenter: GithubRepoPresenter by lazy { GithubRepoPresenter(this, GithubRepository()) } } ࠗ۾ 6*ী䞵
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57. class GithubRepoActivity { override val presenter: GithubRepoPresenter by lazy { GithubRepoPresenter(this, GithubRepository()) } } ࠗ۾ 6*ী䞵
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58. class IssueCreatePresenter { fun createIssue(repo: GithubRepo, title: String, body: String) = repository.createIssue(owner, name, title, body) .subscribe({ DataObserver.post(it) view.onIssueCreated() }, { view.onIssueCreateFail() }) } Bad Case 2 - Static Class
59. class IssueCreatePresenter { fun createIssue(repo: GithubRepo, title: String, body: String) = repository.createIssue(owner, name, title, body) .subscribe({ DataObserver.post(it) view.onIssueCreated() }, { view.onIssueCreateFail() }) } 4UBUJD
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60. class IssueCreatePresenter( view: IssueCreateView, private val dataObserver: DataObserver, private val repository: GithubRepository ) Good Case
61. class IssueCreatePresenter( view: IssueCreateView, private val dataObserver: DataObserver, private val repository: GithubRepository ) Good Case 4UBUJD
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62. ਗ஗ 2 - উ٘۽੉٘ ੄ઓ ز੘ਸ Wrapping ೠ׮
63. ਗ஗ 2 - উ٘۽੉٘ ੄ઓ ز੘ਸ Wrapping ೠ׮ 4%,
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64. class NetworkHelper(context: Context) { private val connectivityManager: ConnectivityManager fun isConnected(): Boolean = connectivityManager.isConnected() } class GithubReposPresenter( private val networkHelper: NetworkHelper, ) : BasePresenter<GithubReposView>(view) { fun onCreate() { if (networkHelper.isConnected().not()) view.showNoInternetWarning() } } $POUFYU
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65. interface GithubReposView { fun showNoInternetWarning() fun showLoading() fun hideLoading() fun showRepos(repos: List<GithubRepo>) } fun onCreate() { if (networkHelper.isConnected().not()) view.showNoInternetWarning() } UI Method
66. interface GithubReposView { fun showNoInternetWarning() fun showLoading() fun hideLoading() fun showRepos(repos: List<GithubRepo>) } fun onCreate() { if (networkHelper.isConnected().not()) view.showNoInternetWarning() } 7JFX
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67. interface GithubRepository { fun save(repo: GithubRepo): Completable fun star(owner: String, repo: String): Completable fun unstar(owner: String, repo: String): Completable } class IssueCreatePresenter( private val repository: GithubRepository ) { fun createIssue(repo: GithubRepo, title: String, body: String) = repository.createIssue(owner, repo.name, title, body) .subscribe{ view.onIssueCreated() } } DB / API ాन
68. interface GithubRepository { fun save(repo: GithubRepo): Completable fun star(owner: String, repo: String): Completable fun unstar(owner: String, repo: String): Completable } class IssueCreatePresenter( private val repository: GithubRepository ) { fun createIssue(repo: GithubRepo, title: String, body: String) = repository.createIssue(owner, repo.name, title, body) .subscribe{ view.onIssueCreated() } } DB / API ాन 3FQPTJUPSZ
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70. ਗ஗ 3 - ݽٚ ز੘਷ Presenterܳ ాೠ׮
71. override fun onCreate(savedInstanceState: Bundle?) { showRepo(intent.getParcelableExtra<GithubRepo>(KEY_REPO)) } private fun showRepo(repo: GithubRepo) { ownerName.text = repo.owner.userName starCount.text = repo.stargazersCount.toString() watcherCount.text = repo.watchersCount.toString() forksCount.text = repo.forksCount.toString() showStar(repo.star) presenter.issues(repo) } Bad Case 1 - ചݶ ղ private Method
72. override fun onCreate(savedInstanceState: Bundle?) { // showRepo(intent.getParcelableExtra<GithubRepo>(KEY_REPO)) } private fun showRepo(repo: GithubRepo) { ownerName.text = repo.owner.userName starCount.text = repo.stargazersCount.toString() watcherCount.text = repo.watchersCount.toString() forksCount.text = repo.forksCount.toString() showStar(repo.star) presenter.issues(repo) } ഐ୹ৈࠗ
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73. override fun onCreate(savedInstanceState: Bundle?) { presenter.onCreate(it) } fun onCreate(repo: GithubRepo) { this.repo = repo view.showRepo(repo) issues(repo) } Good Case
74. override fun onCreate(savedInstanceState: Bundle?) { presenter.onCreate(it) } fun onCreate(repo: GithubRepo) { this.repo = repo view.showRepo(repo) issues(repo) } Good Case 1SFTFOUFSী䞵
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75. @Test fun onCreateTest() { presenter.onCreate(repo) verify(view).showRepo(repo) verify(view).showIssues(issues) } Good Case 1SFTFOUFS
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76. star.onClick { val originalStar = repo.star showStar(!originalStar) showStarCount(repo.stargazersCount.let { if (originalStar) it - 1 else it + 1 }) presenter.onClickStar() } fun onClickStar() { (if (originalStar) repository.unstar(owner, repo.name) else repository.star(owner, repo.name)) ... } Bad Case 2 - ചݶ ղ ۽૒
77. star.onClick { val originalStar = repo.star showStar(!originalStar) showStarCount(repo.stargazersCount.let { if (originalStar) it - 1 else it + 1 }) presenter.onClickStar() } fun onClickStar() { (if (originalStar) repository.unstar(owner, repo.name) else repository.star(owner, repo.name)) ... } Bad Case 2 - ചݶ ղ ۽૒ ഐ୹ৈࠗ
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78. star.onClick { presenter.onClickStar() } fun onClickStar() { val originalStar = repo.star view.showStar(!originalStar) view.showStarCount(repo.stargazersCount.let { if (originalStar) it - 1 else it + 1 }) (if (originalStar) repository.unstar(owner, repo.name) else repository.star(owner, repo.name)) ... } Good Case
79. star.onClick { presenter.onClickStar() } fun onClickStar() { val originalStar = repo.star view.showStar(!originalStar) view.showStarCount(repo.stargazersCount.let { if (originalStar) it - 1 else it + 1 }) (if (originalStar) repository.unstar(owner, repo.name) else repository.star(owner, repo.name)) ... } Good Case 1SFTFOUFSী䞵
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80. @Test fun clickStarTest() { repo.star = false val originalStarCount = repo.stargazersCount presenter.onClickStar() Mockito.verify(view).showStar(true) Mockito.verify(view).showStarCount(originalStarCount + 1) } Good Case 1SFTFOUFS
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86. @RunWith(AndroidJUnit4::class) class PreferenceTest { @Test fun preferenceTest() { val context = InstrumentationRegistry.getInstrumentation().context val pref = context.getSharedPreferences("preference") val userName = pref.getString("pref_user_name", "userName") assertEquals("userName", userName) } } $POUFYU
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93. 1. ੄ઓ Class੄ ز੘ - Mocking, Stub 2. উ٘۽੉٘ ੄ઓ ز੘ - Wrapping, Mocking పझ౟ܳ য۵ѱ ೞח Ѫ
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96. 1. ز੘ ഛੋ పझ౟੄ ബਊࢿ
97. 1. ز੘ ഛੋ 2. ߸҃ ਬোࢿ ഛࠁ పझ౟੄ ബਊࢿ
98. పझ౟੄ ബਊࢿ పझ౟о
    ੓ח
    $MBTTח
    ߸҃೧ب
    উब
    ੢ӝ䥄ਵ۽
    పझ౟
    ੓ח
    Ѫ੉
    ࢤ࢑ࢿ੉
    ഻ঁ
    ࡅܰ׮ 1. ز੘ ഛੋ 2. ߸҃ ਬোࢿ ഛࠁ
99. పझ౟੄ ബਊࢿ 1. ز੘ ഛੋ 2. ߸҃ ਬোࢿ ഛࠁ 3. ௏ܻ٘࠭ܳ ذח׮
100. 1. ز੘ ഛੋ 2. ߸҃ ਬোࢿ ഛࠁ 3. ௏ܻ٘࠭ܳ ذח׮ పझ౟੄ ബਊࢿ పझ౟ח
     ੄بܳ
     ݺदച
     పझ౟ܳ
     ౵ঈೞҊ
     ௏٘ܳ
     ࠁݶ
     ܻ࠭о
     ࣻ䤰ೞ׮
101. పझ౟ زӝࠗৈ
102. 1. ܻನ౟۽ അपਸ ӵײ੗ పझ౟ زӝࠗৈ $PEFDPW
     13݃׮
     పझ౟
     ழߡܻ૑
     ܻನ౟
103. 1. ܻನ౟۽ അपਸ ӵײ੗ 2. ੊ࣼ೧૑ӝө૑ ъઁࢿਸ ف੗ పझ౟ زӝࠗৈ ழߡܻ૑
     ੉䥅ࠁ׮
     ֫૑
     ঋਵݶ
     
     %POsU
     "QQSPWF
104. 1. ܻನ౟۽ അपਸ ӵײ੗ 2. ੊ࣼ೧૑ӝө૑ ъઁࢿਸ ف੗ 3. ए਍ Ѫࠗఠ ରӔରӔ పझ౟ زӝࠗৈ 1SFTFOUFS7.
     5FTU 6OJU
     5FTU 1SFTFOUFS6OJU
     పझ౟о
     
     ࣘبо
     ࡅܰҊ
     
     ࣻݺ੉
     ӡ׮
105. ࠺ૉפझܳ
     ן୶૑
     ঋਵݶࢲ
     ೠ׳زউ
     ழߡܻ૑
     
     ૐо
106. ೠߣ
     णҙਸ
     ٜ੉ݶ
     ಞ೧૘פ׮
     5FTUBCMF
     $VMUVSF
     ನӝೞ૑
     ݃ࣁਃ ࠺ૉפझܳ
     ן୶૑
     ঋਵݶࢲ
     ೠ׳زউ
     ழߡܻ૑
     
     ૐо
107. Ѿۿ
108. ਗ஗ 1. ੄ઓࢿ ё୓ח ݽف ઱ੑ߉ח׮ 2. উ٘۽੉٘ ੄ઓ ز੘ਸ Wrapping ೠ׮ 3. ݽٚ ز੘਷ Presenterܳ ాೠ׮
109. Testable Architecture Map with Instrument 6*
     5FTU
     *OTUSVNFOU 1SFTFOUFS7.
     5FTU 3FQPTJUPSZ
     5FTU
     *OTUSVNFOU 6OJU
     5FTU
110. పझ౟ زӝࠗৈ 5FTUBCMF
     $VMUVSF 1. ܻನ౟۽ അपਸ ӵײ੗ 2. ੊ࣼ೧૑ӝө૑ ъઁࢿਸ ف੗ 3. ए਍ Ѫࠗఠ ରӔରӔ
111. పझ౟ܳ
     ੜ
     ೞ۰ݶ
     䤠ೡ੉
     ੜ
     ܻ࠙ػ
     "SDIJUFDUVSFо
     ೙ਃ
     పझ౟ܳ
     ب੹䞸ݶࢲ
     "SDIJUFDUVSFܳ
     ৮ࢿ೤द׮
112. పझ౟о
     ৮߷ೞৈب
     ߡӒח
     ߊࢤ
     पઁ
     ࢲ࠺झח
     ৔ೱਸ
     ઱Ҋ߉ח
     ஶఫझ౟о
     ݆ӝ
     ٸޙ
     FY
     ֎౟ਕ௼
     ࠛदઙܐ
     ݃੉Ӓۨ੉࣌
     ١
     2"੄
     ೙ਃࢿ
113. ࠂ੟ೞ૑
     ঋ਷
     ز੘਷
     పझ౟۽
     䟰ૐ೤द׮ పझ౟о
     ৮߷ೞৈب
     ߡӒח
     ߊࢤ
     पઁ
     ࢲ࠺झח
     ৔ೱਸ
     ઱Ҋ߉ח
     ஶఫझ౟о
     ݆ӝ
     ٸޙ
     FY
     ֎౟ਕ௼
     ࠛदઙܐ
     ݃੉Ӓۨ੉࣌
     ١
     2"੄
     ೙ਃࢿ
114. উ٘۽੉٘
     ѐߊ੗
     ݽ૘
     ೣԋ
     ߛ௼䣓۞٘
     పझ౟
     ௏٘
     ૞ࠇद׮
115. хࢎ೤פ׮! ੉थ޹, ߛ௼࢟۞٘/GDE Android Korea
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