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既存のAndroidアプリをリファクタリングしていく話
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hisaichi5518
July 02, 2016
Technology
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既存のAndroidアプリをリファクタリングしていく話
hisaichi5518
July 02, 2016
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Transcript
!IJTBJDIJ(.01&1"#0JOD طଘͷ"OESPJEΞϓϦΛ ϦϑΝΫλϦϯά͍ͯ͘͠
γχΞΤϯδχΞ !IJTBJDIJ ٢ߴ༝ཬࢠ٢ߴ༝ཬࢠ٢ߴ༝ཬࢠ XXXZPTIJUBLBZVSJLPDPN
NJOOF ϛϯω
ࠓɺ"OESPJEΞϓϦΛ୲த
طଘͷ"OESPJEΞϓϦΛ ϦϑΝΫλϦϯά͢Δ
ͳʹΛ͔͢ w͍͔ͭ͘ى͖ͨʹ͍ͭͯɾͲ͏ͬͯղܾ͔ͨ͠
͞ͳ͍͜ͱ w3Y+BWBͱ͔%BUB#JOEJOHͱ͔φ͍ϥΠϒϥϦͷ wઈඒ͍͠ઃܭͷ
None
ळʙ w"OESPJEΞϓϦͷ։ൃελʔτ wॳ"OESPJEνʔϜਓ wJ04ΞϓϦʹൺͯػೳͷ͕ࠩ͋ͬͨͷͰɺͱʹ͔͘ ։ൃεϐʔυ༏ઌ wIUUQTQFQBCPDPNSFDSVJUJOUFSWJFX @
Նʙ w"OESPJEΞϓϦνʔϜ͕ਓʹͳͬͨ wࣗ͜ͷࠒʹ"OESPJEνʔϜʹೖͬͨ
͜Ε͔Βόʔϯͱ͍ͧ͘ʙʂ
ൃੜ
ςετ͕ͳ͍
ͳͥςετ͕ඞཁͳͷ͔ wΑΓ৴པग़དྷΔΞϓϦʹ͠ͳ͚ΕͳΒͳ͍͔Β
৴པग़དྷΔΞϓϦͬͯͳʹ wΞϓϦʹόά͕গͳ͍ wΞϓϦ͕ಥવམͪͳ͍ wαʔϏεӡӦݩ͕৴༻ग़དྷΔ wͳͲͳͲ༷ʑͳཁҼ͕͋Δ
৴པग़དྷΔΞϓϦͬͯͳʹ wΞϓϦʹόά͕গͳ͍ wΞϓϦ͕ಥવམͪͳ͍ wαʔϏεӡӦݩ͕৴༻ग़དྷΔ wͳͲͳͲ༷ʑͳཁҼ͕͋Δ ຬ͍ͨͨ͠
৴པग़དྷΔΞϓϦʹͳΔͨΊ ςετඞཁ
ςετͳ͍Λ ղܾ͢ΔͨΊʹͬͨ͜ͱ
ղܾ͢ΔͨΊʹ w6*ςετΛॻ͘ wςετͷͷಋೖ w%FWJDF'BSNΛ͏
6*ςετΛॻ͜͏ wϙνϙνςετΛগࣗ͠ಈԽ͍ͨ͠ w&TQSFTTPΛར༻͍ͯ͠·͢
1 @RunWith(AndroidJUnit4.class) 2 @LargeTest 3 public class HelloWorldEspressoTest { 4
5 @Rule 6 public ActivityTestRule<MainActivity> mActivityRule 7 = new ActivityTestRule(MainActivity.class); 8 9 @Test 10 public void listGoesOverTheFold() { 11 onView(withText("Hello world!")).check(matches(isDisplayed())); 12 } 13 }
1 @RunWith(AndroidJUnit4.class) 2 @LargeTest 3 public class HelloWorldEspressoTest { 4
5 @Rule 6 public ActivityTestRule<MainActivity> mActivityRule 7 = new ActivityTestRule(MainActivity.class); 8 9 @Test 10 public void listGoesOverTheFold() { 11 onView(withText("Hello world!")).check(matches(isDisplayed())); 12 } 13 }
ςετͷͷಋೖ wςετΛॻ͘͜ͱʹ׳Εͯͳ͍ਓ͕ଟ͔ͬͨ wςετΛॻ͘͜ͱʹ׳ΕΔͨΊʹɺςετ͚ͩΛॻ ͘Λिؒʹઃ͚Δ͜ͱʹͨ͠
%FWJDF'BSNͷར༻ w6*ςετΛॻ͍ͯܧଓతʹ࣮ߦ͍ͯ͠ͳ͍ͱҙຯ͕ ͳ͍ w"NB[PO͕ࣾఏڙ͢Δʮ࣮ࡍͷσόΠεΛར༻ͯ͠ς ετΛ࣮ߦͯ͘͠ΕΔʯαʔϏε wϒϥϯνຖʹ࣮ߦ͢ΔΑ͏ʹͯ͠ɺςετ͕௨Βͳ͍ ͱϚʔδ͠ͳ͍ϧʔϧΛܾΊͨ
ਐΊํ
ػೳ։ൃͦͷ··ਐΊΔ wػೳ։ൃͦͷ··ਐΊͳ͕Βɺ৽͘͠։ൃ͢Δͱ͜ ΖͷςετΛͳΔ͘ॻ͍͍ͯ͘ํ wνʔϜϝϯόʔ͕૿͑ͨͷػೳ։ൃΛΑΓεϜʔζ ʹߦ͏ͨΊͳͷͰɺςετΛॻ͘ͱ͍͏͜ͱػೳ։ ൃΛࢭΊͯ·ͰΔ͜ͱͰͳ͔ͬͨ
δϫδϫͱ6*ςετ͕ ૿͖͑ͯͨ
ൃੜ
6*ςετͭΒ͍
6*ςετͷͳʹ͕ͭΒ͍ wλΠϛϯά࣍ୈͰ࣌ʑίέΔςετ͕૿͑ͨ wେ͖ΊͷมߋΛߦ͏ͱ6*ςετͷ࡞Γ͠ʹͳͬͯԿ 6*ςετΛॻ͖ͯ͠Δ w6*ςετͷ࣮ߦ͕࣌ؒͯ͘ɺ͕ͭ࣌ؒ૿͑ͨ wͦͦ6*ςετΛॻͨ͘Ίʹ֮͑Δࣄ͕ଟͯ͘େม
ςετΛͭΒ͍ͷආ͚͍ͨͷʹ ͨ͘͠ͳ͍ͷͰղܾ͍ͨ͠
6*ςετΑΓ୯ମςετͷ ΄͏͕ྑ͍ؾ͕͢Δ
6*ςετWT୯ମςετ w6*ςετɺςετͷ୯Ґ͕େ͖͍ w୯ମςετɺϝιου୯ҐͰਖ਼͘͠ಈ࡞͢Δͷ͔ݕ ূ͢ΔͷͰςετͷ୯Ґ͕খ͍͞ w୯ମςετɺ֮͑Δ͜ͱগͳ͍
ͬͺ୯ମςετͷ΄͏͕ ྑ͍ؾ͕͢Δ
ͳͥͨͪ6*ςετΛॻ ͍͍ͯΔΜͩ
"OESPJE5FTUͰͳ͍ͱಈ͔ͳ͍ Ϋϥεͷதʹςετ͍ͨ͠ͷ͕ ͋Δ
ͳͥ୯ମςετͷதͰಈ͔ͳ͍Ϋϥε ͷதʹςετ͍ͨ͠ͷ͕͋Δ
̍ͭͷΫϥεͷ͕େ͖͗͢ɻ ΫϥεͷΛখ͘͞ग़དྷ͍ͯͳ ͍
ͭͷΫϥεʹ٧ΊࠐΈա͗
ͳͥͭͷΫϥεʹ٧ΊࠐΈա͗Δͱͳͷ͔ w୯ମςετ͕ॻ͖ʹ͍͘ wαʔϏεΛΑΓͤ͞ΔʹɺมԽʹڧ͘ͳ͚Ε ͳΒͳ͍
มԽʹڧ͍ wมԽʹڧ͍ͱɺʮίʔυͷཧղ͕͍͢͠ʯʮมߋ ΛՃ͍͑͢ʯʮՃ͑ͨมߋͷӨڹΛཧղ͍͢͠ʯ Λࢦ͢
ͭͷΫϥεʹ٧ΊࠐΈա͗Δͱʜ wʮίʔυͷཧղ͕͠ʹ͍͘ʯʮมߋΛՃ͑ʹ͍͘ʯʮՃ ͑ͨมߋͷӨڹΛཧղ͠ʹ͍͘ʯ w୯ମςετͰςετ͠ʹ͍͘
ͳͷͰ ͭͷΫϥεʹ٧ΊࠐΈ͗͢
ͭͷΫϥεʹ٧ΊࠐΈա͗Λ ղܾ͢ΔͨΊʹͬͨ͜ͱ
ͳͥΛখ͘͞ग़དྷ͍ͯ ͳ͍ͷ͔
Ϋϥε͕ԿΛ୲͖͢ͳͷ͔໌֬ ʹܾ·͍ͬͯͳ͍͔Β
ͭ·Γɺܾ·ΓࣄΛܾΊͯ͋͛ΕΑ͍
ܾ·ΓࣄΞʔΩςΫνϟ
.71ΞʔΩςΫνϟΛ࠾༻͢Δ
ϩδοΫ wϓϨθϯςʔγϣϯϩδοΫ wϏδωεϩδοΫ
ϓϨθϯςʔγϣϯϩδοΫ ඞཁͳΛϏδωεϩδοΫʹ ͢·ͰͷৼΔ͍
ϏδωεϩδοΫ "1*σʔλϕʔεͳͲ͔Β Λಘͯɺฦ͢
ϓϨθϯςʔγϣϯϩδοΫ ϏδωεϩδοΫ͔Β ฦ͖ͬͯͨΛܗͯ͠ දࣔ͢ΔৼΔ͍
None
.71ΞʔΩςΫνϟ
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.7$"OESJPEΞϓϦʹ͍͍ͯͳ͍
7JFXͷૢ࡞ "DUJWJUZͰߦ͏
$POUSPMMFS "DUJWJUZʹॻ͘
7JFX $POUSPMMFS"DUJWJUZ
ΫϥεͷΛখ͘͞ग़དྷ͍ͯͳ͍
.7$"OESJPEΞϓϦʹ͍͍ͯͳ͍
.71
.PEFM7JFX1SFTFOUFS
.PEFM wϏδωεϩδοΫΛॻ͘ w1SFTFOUFSʹґଘ͠ͳ͍ w7JFXʹґଘ͠ͳ͍
7JFX wϢʔβʔ͔ΒͷೖྗΛड͚औΔ wϢʔβʔ͔ΒͷೖྗΛ1SFTFOUFSʹ͢ wը໘ͷදࣔߋ৽Λߦ͏
1SFTFOUFS wϓϨθϯςʔγϣϯϩδοΫΛॻ͘ w7JFXͷߋ৽ɺJOUFSGBDFΛܦ༝ͯ͠ߦ͏
.7$WT.71
.7$
1 public class UserActivity extends AppCompatActivity { 2 @Override 3
protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 fetchUser(userId); 6 } 7 8 private void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 showName(name); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 showError(error); 19 } 20 }); 21 } 22 23 public void showName(String name) { 24 mTextView.setText(name); 25 } 26 27 public void showError(...) { ... } 28 }
1 public class UserActivity extends AppCompatActivity { 2 @Override 3
protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 fetchUser(userId); 6 } 7 8 private void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 showName(name); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 showError(error); 19 } 20 }); 21 } 22 23 public void showName(String name) { 24 mTextView.setText(name); 25 } 26 27 public void showError(...) { ... } 28 } ೖྗΛड͚औΔ ϓϨθϯςʔγϣϯϩδοΫ 7JFXͷߋ৽
1 public class UserActivity extends AppCompatActivity { 2 @Override 3
protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 fetchUser(userId); 6 } 7 8 private void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 showName(name); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 showError(error); 19 } 20 }); 21 } 22 23 public void showName(String name) { 24 mTextView.setText(name); 25 } 26 27 public void showError(...) { ... } 28 } ೖྗΛड͚औΔ
1 public class UserActivity extends AppCompatActivity { 2 @Override 3
protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 fetchUser(userId); 6 } 7 8 private void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 showName(name); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 showError(error); 19 } 20 }); 21 } 22 23 public void showName(String name) { 24 mTextView.setText(name); 25 } 26 27 public void showError(...) { ... } 28 } ϓϨθϯςʔγϣϯϩδοΫ
1 public class UserActivity extends AppCompatActivity { 2 @Override 3
protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 fetchUser(userId); 6 } 7 8 private void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 showName(name); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 showError(error); 19 } 20 }); 21 } 22 23 public void showName(String name) { 24 mTextView.setText(name); 25 } 26 27 public void showError(...) { ... } 28 } 7JFXͷߋ৽
1 public class UserActivity extends AppCompatActivity { 2 @Override 3
protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 fetchUser(userId); 6 } 7 8 private void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 showName(name); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 showError(error); 19 } 20 }); 21 } 22 23 public void showName(String name) { 24 mTextView.setText(name); 25 } 26 27 public void showError(...) { ... } 28 } ೖྗΛड͚औΔ ϓϨθϯςʔγϣϯϩδοΫ 7JFXͷߋ৽
.71
1 public class UserActivity extends AppCompatActivity implements UserView { 2
@Override 3 protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 UserPresenter presenter = new UserPresenter(this); 6 presenter.fetchUser(userId); 7 } 8 9 @Override 10 public void showName(String name) { 11 mTextView.setText(name); 12 } 13 14 @Override 15 public void showError(...) { ... } 16 } 6TFS"DUJWJUZ
1 public class UserActivity extends AppCompatActivity implements UserView { 2
@Override 3 protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 UserPresenter presenter = new UserPresenter(this); 6 presenter.fetchUser(userId); 7 } 8 9 @Override 10 public void showName(String name) { 11 mTextView.setText(name); 12 } 13 14 @Override 15 public void showError(...) { ... } 16 } 1 public interface UserView { 2 void showName(String name); 3 void showError(...); 4 } 7JFXͷߋ৽ϝιου͕ఆٛ 6TFS7JFX
1 public class UserPresenter { 2 UserView mView; 3 4
public UserPresenter(UserView view) { 5 mView = view; 6 } 7 8 public void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 mView.showName(user.getName()); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 mView.showError(error); 19 } 20 }); 21 } 22 } 6TFS1SFTFOUFS
1 public class UserActivity extends AppCompatActivity implements UserView { 2
@Override 3 protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 UserPresenter presenter = new UserPresenter(this); 6 presenter.fetchUser(userId); 7 } 8 9 @Override 10 public void showName(String name) { 11 mTextView.setText(name); 12 } 13 14 @Override 15 public void showError(...) { ... } 16 } ೖྗΛड͚औΔ 7JFXͷߋ৽ 6TFS"DUJWJUZ
1 public class UserActivity extends AppCompatActivity implements UserView { 2
@Override 3 protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 UserPresenter presenter = new UserPresenter(this); 6 presenter.fetchUser(userId); 7 } 8 9 @Override 10 public void showName(String name) { 11 mTextView.setText(name); 12 } 13 14 @Override 15 public void showError(...) { ... } 16 } ೖྗΛड͚औΔ 6TFS"DUJWJUZ
1 public class UserPresenter { 2 UserView mView; 3 4
public UserPresenter(UserView view) { 5 mView = view; 6 } 7 8 public void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 mView.showName(user.getName()); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 mView.showError(error); 19 } 20 }); 21 } 22 } 6TFS1SFTFOUFS ϓϨθϯςʔγϣϯϩδοΫ
1 public class UserPresenter { 2 UserView mView; 3 4
public UserPresenter(UserView view) { 5 mView = view; 6 } 7 8 public void fetchUser(int userId) { 9 UserService service = ApiClient.getInstance().create(UsersService.class); 10 service.fetch(userId, new Callback<User>() { 11 @Override 12 public void success(User user, Response response) { 13 mView.showName(user.getName()); 14 } 15 16 @Override 17 public void failure(RetrofitError error) { 18 mView.showError(error); 19 } 20 }); 21 } 22 } 6TFS1SFTFOUFS 6TFS7JFXJOUFSGBDFΛܦ༝ͯ͠7JFXͷߋ৽
1 public class UserActivity extends AppCompatActivity implements UserView { 2
@Override 3 protected void onCreate(Bundle savedInstanceState) { 4 int userId = ...; 5 UserPresenter presenter = new UserPresenter(this); 6 presenter.fetchUser(userId); 7 } 8 9 @Override 10 public void showName(String name) { 11 mTextView.setText(name); 12 } 13 14 @Override 15 public void showError(...) { ... } 16 } 7JFXͷߋ৽ 6TFS"DUJWJUZ
.717JFX͔Β ϓϨθϯςʔγϣϯϩδοΫΛग़དྷΔ
͜ΕͰϓϨθϯςʔγϣϯϩδοΫͷςε τ͕୯ମςετͰॻ͚Δͧʙ
Ͳ͏͍͏ςετʹͳΔͷ͔
1 public class UserPresenterTest { 2 @Test 3 public void
testFetchUser() throws Exception { 4 final AtomicBoolean called = new AtomicBoolean(); 5 mMockClient.mock("/v4/users/1.json").to(200, "user.json"); 6 7 class MockedView implements UserView { 8 @Override 9 public void showName(String name) { 10 called.set(true); 11 assertThat(name).isEqualTo("hisaichi5518"); 12 } 13 } 14 15 UserPresenter presenter = new UserPresenter(new MockedView()); 16 presenter.fetchUser(1); 17 assertThat(called.get()).isEqualTo(true); 18 } 19 } 7JFXͷߋ৽ JOUFSGBDFΛܦ༝ͯ͠ߦ͏
1 public class UserPresenterTest { 2 @Test 3 public void
testFetchUser() throws Exception { 4 final AtomicBoolean called = new AtomicBoolean(); 5 mMockClient.mock("/v4/users/1.json").to(200, "user.json"); 6 7 class MockedView implements UserView { 8 @Override 9 public void showName(String name) { 10 called.set(true); 11 assertThat(name).isEqualTo("hisaichi5518"); 12 } 13 } 14 15 UserPresenter presenter = new UserPresenter(new MockedView()); 16 presenter.fetchUser(1); 17 assertThat(called.get()).isEqualTo(true); 18 } 19 } JOUFSGBDFΛܧঝ͍ͯ͠Δ 7JFXͲ͖͑͋͞Ε 1SFTFOUFSͷςετͰ͖Δ
1 public class UserPresenterTest { 2 @Test 3 public void
testFetchUser() throws Exception { 4 final AtomicBoolean called = new AtomicBoolean(); 5 mMockClient.mock("/v4/users/1.json").to(200, "user.json"); 6 7 class MockedView implements UserView { 8 @Override 9 public void showName(String name) { 10 called.set(true); 11 assertThat(name).isEqualTo("hisaichi5518"); 12 } 13 } 14 15 UserPresenter presenter = new UserPresenter(new MockedView()); 16 presenter.fetchUser(1); 17 assertThat(called.get()).isEqualTo(true); 18 } 19 } 7JFXͲ͖
1 public class UserPresenterTest { 2 @Test 3 public void
testFetchUser() throws Exception { 4 final AtomicBoolean called = new AtomicBoolean(); 5 mMockClient.mock("/v4/users/1.json").to(200, "user.json"); 6 7 class MockedView implements UserView { 8 @Override 9 public void showName(String name) { 10 called.set(true); 11 assertThat(name).isEqualTo("hisaichi5518"); 12 } 13 } 14 15 UserPresenter presenter = new UserPresenter(new MockedView()); 16 presenter.fetchUser(1); 17 assertThat(called.get()).isEqualTo(true); 18 } 19 }
1 public class UserPresenterTest { 2 @Test 3 public void
testFetchUser() throws Exception { 4 final AtomicBoolean called = new AtomicBoolean(); 5 mMockClient.mock("/v4/users/1.json").to(200, "user.json"); 6 7 class MockedView implements UserView { 8 @Override 9 public void showName(String name) { 10 called.set(true); 11 assertThat(name).isEqualTo("hisaichi5518"); 12 } 13 } 14 15 UserPresenter presenter = new UserPresenter(new MockedView()); 16 presenter.fetchUser(1); 17 assertThat(called.get()).isEqualTo(true); 18 } 19 }
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Ұॹʹಇ͍ͯ͘Εʙʙʙ ࠷৽ͷ࠾༻ใΛνΣοΫˠ !QC@SFDSVJU