JMockit.pdf

Transcript

1. +.PDLJUษڧձ 
   5BLBIJSP
   4IJHFNPUP 
2. +.PDLJUษڧձ ໨࣍ w ϞοΫϥΠϒϥϦΛ࢖͏ཧ༝
   w +.PDLJUΛ࢖͏ཧ༝
   w +.PDLJU͕ఏڙ͢Δ"1*
   w ϏϔΠϏΞۦಈ։ൃςετ
   w ঢ়ଶϕʔεͷςετ
   w ελϒɺϑΣΠΫɺϞοΫɺεύΠ
   w έʔεผϞοΫͷར༻ํ๏
   w TUBUJDϝιουͷϞοΫ
   w QSJWBUFϝιουͷϞοΫ
   w ίϯετϥΫλͷϞοΫ
   w Ҿ਺ʹԠͨ͡ϞοΫಈ࡞ͷมߋ
   w ݺͼग़͠ճ਺ʹԠͨ͡ϞοΫಈ࡞ͷมߋ
   w ෦෼ϞοΫ
   w ࢀߟαΠτ౳ 
3. +.PDLJUษڧձ ϞοΫϥΠϒϥϦΛ࢖͏ཧ༝ʢ̍ʣ w ϞοΫΛ࢖ΘͣʹɺςετΫϥεʢ5FTU$BTFʣ͔ Βςετର৅ΫϥεΛݺͿͱɺςετର৅Ϋϥεͩ ͚Ͱͳ͘ɺґଘΫϥεʢ্هͷґଘΫϥε̍ɺґଘ Ϋϥε̎ʣ΋ςετ͢Δ͜ͱʹͳΔɻ ςετ
   Ϋϥε ςετ
   ର৅Ϋϥε ґଘ
   Ϋϥε̍ ґଘ
   Ϋϥε̎ ςετ ൣғ 
4. +.PDLJUษڧձ ϞοΫϥΠϒϥϦΛ࢖͏ཧ༝ʢ̎ʣ w ґଘΫϥεΛϞοΫԽ͢Δ͜ͱͰʢґଘΫϥεຊདྷ ͷಈ࡞Ͱ͸ͳ͘ɺࢦఆͨ͠ৼΔ෣͍Λͤ͞Δ͜ͱ ͰʣɺςετൣғΛςετର৅ΫϥεʹߜΔ͜ͱ͕ Ͱ͖Δɻʢςετର৅Ϋϥεͷιʔε͸มߋ͠ͳ͍ʣ ςετ
   Ϋϥε ςετ
   ର৅Ϋϥε ϞοΫԽ
   ґଘΫϥε̍ ϞοΫԽ
   ґଘΫϥε̎ ςετ ൣғ 
5. +.PDLJUษڧձ ϞοΫϥΠϒϥϦΛ࢖͏ཧ༝ʢ̏ʣ w 99-PHJDͷςετ͢ΔͨΊʹɺ%#ͷσʔλ༻ҙ͠ ͨΓɺ֎෦γεςϜͷηοτΞοϓΛ͠ͳ͚Ε͹ͳ Βͳ͍ɻ
 ςετͷ࣮ߦ͕஗͘ͳͬͨΓɺςετ͕ෆ҆ఆʹͳͬ ͨΓɺฒྻ࣮ߦΛ๦͛ͨΓ͢Δɻ
 ˠϞοΫԽ͢Δ͜ͱͰղܾʂ 99-PHJD5FTU 99-PHJD 99%BP 994FSWJDF %# ֎෦γεςϜ 
6. +.PDLJUษڧձ +.PDLJUΛ࢖͏ཧ༝ʢ̍ʣ w ैདྷͷϞοΫϥΠϒϥϦͷ໰୊
   w ͜Ε·ͰͷϞοΫϥΠϒϥϦʢ&BTZ.PDLɺK.PDLɺ .PDLJUPɺ6OJUJMT
   .PDLͳͲʣͰ͸ɺҎԼͷ΋ͷΛϞο ΫͰ͖ͳ͔͕ͬͨɺ+.PDLJUͰ͸ग़དྷΔΑ͏ʹͳͬͨɻ
   w QSJWBUFpOBMTUBUJDϝιου
   w ςετର৅Ϋϥε͔ΒɺOFXͰੜ੒ͨ͠ґଘΫϥε
   w ͔͠͠ɺ1PXFS.PDL
   ʴʢ&BTZ.PDL
   c
   .PDLJUPʣͰग़ དྷΔΑ͏ʹͳͬͨɻ
   w ˠػೳͷ๛෋͞ͱ୯ҰKBSͰग़དྷΔ؆ܿ͞ʹɺ+.PDLJU ͷ༏Ґੑ͕͋Δ͔ɻ 
7. +.PDLJUษڧձ +.PDLJUΛ࢖͏ཧ༝ʢ̎ʣ w +.PDLJUαΠτ.PDLJOH
   5PPMLJU
   $PNQBSJTPO
   .BUSJYΑΓ 
8. +.PDLJUษڧձ +.PDLJU͕ఏڙ͢Δ"1* w +.PDLJU͸ೋͭͷϞοΫ"1*Λఏڙ͢Δɻ
   w ̍ɽ&YQFDUBUJPOT"1*
   w #%%ʢϏϔΠϏΞۦಈ։ൃʣςετ༻
   w ςετର৅ΦϒδΣΫτͷৼΔ෣͍ʢϝιουʣ Λςετ
   w ̎ɽ.PDLVQT"1*
   w ঢ়ଶϕʔεςετͱϑΣΠΫ࣮૷༻
   w େ൒ͷέʔε͸&YQFDUBUJPOT"1*Ͱॻ͘͜ͱ͕ग़དྷΔ͕ɺ .PDLVQT"1*Ͱิ׬͢Δඞཁ͕͋Δέʔε΋͋Δɻ 
9. +.PDLJUษڧձ ϏϔΠϏΞۦಈ։ൃςετʢ̍ʣ w ϏϔΠϏΞۦಈ։ൃςετ͸ɺҎԼͷϑΣʔζͰ࣮ߦ͞Ε Δɻ
   w ४උ "SSBOHF ʗ࣮ߦ "DU ʗݕূ "TTFSU Λ
 ʢظ଴͢ΔґଘΫϥεͷৼΔ෣͍ͷʣه࿥ʗϦϓϨΠʗݕ ূͱ΋ݴ͏ɻ @Test public void someTestMethod() { // 1. ४උɿςετର৅ΫϥεΛ࣮ߦՄೳʹ͢ΔͷʹඞཁͳԿ͔ɻ ... // 2. ࣮ߦɿ௨ৗɺpublicϝιουΛݺͿࣄʹΑͬͯɺςετର৅Ϋϥε͕࣮ߦ͞ΕΔɻ ... // 3. ݕূɿςετର৅Ϋϥε͕࣮ߦͨ͜͠ͱΛ֬ೝ͢ΔͨΊʹɺνΣοΫ͢Δඞཁͷ͋ΔԿ͔ɻ ... } 
10. +.PDLJUษڧձ ϏϔΠϏΞۦಈ։ൃςετʢ̎ʣ w ϏϔΠϏΞۦಈ։ൃςετͷྫ public class XXDao { public String getXX() { return "XX"; } } public class XXLogic { public String getXX() { XXDao dao = new XXDao(); return dao.getXX(); } } 99-PHJD 99%BP 99-PHJD͸ 99%BPʹґଘ 
11. +.PDLJUษڧձ ϏϔΠϏΞۦಈ։ൃςετʢ̏ʣ w ϏϔΠϏΞۦಈ։ൃςετͷྫ @Test public void testGetXX(@Mocked XXDao dao) { // ه࿥ϑΣʔζ String expectedResult = "YY"; new Expectations() {{ dao.getXX(); result = expectedResult; }}; // ϦϓϨΠϑΣʔζ XXLogic logic = new XXLogic(); String result = logic.getXX(); // ݕূϑΣʔζ new Verifications() {{ // dao#getXX()͸1ճ͚ͩݺ͹Εͨ dao.getXX(); minTimes = 1; maxTimes = 1; }}; assertThat(result, is(expectedResult)); } ͜ͷςετέʔεͷൣғͰ༗ ޮͳϞοΫΦϒδΣΫτ ʻه࿥ϑΣʔζʼ
    ґଘΫϥε99%BPͷɺ͜ͷς ετʹ͓͚Δ๬·͍͠ৼΔ෣͍ Λه࿥ ʻϦϓϨΠϑΣʔζʼ
    ςετର৅ΫϥεͷQVCMJDϝ ιουΛݺͼग़࣮ͯ͠ߦ͢Δ ʻݕূϑΣʔζʼ
    ҎԼೋ఺Λ֬ೝ͢Δɻ
    ɾϞοΫΦϒδΣΫτʢґଘΫ ϥεʣ͕ظ଴௨Γಈ࡞͔ͨ͠
    ɾςετର৅Ϋϥε͕ظ଴௨Γ ͷ݁ՌΛฦ͔ͨ͠ 
12. +.PDLJUษڧձ ঢ়ଶϕʔεςετʢ̍ʣ w ঢ়ଶϕʔεςετ͸ɺςετର৅Ϋϥεͱґଘؔ܎ ͷ΍ΓͱΓͰ͸ͳ͘ɺґଘؔ܎͔Βฦ͞ΕΔσʔλ ʹண໨ͨ͠ςετɻ
 ʢঢ়ଶભҠΛ໢ཏ͢Δςετͷ͜ͱͰ͸ͳ͍Β͍͠ʣ ςετ
    Ϋϥε ςετ
    ର৅Ϋϥε ϞοΫԽ
    ґଘΫϥε̍ ϞοΫԽ
    ґଘΫϥε̎ ґଘΫϥεʹ౉͞Ε Δύϥϝʔλ΍໭Γ஋ ʹ஫໨͢Δςετ 
13. +.PDLJUษڧձ ঢ়ଶϕʔεςετʢ̎ʣ w ঢ়ଶϕʔεςετͷྫ import java.io.IOException; import java.net.Socket; public class SocketClient { public Socket connect(String host, int port) throws IOException { Socket s = new Socket(host, port); return s; } } 4PDLFU
    $MJFOU 4PDLFU 4PDLFU$MJFOU͸ 4PDLFUʹґଘ 
14. +.PDLJUษڧձ ঢ়ଶϕʔεςετʢ̏ʣ w ঢ়ଶϕʔεςετͷྫ @Test public void testConnect() { // ه࿥ϑΣʔζ String expectedHost = "test.example.com"; int expectedPort = 1234; new MockUp<Socket>() { @Mock void $init(String host, int port) { assertThat(host, is(expectedHost)); assertThat(port, is(expectedPort)); } }; // ϦϓϨΠϑΣʔζ try { Socket s = new SocketClient().connect(expectedHost, expectedPort); } catch(IOException e) { fail(e.getMessage()); } } ϞοΫΦϒδΣΫτʢґଘΫ ϥεʀ4PDLFUʣʹਖ਼͍͠ύϥ ϝʔλ͕౉͞Ε͔ͨݕূ͢Δ  .PDLVQT"1*ͷ৔߹͸ɺ .PDL6QΫϥεΛOFXͨ͠ͱ͜ ΖͰϞοΫ͕༗ޮʹͳΔ
15. +.PDLJUษڧձ ελϒɺϑΣΠΫɺϞοΫɺεύΠʢ̍ʣ w ૯শͯ͠ςετμϒϧͱ͍͏ɻ
 IUUQKBXJLJQFEJBPSHXJLJςετμϒϧ આ໌ ελϒ ςετର৅ʹʮؒ઀తͳೖྗʯΛఏڙ͢ΔͨΊʹ࢖͏
    ˠఆ਺Λฦ͢ͳͲɺݺͼग़͠ݩʹԠͨ͡୯७ͳ࣮૷Λఏڙ͢Δ ϑΣΠΫ ࣮ࡍͷΦϒδΣΫτʹ͍ۙಇ͖Λ͢Δ͕ɺΑΓ୯७ͳ࣮૷Λ࢖͏
    ࣮ࡍͷσʔλϕʔεΛஔ͖׵͑ΔΠϯϝϞϦσʔλϕʔεͳͲ
    ˠελϒͷҰछ͕ͩɺΑΓߴ౓ͳʢͨͩ͠ຊ൪ίʔυΑΓ͸୯७ͳʣ࣮૷Λఏڙ͢Δ ϞοΫ ςετର৅͔Βͷʮؒ઀తͳग़ྗʯΛݕূ͢ΔͨΊʹ࢖͏
    ςετίʔυͷ࣮ߦલʹɺ͋Β͔͡Ίظ଴͢Δ݁ՌΛઃఆ͓ͯ͘͠
    ˠελϒͷҰछ͕ͩɺݺͼग़͠ݩ͕ਖ਼͘͠ԼҐϞδϡʔϧΛར༻͍ͯ͠Δ͜ͱΛݕূ͢Δ εύΠ ςετର৅͔Βͷʮؒ઀తͳग़ྗʯΛݕূ͢ΔͨΊʹ࢖͏
    ग़ྗΛه࿥͓ͯ͘͜͠ͱͰɺςετίʔυͷ࣮ߦޙʹɺ஋ΛऔΓग़ͯ͠ݕূͰ͖Δ
    ˠݺͼग़͠ݩͱԼҐϞδϡʔϧͷؒʹೖͬͯɺ஋Λऔಘ͠ɺݕূ͢Δ 
16. +.PDLJUษڧձ ελϒɺϑΣΠΫɺϞοΫɺεύΠʢ̎ʣ w ϑΣΠΫͷྫ @Test public void testConnectFail(@Mocked Socket socket) throws IOException { // ه࿥ϑΣʔζ String expectedHost = "test.example.com"; int expectedPort = 1234; new Expectations() {{ new Socket(anyString, anyInt); result = new IOException("mockedConstructor"); }}; // ϦϓϨΠϑΣʔζ try { Socket s = new SocketClient().connect(expectedHost, expectedPort); fail(); } catch(IOException e) { // ྫ֎͕εϩʔ͞ΕΔ͜ͱΛظ଴ } } 4PDLFU઀ଓΤϥʔ͕ى͜ΔΑ ͏ɺϞοΫʢϑΣΠΫʣΛઃఆ ͢Δ 
17. +.PDLJUษڧձ ελϒɺϑΣΠΫɺϞοΫɺεύΠʢ̏ʣ w εύΠͷྫ @Test public void testConnectSpy() { // ه࿥ϑΣʔζ String expectedHost = "www.yahoo.co.jp"; int expectedPort = 80; new MockUp<Socket>() { @Mock void close(Invocation invocation) throws IOException { // Ҿ਺Λίϯιʔϧʹग़ྗ System.out.println("close method invoked."); // ຊ෺ͷϝιουΛݺͿ invocation.proceed(); } }; // ϦϓϨΠϑΣʔζ try { Socket s = new SocketClient().connect(expectedHost, expectedPort); s.close(); } catch(IOException e) { fail(); DMPTFϝιου͕ݺ͹Εͨͱ͖ ʹɺίϯιʔϧʹϝοηʔδΛग़ ͯ͠ɺຊ෺ͷϝιουΛݺͿɻ 
18. +.PDLJUษڧձ έʔεผ
    ϞοΫͷར༻ํ๏ 
19. +.PDLJUษڧձ TUBUJDϝιουͷϞοΫ w ςετର৅Ϋϥε
    w ςετΫϥε @Test public void testStaticMethod(@Mocked StaticMethod staticMethod) { // ه࿥ϑΣʔζ String expectedResult = "mockedResult"; new Expectations() {{ StaticMethod.staticMethod(); result = expectedResult; }}; // ϦϓϨΠϑΣʔζ String result = StaticMethod.staticMethod(); // ݕূϑΣʔζ assertThat(result, is(expectedResult)); } public static String staticMethod() { return "abc"; } ΠϯελϯεϝιουͷϞοΫ ͱಉ͡΍Γํ 
20. +.PDLJUษڧձ QSJWBUFϝιουͷϞοΫʢ̍ʣ w ςετର৅Ϋϥε public class PrivateMethod { private PrivateMethod() { } private final int privateMethod() { return 10; } private static final int privateStaticMethod() { return 20; } } 
21. +.PDLJUษڧձ QSJWBUFϝιουͷϞοΫʢ̎ʣ w ςετΫϥε @Test public void testPrivateMethod(@Mocked PrivateMethod target) { // ه࿥ϑΣʔζ int expectedPrivateMethodResult = 11; int expectedPrivateStaticMethodResult = 21; new Expectations() {{ Deencapsulation.invoke(target, "privateMethod"); result = expectedPrivateMethodResult; Deencapsulation.invoke(PrivateMethod.class, "privateStaticMethod"); result = expectedPrivateStaticMethodResult; }}; // ϦϓϨΠϑΣʔζ PrivateMethod tested = Deencapsulation.newInstance(PrivateMethod.class); int privateMethodResult = Deencapsulation.invoke(tested, "privateMethod"); int privateStaticMethodResult = Deencapsulation.invoke(tested, "privateStaticMethod"); // ݕূϑΣʔζ assertThat(privateMethodResult, is(expectedPrivateMethodResult)); assertThat(privateStaticMethodResult, is(expectedPrivateStaticMethodResult)); } 
22. +.PDLJUษڧձ ίϯετϥΫλͷϞοΫʢ̍ʣ w ςετΫϥε @Test public void testGetCurrentDate() { // ظ଴஋͸2015/05/05 Calendar c = Calendar.getInstance(); c.set(2015, 4, 5); Date expected = c.getTime(); // ه࿥ϑΣʔζ new MockUp<Date>() { @Mock public void $init() { this.getMockInstance().setTime(expected.getTime()); } }; // ϦϓϨΠϑΣʔζ String strDate = DateUtil.getCurrentDate(); // ݕূϑΣʔζ assertThat(strDate, is("2015/05/05")); } ίϯετϥΫλͷڍಈΛม͑Δ ʹ͸ɺ.PDLVQT"1*͕ඞཁɻ
    ʢྫ֎Λ౤͛Δ͚ͩͳΒɺ &YQFDUBUJPOT"1*Ͱ΋Մʣ 
23. +.PDLJUษڧձ ίϯετϥΫλͷϞοΫʢ̎ʣ w ίϯετϥΫλͷεύΠʢϥούʔΛඃͤΔʣ public static Date getDateInstance() { return new Date(); } public static Date getDateInstance(long time) { return new Date(time); } @Test public void testConstructor2() throws IOException { // ه࿥ϑΣʔζ new MockUp<DateWrapper>() { @Mock Date getDateInstance(Invocation inv) { System.out.println("getDateInstance"); return inv.proceed(); } @Mock Date getDateInstance(Invocation inv, long time) { System.out.println("getDateInstance(" + time + ")"); return inv.proceed(); } }; JOJUͰQSPDFFEͯ͠΋ಈ࡞͠ͳ ͍Β͍͠ɻɻ 
24. +.PDLJUษڧձ Ҿ਺ʹԠͨ͡ϞοΫಈ࡞ͷมߋʢ̍ʣ w ςετΫϥε @Test public void testSystemGetProperties(@Mocked System system) { // ه࿥ϑΣʔζ new Expectations() {{ System.getProperty("os.name"); result = "Mocked os.name"; System.getProperty("user.name"); result = "Mocked user.name"; }}; // ϦϓϨΠϑΣʔζ String osName = System.getProperty("os.name"); String userName = System.getProperty("user.name"); // ݕূϑΣʔζ assertThat(osName, is("Mocked os.name")); assertThat(userName, is("Mocked user.name")); } ಉ͡4ZTUFNHFU1SPQFSUZϝ ιουʹରͯ͠ɺҾ਺ʹԠͨ͡Ϟο Ϋಈ࡞Λఆ͍ٛͯ͠Δɻ 
25. +.PDLJUษڧձ Ҿ਺ʹԠͨ͡ϞοΫಈ࡞ͷมߋʢ̎ʣ w Ҿ਺ͷϚονʹ࢖͑Δఆ਺ ܕ ఆ਺ 0CKFDU BOZ #PPMFBO BOZ#PPMFBO #ZUF BOZ#ZUF $IBSBDUFS BOZ$IBS %PVCMF BOZ%PVCMF 'MPBU BOZ'MPBU *OUFHFS BOZ*OU -POH BOZ-POH 4IPSU BOZ4IPSU 4USJOH BOZ4USJOH
    
26. +.PDLJUษڧձ ݺͼग़͠ճ਺ʹԠͨ͡ϞοΫಈ࡞ͷมߋʢ̍ʣ w ݺͼग़͠ճ਺Ͱ໭Γ஋ͷ੾Γସ͑ @Test public void testSystemGetProperties(@Mocked System system) { // ه࿥ϑΣʔζ new Expectations() {{ System.getProperty("os.name"); returns("Mocked os.name", "Mocked os.name2"); }}; // ϦϓϨΠϑΣʔζ String osName = System.getProperty("os.name"); String osName2 = System.getProperty("os.name"); String osName3 = System.getProperty("os.name"); // ݕূϑΣʔζ assertThat(osName, is("Mocked os.name")); assertThat(osName2, is("Mocked os.name2")); assertThat(osName3, is("Mocked os.name2")); } SFUVSOTΛ࢖͏͜ͱͰɺݺͼग़͠ ճ਺ʹԠͨ݁͡ՌΛฦͤΔ
    ʢճ໨Ҏ߱͸ճ໨ͱಉ͡ʣ 
27. +.PDLJUษڧձ ݺͼग़͠ճ਺ʹԠͨ͡ϞοΫಈ࡞ͷมߋʢ̎ʣ w ݺͼग़͠ճ਺ͰϞοΫʗϦΞϧͷ੾Γସ͑ @Test public void testSystemGetPropertiesMockupAPI() { String realOsName = System.getProperty("os.name"); // ه࿥ϑΣʔζ new MockUp<System>() { @Mock String getProperty(Invocation inv, String key) { if(inv.getInvocationCount() < 2) { return "Mocked property"; } else { return inv.proceed(); } } }; // ϦϓϨΠϑΣʔζ String osName = System.getProperty("os.name"); String osName2 = System.getProperty("os.name"); // ݕূϑΣʔζ assertThat(osName, is("Mocked property")); assertThat(osName2, is(realOsName)); } ճ໨·Ͱ͸ϞοΫͨ݁͠Ռɺ ճ໨Ҏ߱͸ϦΞϧϝιουͷ݁Ռ Λฦ͢ɻ
    ˞*OWPDBUJPO͸൪໨ͷҾ਺ʹ͢ Δඞཁ͕͋Δɻ
    ˞ޙड़ͷҾ਺ʹΑͬͯϞοΫʗϦ ΞϧΛݺͼ෼͚Δํ๏Λ૊Έ߹Θ ͤΔ͜ͱ΋Մೳ 
28. +.PDLJUษڧձ ෦෼ϞοΫʢ̍ʣ w ϝιου୯ҐͰϞοΫʗϦΞϧͷ੾Γସ͑ @Test public void testPartialMock(@Mocked("getProperty") System system) { // ه࿥ϑΣʔζ new Expectations() {{ System.getProperty(“os.name"); result = "Mocked os.name"; }}; // ϦϓϨΠϑΣʔζ String osName = System.getProperty("os.name"); String realOsName = System.getProperties().getProperty("os.name"); // ݕূϑΣʔζ assertThat(osName, is("Mocked os.name")); System.out.println(realOsName); } HFU1SPQFSUZϝιουͷΈϞο Ϋ͞ΕΔɻͦΕҎ֎ͷϝιου͸ ϦΞϧϝιου͕ݺ͹ΕΔɻ 
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