まだまだ間に合うJUnit(再)入門 #jjug_ccc #ccc_g4

Transcript

1. ·ͩ·ͩؒʹ߹͏
   +6OJU ࠶
   ೖ໳
   ࢁຊϢʔεέ
   KKVH@DDDDDD@H
   

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2. ࢁຊϢʔεέ!ZVTVLF
   w+BWBνϟϯϐΦϯ
   w%VLFT$IPJDF"XBSEड৆
   

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3. ྑ͋͘Δ։ൃ޻ఔ
   ઃܭ ࣮૷ ςετ σόοά ӡ༻
   ཁ݅ఆٛ
   

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4. ։ൃͷ࣮ࡍ
   Yʙ㱣
   ઃܭ ࣮૷ ςετ σόοά ӡ༻
   ཁ݅ఆٛ
   

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5. ʮςετ޻ఔʯͷ໰୊
   w ਓ͕ؒߦ͏ςετͷ৴པੑ
   w ίετɺ࣌ؒͷ੍ݶ͔Βճؼςετ͕೉͍͠
   w σόοά׬ྃΛ։ൃऀ͕֬ೝ͠ͳ͍
   w όάΛࢦఠ͞ΕΔ৺ཧతμϝʔδ
   w ςετ޻ఔཁһͷͨΊʹόάΛ࢒͢ʜʁ
   

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6. ςετΛࣗಈԽ
   w ਓؒΑΓ΋ߴ͍৴པੑ৴པੑ
   w ճؼςετΛݱ࣮తͳίετͰ࣮ݱՄ
   ೳ
   w σόοά׬ྃΛ࣮૷࣌ʹ֬ೝ
   w σόοάָ͕͘͠ͳΔ
   

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7. +6OJUͱ͸
   wUIFQSPHSBNNFSGSJFOEMZUFTUJOH
   GSBNFXPSLGPS+BWB
   wʮ+BWB޲͚ͷϓϩάϥϚϑϨϯυϦͳ
   ςετϑϨʔϜϫʔΫʯ
   IUUQTKVOJUPSHKVOJU
   

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8. +6OJUͱ͸
   w+BWBίʔυͷςετΛ؆୯ʹ͢Δϑ
   ϨʔϜϫʔΫ
   +BWB +6OJUɺ5FTU/(
   1ZUIPO VOJUUFTU
   1)1 1)16OJU
   3VCZ UFTUVOJUɺ34QFD
   $ /6OJUɺ.45FTU
   ओཁݴޠͷςετϑϨʔϜϫʔΫ
   

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9. ࠓճͷςετର৅'J[[#V[[
   w ʙ·Ͱͷ਺ࣈʹ͍ͭͯʜ
   w ͷഒ਺ͷ৔߹'J[[ΛϓϦϯτ
   w ͷഒ਺#V[[ΛϓϦϯτ
   w ͲͪΒͰ΋ͳ͍৔߹਺ࣈΛϓϦϯτ
   

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10. ࠓճͷςετର৅'J[[#V[[
    public class FizzBuzz {
    public static void main(String[] args){
    for(int i=0;i<100;i++){
    System.out.println(fizzBuzz(i));
    }
    }
    public static String fizzBuzz(int number) {
    // ͜͜Λ࣮૷
    }
    }
    

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11. ࠷খݶͷ+6OJUςετ
    import org.junit.jupiter.api.Test;
    import static org.junit.jupiter.api.Assertions.*;
    class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    }
    }
    

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12. import org.junit.jupiter.api.Test;
    import static org.junit.jupiter.api.Assertions.*;
    class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    }
    }
    Ξϊςʔγϣϯ
    Ξαʔγϣϯϝιου
    +6OJUςετͷେࣄͳೋཁૉ
    

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13. import org.junit.jupiter.api.Test;
    import static org.junit.jupiter.api.Assertions.*;
    class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    }
    }
    @TestΞϊςʔγϣϯ
    ςετΛߦ͏ϝιουͩͱએݴ
    

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14. import org.junit.jupiter.api.Test;
    import static org.junit.jupiter.api.Assertions.*;
    class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    }
    }
    assertEquals(a, b)
    b͕aͱ౳͍͜͠ͱΛओு
    

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15. όά͍ͬͯΔ࣮૷
    public class FizzBuzz {
    public static void main(String[] args){
    for(int i=0; i<100; i++){
    System.out.println(fizzBuzz(i));
    }
    }
    public static String fizzBuzz(int number) {
    return "Fizz";
    }
    }
    p[[#V[[͕'J[[͔͠ฦ͞ͳ͍
    
    

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16. όά͍ͬͯΔ࣮૷ͷ+6OJU࣮ߦ݁Ռ
    

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17. όά͍ͬͯΔ࣮૷ͷ+6OJU࣮ߦ݁Ռ
    IDEͰςετ࣮ߦɺࣦഊͨ͠ςετΛҰཡ
    

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18. +6OJU࣮ߦ݁Ռ
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    

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19. ςετΛॆ࣮ͤ͞Δ
    class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(45));
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(60));
    }
    @Test void fizz {}
    @Test void buzz {}
    @Test void number {}
    }
    

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20. class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(45));
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(60));
    }
    @Test void fizz {}
    @Test void buzz {}
    @Test void number {}
    }
    ςετΛॆ࣮ͤ͞Δ
    ςετύλʔϯΛ૿΍͢ͱ඼࣭͕޲্
    ςετϝιου͸Կݸ͋ͬͯ΋ྑ͍
    Ξαʔγϣϯ͸Կݸ͋ͬͯ΋ྑ͍
    

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21. class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(45));
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(60));
    }
    @Test void fizz {}
    @Test void buzz {}
    @Test void number {}
    }
    ςετΛॆ࣮ͤ͞Δ
    ςετύλʔϯΛ૿΍͢ͱ඼࣭͕޲্
    ςετϝιου͸Կݸ͋ͬͯ΋ྑ͍
    Ξαʔγϣϯ͸Կݸ͋ͬͯ΋ྑ͍
    assertϝιουͰ࠷ॳʹࣦഊͨ͠
    ͱ͜ΖͰςετϝιουͷ࣮ߦ͸ఀࢭ
    

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22. ϓϩδΣΫτʹ͓͚Δ+6OJUͷઃఆ
    

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23. .BWFOͷ৔߹
    w QPNYNMʹґଘΛهड़
    

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24. (SBEMFͷ৔߹
    w CVJMEHSBEMFʹґଘΛهड़
    

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25. +6OJUςετͷ࣮ߦํ๏
    

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26. +6OJUςετͷ࣮ߦ
    w *%&͔Β
    w ίϚϯυϥΠϯ͔Β
    w $*αʔό͔Β
    

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27. +6OJUςετͷ࣮ߦ*%&͔Β
    w ࠷΋Ұൠత
    w ଟ͘ͷ*%&Ͱ͸(6*Ͱ࣮ߦՄೳ
    

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28. +6OJUςετͷ࣮ߦίϚϯυϥΠϯ͔Β
    w .BWFO΍(SBEMFΛ࢖͏
    NWOUFTU
    HSBEMFUFTU
    

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29. ୅දతͳΞαʔγϣϯϝιου
    w BTTFSU&RVBMT B C
    BͱC͕౳͍͠
    w BTTFSU5SVF B
    B͕USVF
    w BTTFSU'BMTF B
    B͕GBMTF
    w BTTFSU/VMM B
    B͕OVMM
    w BTTFSU/PU/VMM B
    B͕OVMMͰͳ͍
    

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30. ୅දతͳΞϊςʔγϣϯ
    w !5FTUςετϝιουͷϚʔΫ
    ຖςετϝιουલޙʹॲཧ
    w !#FGPSF&BDI֤ςετͷલʹॲཧ
    w !"GUFS&BDI֤ςετͷޙʹॲཧ
    ΫϥεͰҰ౓͚ͩॳظԽޙॲཧ
    w !#FGPSF"MMશςετͷલʹॲཧ
    w !"GUFS"MMશςετͷޙʹॲཧ
    

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31. σϞ
    

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32. Ҏલͷόʔδϣϯͷ+6OJU
    

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33. +6OJUͷόʔδϣϯ
    w +6OJUY޿͘ීٴ
    w +6OJUYΞϊςʔγϣϯಋೖ
    w +6OJUYϥϜμࣜಋೖ
    

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34. +VOJUYͱ+6OJUYͷҧ͍
    

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35. +VOJUY
    w Ξϊςʔγϣϯ͕Ұ෦ҧ͏
    w ςετΫϥεɺϝιου͸QVCMJD
    w )BNDSFTU BTTFSU5IBU
    Ϛονϟʔ͕ಉࠝ
    

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36. +6OJUYͱ+6OJUY
    +6OJUY +6OJUY
    !#FGPSF !#FBGPSF&BDI
    !"GUFS !"GUFS&BDI
    !#FGPSF$MBTT !#FGPSF"MM
    !"GUFS$MBTT !"GUFS"MM
    Ξϊςʔγϣϯͷҧ͍
    

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37. +6OJUYͱ+6OJUY
    IBNDSFTUΞαʔγϣϯ
    assertThat(a, equalTo(b));
    assertEquals(b, a);
    JUnit 5Ͱ΋ґଘΛ௥Ճ͢Ε͹hamcrest͸ར༻Մೳ
    JUnit 4.x
    JUnit 5.x
    JUnit 4.xͰ΋assertEqualsͳͲ͸ඪ४Ͱར༻Մೳ
    

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38. class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    }
    }
    public class FizzBuzzTest {
    @Test
    public void fizzBuzz {
    assertThat(FizzBuzz.fizzBuzz(15), equalTo("FizzBuzz"));
    }
    }
    JUnit 4.x
    JUnit 5.x
    

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39. +VOJUYͱ+6OJUYͷҧ͍
    

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40. +VOJUY
    w Ξϊςʔγϣϯ͕ͳ͍
    w ςετΫϥε͸5FTU$BTFΛܧঝ
    w ςετϝιου͸UFTUͰ࢝ΊΔ
    w ςετΫϥεɺϝιου͸QVCMJD
    

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41. import org.junit.jupiter.api.Test;
    import static org.junit.jupiter.api.Assertions.*;
    class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    }
    }
    import junit.framework.TestCase;
    public class FizzBuzzTest extends TestCase {
    public void testFizzBuzz {
    assertEquals("FizzBuzz",FizzBuzz.fizzBuzz(15));
    }
    }
    JUnit 3.x
    JUnit 5.x
    

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42. ςετͷίπ
    

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43. ςετͷίπ
    ςετΛઌʹॻ͘
    

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44. ςετΛઌʹॻ͘
    w ςετࣦഊΛ֬ೝ͔ͯ͠Β࣮૷
    

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45. ςετΛઌʹॻ͘
    w ςετࣦഊΛ֬ೝ͔ͯ͠Β࣮૷
    ޙ͔ΒςετΛॻ͘ͱ࣮૷಺༰ʹؔΘΒͣ
    ੒ޭ͢Δςετʹͳͬͯ͠·͏͜ͱ͕ɾɾɾ
    

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46. TDD: Test Driven Development
    Test Early
    Fail Fast
    

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47. ςετͷίπ
    ෼͔Γ΍͍͢
    ςετϝιου໊
    

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48. ෼͔Γ΍͍͢ςετϝιου໊
    @Test
    void orderInfo1 {…}
    @Test
    void orderInfo2 {…}
    ςετ಺༰͕෼͔Βͳ͍ςετϝιου໊
    

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49. ෼͔Γ΍͍͢ςετϝιου໊
    @Test
    void ड஫લʹ੥ٻঢ়ଶʹ͸ભҠͰ͖ͳ͍ {…}
    @Test
    void લ෷͍ͷ͓٬༷ʹ͸੥ٻॻͰ͸ͳ͘ೲ඼ॻΛൃߦ {…}
    @Test
    void orderInfo1 {…}
    @Test
    void orderInfo2 {…}
    ςετ಺༰͕෼͔Βͳ͍ςετϝιου໊
    ςετ಺༰͕ࣗ໌ͳςετϝιου໊
    

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50. @Test
    void ड஫લʹ੥ٻঢ়ଶʹ͸ભҠͰ͖ͳ͍ {…}
    @Test
    void લ෷͍ͷ͓٬༷ʹ͸੥ٻॻͰ͸ͳ͘ೲ඼ॻΛൃߦ {…}
    @Test
    void orderInfo1 {…}
    @Test
    void orderInfo2 {…}
    ςετ಺༰͕෼͔Βͳ͍ςετϝιου໊
    ςετ಺༰͕ࣗ໌ͳςετϝιου໊
    ෼͔Γ΍͍͢ςετϝιου໊
    ϓϩδΣΫτϝϯόʔશһ೔ຊޠʹתೳͰ͋
    Ε͹ϝιου໊͸೔ຊޠͰ΋OK
    

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51. ςετͷίπ
    ςετϝιου಺ʹ
    BTTFSUJPOΛॻ͖͗͢ͳ͍
    

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52. ϝιου಺ʹBTTFSUJPOΛॻ͖͗͢ͳ͍
    w ΄Ͳ΄Ͳʹ·ͱ·ͬͨ୯ҐͰ
    w ඞཁʹԠͯ͡BTTFSU"MMΛར༻
    

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53. BTTFSU"MM
    import static FizzBuzz.*
    class FizzBuzzTest {
    @Test
    void fizzBuzz {
    assertAll(
    () -> assertEquals("Fizz", fizzBuzz(3)),
    () -> assertEquals("Buzz", fizzBuzz(5)),
    () -> assertEquals("7", fizzBuzz(7)),
    () -> assertEquals("FizzBuzz", fizzBuzz(15))
    );
    }
    ϥϜμࣜΛ࢖ͬͯ·ͱΊͯݕূ
    ࣦഊ͢ΔΞαʔγϣϯ͕͋ͬͯ΋શͯݕূ
    

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54. BTTFSU"MM
    assertAll಺ͷࣦഊͨ͠assertશ͕ͯใࠂ͞ΕΔ
    

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55. ςετͷίπ̐
    ΧόϨοδʢ໢ཏ౓ʣ
    ʹͩ͜ΘΓ͗͢ͳ͍
    

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56. ΧόϨοδʹͩ͜ΘΓ͗͢ͳ͍
    w ΧόϨοδ࣮ߦՄೳͳߦͷ͏ͪɺςε
    τΛ࣮ࢪͨ͠ߦͷׂ߹
    w *%&΍$*ͰଌఆՄೳ
    w HFUUFSTFUUFSͷςετ͸ෆཁ
    w ࣮ূࡁΈίʔυ ஶ໊ϥΠϒϥϦͳͲ
    ͷ
    ڍಈ͸ςετ͠ͳ͍
    

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57. ςετΛ༏ઌతʹॻ͘΂͖ର৅
    w ࣮૷͕ෆ҆ͳՕॴ
    w όάɺϦάϨογϣϯ͕ൃੜ͠
    ͦ͏ͳՕॴ
    w ϦϑΝΫλϦϯάΛࢪ͢Օॴ
    

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58. QSJWBUFϝιουͷςετ͸ʁ
    w QBDLBHFQSJWBUFʹ
    w ޡ༻͕৺഑ͳ৔߹͸ίϝϯτ
    

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59. ςετΛ࢝ΊΑ͏
    

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60. ςετΛ࢝ΊΔ
    w खಈςετ͕ඪ४ͳͷͰ೉͍͠ʁ
    

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61. ςετΛ࢝ΊΔ
    w खಈςετ͕ඪ४ͳͷͰ೉͍͠ʁ
    w ̍ਓͰ΋࢝ΊΒΕ·͢
    

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62. ςετΛ࢝ΊΔ
    w ςετΛॻ͘෼༨ܭʹ͕͔͔࣌ؒΔͷͰ͸ʁ
    

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63. ςετΛ࢝ΊΔ
    w ςετΛॻ͘෼༨ܭʹ͕͔͔࣌ؒΔͷͰ͸ʁ
    w Ή͠Ζૣ͘ͳΓ·͢
    

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64. ςετ͕श׳Խͨ͠Β
    

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65. $* $POUJOVPVT*OUFHSBUJPO
    
    w +FOLJOTɺ$JSDMF$*ɺ5FBN$JUZ
    w ςετ࣮ߦΛࣗಈԽ
    w ςετ࣮ߦͷ࿙Ε͕ͳ͘ͳΔ
    w ςετ׬ྃΛ଴ͨͣʹผͷ࡞ۀ͕Ͱ͖Δ
    

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66. 4FMFOJVN
    w ϩδοΫ͚ͩͰͳ͘ɺ8FCΞϓϦέʔγϣϯ
    ͷૢ࡞΋ςετՄೳ
    w ϑΥʔϜೖྗ
    w εΫϦʔϯγϣοτ
    

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67. ࣭໰ʁ
    

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68. ͋Γ͕ͱ͏͍͟͝·ͨ͠
    

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