JUnit 5の拡張機能を完全にマスターした

by irof

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+6OJUͷ֦ுػೳΛ ׬શʹϚελʔͨ͌͠ 5 ؔδϟό݄౓!JSPG #PU8͸%ਲ͍Ͱ·ͩΫϦΞͰ͖ͯͳ͍ɻ

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͓඼ॻ͖ ࠷ۙͷ+6OJU &YUFOTJPOͷ۩ମྫ &YUFOTJPOͷԼࢧ͑ &YUFOTJPOͷ࡞Γํ

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͝஫ҙ +6OJU ਤ͸*OUFSOBM΍&YQFSJNFOUBMͳ ͲΛؚΈ·͢ɻ

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࠷ۙͷ+6OJU ϦϦʔε௚ޙͷػೳෆ଍ظ͸ൈ͚ɺ ػೳతʹ͸མͪண͍͖ͯͨɻ

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όʔδϣϯΛோΊΔ w ฒྻ࣮ߦ w ඪ४ग़ྗͷΩϟϓνϟ w ಈతςετ w !5FNQ%JS w 5FTU8BUDIFS w ج൫։ൃऀ޲͚"1*ॆ࣮ w !5JNFPVU w ֦ுϙΠϯτͭ w NPEVMFରԠ ϚΠΫϩόʔδϣϯ͸όάϑΟοΫεɻ

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Ϟδϡʔϧؔ࿈ w WJOUBHFͱMBVODIFSपΓ͸লུɻίʔυॻ͘ͱ͖ʹग़ͯ͘Δ΋ͷ͚ͩɻ w ·Ͱ͸6TFS(VJEFʹ͜ͷਤ͋ͬͨΜ͚ͩͲɺ͔Βফ͑ͨɻͳ͔ͥ͸஌Βͳ͍ɻ

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+6OJU͸࣮༻ʹ଱͑Δ͔ ·ͬͨ͘໰୊ͳ͍ɻ

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&YUFOTJPOͷ۩ମྫ ͍͔ͭ͘঺հ͠·͢ɻ Կ͕Ͱ͖Δ͔งғؾ͕Θ͔Ε͹͍͍ͳͱɻ

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&YUFOTJPO +6OJU+VQJUFSͷ֦ு 3VOOFS3VMFͷޙܧ +6OJU1MBUGPSNͷ֦ுͰ͸ͳ͍

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ຊՈ੡ w &YUFOTJPOͷొ࿥ෆཁɻউखʹಈ͘ɻʢޙͰग़ͯ͘Δ%&'"6-5@&95&/4*0/4ʣ

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+6OJUඪ४ͷ֦ு Ұ෦ 5JNFPVU&YUFOTJPO 5FNQ%JSFDUPSZ FYQU %JTBCMFE$POEJUJPO 1BSBNFUFSJ[FE5FTU&YUFOTJPO 5FTU*OGP1BSBNFUFS3FTPMWFS

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5JNFPVU&YUFOTJPO @Timeout(value = 3, unit = TimeUnit.MILLISECONDS) public class SampleTimeout { @Test void test() throws Exception { TimeUnit.MILLISECONDS.sleep(5); } } w λΠϜΞ΢τʢ໓ଟʹ࢖Θͳ͍ʣ

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5FNQ%JSFDUPSZ public class SampleTempDir { @TempDir Path tempDirPath; @Test void test() { System.out.println(tempDirPath); } } w !5FNQ%JSͳϑΟʔϧυ΍ύϥϝʔλ͕͋ͬͨΒ04ͷUFNQEJSʹσΟϨΫτϦΛ࡞ͬͯ 1BUIΛηοτͯ͘͠ΕΔɻ w KVOJUQJPOFFSʹ͋ͬͨͷ͕ຊՈʹऔΓࠐ·Εͨɻʢ·ͩ&91&3*.&/5"-͚ͩͲʣ

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αʔυύʔςΟ੡ w ཁ&YUFOTJPOͷొ࿥ɻ

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4QSJOH&YUFOTJPO // Spring @ExtendWith(SpringExtension.class) public class SampleSpringTest { // Spring Boot @SpringBootTest public class SampleSpringBootTest { w 4QSJOH࢖͏ͳΒɻ w 4QSJOH#PPU5FTU͸ϝλΞϊςʔγϣϯͷྫʹ΋ͳΔɻ

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4QSJOH#PPU5FTU w 4QSJOHϢʔβʔͳΒ׳ΕͯΔʢʁʣϝλΞϊςʔγϣϯɻ w +6OJUͩͱ4QSJOH#PPU5FTUͱ3VO8JUIΛซه͢Δඞཁ͕͋ͬͨɻ

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w .PDLJUP+6OJU3VOOFSͷ୅ସɻ w NPDLJUPDPSFʹೖ͍ͬͯͳ͍ NPDLJUPNPDLJUPKVOJUKVQJUFS ͷͰ஫ҙɻ .PDLJUP&YUFOTJPO

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+6OJU+VQJUFS#%%4PGU"TTFSUJPOT w "TTFSU+ͷ֦ுɻ w "GUFS&BDI$BMMCBDLͰ࣮ݱ͍ͯ͠Δɻ

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&YUFOTJPOͷԼࢧ͑ ͬ͘͟Γɺ͔ΜͨΜʹɻ

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&YUFOTJPOͷಈ͔͠ํ

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&YUFOTJPOͷొ࿥ !&YUFOE8JUI !3FHJTUFS&YUFOTJPO 4FSWJDF-PBEFS

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&YUFOTJPOͷొ࿥

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ొ࿥ࡁΈ&YUFOTJPO w ͜Ε͕͋Δ͔Βඪ४ͷ֦ு͕&YUFOE8JUIͱ͔ͳ͠Ͱಈ͘

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&YUFOTJPO͸$POUFYUʹཷΊΔ

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&OHJOF&YFDVUJPO$POUFYU w &OHJOF&YFDVUJPO$POUFYU͸ۭͬΆɻ w +VQJUFSͰͳ͍+6OJU1MBUGPSN͸&YUFOTJPOͳΜͯ஌ͬͨͬͪ͜Όͳ͍ɻ

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&YUFOTJPO$POUFYU &YUFOTJPOͷ࣮૷ΫϥεͰ࢖͏ ʢ͜ͱ͕ଟ͍ʣ ౉ͬͯ͘Δ͔͸֦ுґଘ ʢ&YUFOTJPOΠϯλϑΣʔε͸ ϝιου࣋ͨͳ͍ʣ

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&YUFOTJPO$POUFYUͷड͚औΓ w ΠϯλϑΣʔεͷҾ਺Ͱ౉͞ΕΔɻ w &YUFOTJPO$POUFYU͔ΒςετΠϯελϯεͳͲΛऔಘͯ͠৭ʑ͢Δɻ

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֦ுϙΠϯτ ֦ுϙΠϯτ͝ͱʹΠϯλ ϑΣʔε͕༻ҙ͞Ε͍ͯΔɻ ݺͼग़͠͸+6OJU೚ͤɻ ৽͍֦͠ுϙΠϯτΛ଍͢ͷ ͸೉͍͠ɻ

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&YUFOTJPO)JFSBSDIZ w ߇͑Ίʹݴͬͯ໾ʹཱͨͳ͍ਤɻ

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෼͚ΔͳΒ͜͏ʁ

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$BMMCBDL͕ݺ͹ΕΔλΠϛϯά w 6TFS(VJEFࢀর

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ྫΛڍ͛ͯΈΔ

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%JTBCMFE$POEJUJPO

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4QSJOH&YUFOTJPO 5FTU&YFDVUJPO-JTUFOFSʹͭͳ͙࢓૊ Έ1BSBNFUFSղܾɻ ػೳ௥Ճ͸5FTU&YFDVUJPO-JTUFOFSͰɻ 5FTU$POUFYUҾͬுΓग़͠͸৻ॏʹɻ

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࣮ࡍΑ͘࢖͏΋ͷ

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&YUFOTJPOͷ࡞Γํ ؆୯ʹɻ

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࡞Γํ ֦ுΠϯλϑΣʔ εΛૉ௚ʹ࢖͏ɻ ෺଍Γͳ͍ਓ͸ FOHJOF࣮૷͢Ε͹ ͍͍ʢී௨͠ͳ͍

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΍Δ͜ͱ ࣮૷ΫϥεΛ࡞੒ &YUFOE8JUIͳͲͰొ࿥ w ؆୯Ͱ͠ΐʁ

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࡞ͬͯΈΑ͏ ͳʹ͕͋ͬͯ΋ςετ͸௨ͬ ͯཉ͍͠ʂ

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௨ͬͯཉ͍͠ςετ class MahouTest { @Test void ઈରࣦഊ͢Δ൵͍͠ςετ() { throw new RuntimeException(); } }

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֦ுର৅ͷબ୒

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֦ுର৅ͷબ୒

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ྫ֎ϋϯυϥΛ࣮૷ class MahouExtension implements TestExecutionExceptionHandler { @Override public void handleTestExecutionException( ExtensionContext context, Throwable throwable) { } } w Կ΋͠ͳ͖ΌѲΓͭͿ͢͜ͱʹͳΔɻ

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&YUFOE8JUIͰొ࿥ @ExtendWith(MahouExtension.class) class MahouTest { @Test void ઈରࣦഊ͢Δ൵͍͠ςετ() { throw new RuntimeException(); } }

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΍ͬͨʔ

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׬શʹϚελʔͨ͠ w ͪͳΈʹ00.&͸#MBDL-JTUFEFYDFQUJPOͱͯ͠ಛผѻ͍͞ΕͯΔ͔Βμϝɻ

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୤ઢ#MBDLMJTUFE&YDFQUJPOT w 0VU0G.FNPSZ&SSPS͚ͩ͸ଈ࣌ऴྃ͢Δɻʢ+6OJU1MBUGPSNʣ

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࡞ͬͯΈΑ͏ ॓୊ ςετʹಠࣗΞϊςʔγϣϯ Λ࢖ͬͨ΋ͷɻ ʢώϯτ͸࣍ͷϖʔδʣ

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w TVQQPSUύοέʔδΛ࢖͏ͷ͕ਪ঑ʢ৑௕ʹͳͬͪΌ͏͠ʣ w 4VQQPSUFE6UJMJUJFTJO&YUFOTJPOT

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֦ுͷՖܗ͸ 1BSBNFUFS3FTPMWFS ͩͱࢥ͏ w ͜͜ʹه͢ʹ͸༨ന͕ڱ͗͢ΔɻʢׂѪʣ

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࡞Δͱ͖ͷϙΠϯτ ঢ়ଶ͸4UPSFͰѻ͏ ϝλΞϊςʔγϣϯΛ࡞Δ ҆શ૷ஔʹ߄ͯͳ͍

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w ,FFQJOH4UBUFJO&YUFOTJPOT &YUFOTJPO4UPSF &YUFOTJPOʹঢ়ଶΛ࣋ͭͱ൵͍͜͠ ͱ͕ى͜Δɻ໘౗Ͱ΋4UPSFͰɻ ࢖͍ํ͸ೋஈ֊ͷ.BQɻ .BQ/BNFTQBDF .BQ, 7 ͷΠϝʔδɻ͋͘·ͰΠϝʔδɻ

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4UPSFͱ/BNFTQBDFͱ1BSFOUͱ w &YUFOTJPO7BMVF4UPSFΠϯελϯεͷϥΠϑαΠΫϧ͸&YUFOTJPO$POUFYUͱಉ͡ w 4UPSFΠϯελϯε͸HFU4UPSFͷͨͼʹ࡞ΒΕΔʢ͚ͲͲ͏Ͱ΋͍͍ʣ w /BNFTQBDF࢖͍ʹ͍͘

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ϝλΞϊςʔγϣϯ Ξϊςʔγϣϯʹ෇༩͢ΔΞϊςʔγϣϯ Ξϊςʔγϣϯͷهड़͸৑௕ͳͷͰੵۃతʹ࢖ ͏ &YUFOTJPO࡞ͬͨΒ&YUFOE8JUIͰΞϊςʔτ͠ ͨΞϊςʔγϣϯΛͱΓ͋͑ͣ࡞Δͱ͍͍ɻ +BWBඪ४ͷ࢓૊ΈͰ͸ͳ͍ w .FUB"OOPUBUJPOTBOE$PNQPTFE"OOPUBUJPOT

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҆શ૷ஔ͍ͭͯ·͢ w 5FTU*OTUBODF'BDUPSZͰOVMMΛฦͨ͠ w *OWPDBUJPO*OUFSDFQUPSͰϝιουݺ͹ͳ͔ͬͨ w มͳ͜ͱ͕Ͱ͖ͳ͘ͳͬͯΔɻͨͱ͑͹ςετϝιουΛݺ͹ͳ͘͢Δͱ͔ɻ

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͜ΕͰ+6OJUΛ ׬શʹϚελʔͨ͠ ʜʜͱݴ͍͍ͬͯͱࢥ͏ɻ ςετࣗମ͸10+0ͩ͠ɺΞαʔγϣϯํ๏͸બ୒ࣜɻ FOHJOF΍MBVODIFS͸+6OJU +VQJUFS Ͱ͸ͳ͘ɺ +6OJU1MBUGPSNͷ࿩ͳͷͰɻ