入門ミューテーションテスト/ A bigginer's guide to Mutation testing

by y_ahiru

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PHPΧϯϑΝϨϯεԭೄ 2019 ٢ా͋ͻΔ (@strtyuu) ೖ໳ϛϡʔςʔγϣϯςετ

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ࣗݾ঺հ ٢ా͋ͻΔ !TUSUZVV τΡΪϟολʔגࣜձࣾ 4PGUXBSF&OHJOFFS

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$VSBUJPO$PNNVOJDBUJPO1MBUGPSN IUUQTUPHFUUFSDPN ·ͱΊΑ͏ɺ͋ͭ·Ζ͏

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ςετॻ͍ͯ·͔͢ʁ

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lྑ͍zςετॻ͍ͯ·͔͢ʁ

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ྑ͍ςετͬͯԿͩΖ͏ ɾಡΊ͹Ϋϥεͷ࢓༷͕Θ͔Δʁ ɾόά͕ൃੜ͠ͳ͍͜ͱΛอূͯ͘͠ΕΔʁ ɾ։ൃͷϦζϜΛ࡞ͬͯ͘ΕΔʁ 5%% ɾFUD

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ྑ͍ςετͬͯԿͩΖ͏ ɾಡΊ͹Ϋϥεͷ࢓༷͕Θ͔Δʁ ɾόά͕ൃੜ͠ͳ͍͜ͱΛอূͯ͘͠ΕΔʁ ɾ։ൃͷϦζϜΛ࡞ͬͯ͘ΕΔʁ 5%% ɾFUD

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Ͳ͏΍ͬͯ֬ೝ͢Δʜʜʁ ɾڧ͍ΤϯδχΞʹϨϏϡʔͯ͠΋Β͏ʁ ɾΧόϨοδΛʹ͢Δʁ

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Ͳ͏΍ͬͯ֬ೝ͢Δʜʜʁ ɾڧ͍ΤϯδχΞʹϨϏϡʔͯ͠΋Β͏ʁ ɾΧόϨοδΛʹ͢Δʁ

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ϛϡʔςʔγϣϯςετ Λ࢖͓͏

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ϛϡʔςʔγϣϯςετͱ͸

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ςετ ΞϓϦέʔγϣϯ ඼࣭Λอূ

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ϛϡʔςʔγϣϯςετ ςετ ΞϓϦέʔγϣϯ ඼࣭Λอূ ඼࣭Λอূ

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Ͳ͏΍͍ͬͯΔͷ͔ ɾΞϓϦέʔγϣϯίʔυΛมҟͤ͞ɺ࠶౓ς ετΛ࣮ߦ͢Δ͜ͱͰςετͷਖ਼౰ੑΛධՁ͢ Δ

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IUUQTHJUIVCDPNJOGFDUJPOJOGFDUJPO

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ɾ'VODUJPO4JHOBUVSF ɾ6OXSBQ'VODUJPO ɾ#JOBSZ"SJUINFUJD ɾ3PVOE'BNJMZ ɾ#PPMFBO4VCTUJUVUJPO ɾ$POEJUJPOBM#PVOEBSJFT ɾ&RVBMPS*EFOUJDBM$IFDLT ɾ/FHBUFE$POEJUJPOBMT ɾ0QFSBUPS ɾ*ODSFNFOUT ɾ3FUVSO7BMVFT ɾ3FNPWBM.VUBUPST ɾ-PPQ ɾ4PSUJOH ɾ-JUFSBM/VNCFST ɾ&YDFQUJPOT ɾ5ZQF$BTUJOH ɾ3FHFY ɾ&YUFOTJPOT

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$a = array_filter([‘A’, 3, ‘C’], ‘is_int’); $a = [‘A’, 3, ‘C’];

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$a < $b $a <= $b $a >= $b

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try {} catch (\Exception $e) {} finally {} try {} catch (\Exception $e) {}

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%&.0

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ϛϡʔςʔγϣϯςετ  ׆༻͍͖ͯ͠·͠ΐ͏ʂ