Integration test in Go - Speaker Deck

Integration test in Go

by https://speakerdeck.com/linyows

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5PNPIJTB0EB(.01FQBCP *OD +VOF (FFLT8IP%SJOLJO'VLVPLB (P(P(PMBOH&EJUJPO (PͰ΋΍Ζ͏ʂ ΠϯςάϨʔγϣϯςετ

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ϓϦϯγύϧΤϯδχΞ খా஌ԝ!MJOZPXT ٕज़෦ٕज़ج൫νʔϜ IUUQUPNPIJTBPEBDPN

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ϒϩάɿIUUQUPNPIJTBPEBDPNQPTUTFBTF@NBOBHFNFOU@PG@MJOVY@TFSWFS@BENJOJTUSBUPSIUNM ࠷ۙ࡞ͬͨ044ͷ͝঺հ MJOVYϢʔβͷ໊લղܾΛHJUIVCͷUFBNTͰߦ͏

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ৄࡉ͸໌ޙ೔ͷ :"1$'VLVPLBલʑ໷ࡇͰ ͓࿩͠͠·͢ʂ ⚠શવ໺ࡊ͸ɺલ໷ࡇͷલͷ࣌ؒʹ͋ΔϖύϘඇެࣜΠϕϯτͰ͢

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(PΛۀ຿Ͱ࢖͍ͬͯ·͔͢ʁ ʕ◔ϖ◔ʔ ࣸਅఏڙɿ෱Ԭࢢ

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(PΛۀ຿Ͱ࢖͍ͬͯ·͔͢ʁ wαʔϏεͷίΞͱͯ͠࢖͍ͬͯΔ wαʔϏεͷҰ෦ͱͯ͠࢖͍ͬͯΔ wࣾ಺ศརπʔϧͰ࢖͍ͬͯΔ wϓϥΠϕʔτͰ͸࢖͍ͬͯΔ

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(Pͷςετ͸ॻ͍ͯ·͢Ͷʁ ʕ◔ϖ◔ʔ … ʕ◔ϖ◔ʔ ࣸਅఏڙɿ෱Ԭࢢ

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΋ͪΖΜॻ͍ͯ·͢ϤΥʙ ʘશһखΛ͋͛Δʗ

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࠷ۙͷ෩ܠ ϧʔςΟϯά͕ແ͍͍ͤͰɺͱ͋ Δ"1*͕ػೳ͍ͯ͠ͳ͔ͬͨɻ ϧʔςΟϯάͷςετΛ௥Ճʁ 3FRVFTU΍%#Λελϒͯ͠"1*Λ ࣮ߦ͢ΔςετΛॻ͘ʁ ͦΕ΋େࣄ

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ͦ΋ͦ΋ ࠷ऴతͳಈ࡞Λ୲อ͢Δ ςετ͕ͳ͔ͬͨ

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ͭ·ΓɺΠϯςάϨʔγϣϯςετ ʢ"1*ͩͱ&OEUP&OEʹ͍͔ۙ΋ʣ ࣸਅఏڙɿ෱Ԭࢢ

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લఏ w)551(P"1*%#Λ౷߹ͨ͠ςετ w(PͷϓϩμΫτͳͷͰ(PͰ΍Γ͍ͨʢ wͦͯ͠γϯϓϧʹUFTUJOHύοέʔδͰ׬͍ྃͨ͠

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ͳΔ΄Ͳʜ؆୯ʹ΍Ε·͢Ͷ func TestFooAPI(t *testing.T) { expectedBody, _ := ioutil.ReadFile(“./testdata/foo/get_res.json”) res, _ := http.Get(endpoint + “/foo”) gotBody, _ := ioutil.ReadALL(res.Body) res.Body.Close() if gotBody != expectedBody { t.Error(“FooAPI returns wrong body”) } }

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Ϛελσʔλ΍ ظ଴͢ΔϨεϙϯεͷͨΊʹ 4FFEσʔλΛςετ࣮ߦલʹ ೖΕ͓͖͍ͯͨ

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5FTU.BJO͕͋Γ·ͯ͠ͶʜॳظԽͱޙॲཧ func TestMain(m *testing.M) { setup() retCode := m.Run() os.Exit(retCode) } func setup() { db, _ := sql.Open(“postgres”, connInfo) db.Exec("DELETE FROM foo”) db.Exec("INSERT INTO bar(… defer db.Close() } func teardown() { db.Exec("TRUNCATE TABLE foo CASCAD… defer db.Close() }

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5FTU.BJO͸QBDLBHF୯ҐͰDBMM͞ΕΔ /cmd/myapp/main.go /handlers/foo.go foo_test.go main_test.go /models/foo.go foo_test.go main_test.go /integration_test.go

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5FTU.BJO͸ ύοέʔδ͝ͱ ̍౓͔࣮͠ߦ͞Εͳ͍ʜ ຖճॲཧ͍ͨ͠৔߹͸ʁ

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ςετͷ౓ʹࣄલࣄޙॲཧΛ͢Δ func TestFoo(t *testing.T) { defer SetupTeardown(t)() . . . } func SetupTeardown(t *testing.T) func() { t.Log(“Setup”) return func() { t.Log(“Teardown”) } }

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ීஈͷHPUFTUͰ ΠϯςάϨʔγϣϯςετ͸ ࣮ߦ͞Εͳ͍Ͱ΄͍͠

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Ҿ਺Λ࢖͏

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ͨͩ͠ɺ͢΂ͯͷςετʹ෼ذ͕ඞཁ var integration = flag.Bool(“integration”, false, “run integration test”) func TestMain(m *testing.M) { flag.Parse() if *integration { setup() } retCode := m.Run() if *integration { teardown() } os.Exit(retCode) } func TestIntegration1(t *testing.T) { if !*integration { t.Skip() } . . .

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Ϣχοτςετ͸ HPUFTU ΠϯςάϨʔγϣϯςετ͸ HPUFTUJOUFHSBUJPO ͱ͍͏࢖͍෼͚͕ग़དྷΔ

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͋͞ɺ͜ΕͰͲΜͲΜςετॻ͍ͯ ඼࣭Λ্͍͛ͯͧ͘ʂʂʂ ࣸਅఏڙɿ෱Ԭࢢ

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༨ஊͰ͕͢ ςετͷཻ౓ʹ΋ όϥϯε͕͋Γ·͢ͷͰ ͝஫ҙ͍ͩ͘͞ 6*& (PPHMF5FTUJOH#MPH+VTU4BZ/PUP.PSF&OEUP&OE5FTUT IUUQTUFTUJOHHPPHMFCMPHDPNKVTUTBZOPUPNPSFFOEUPFOEUFTUTIUNM

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·ͱΊ wΠϯςάϨʔγϣϯςετ͸खܰʹ͔͚·͢ wҾ਺Λ࢖͑͹ϢχοτςετͱΠϯςάϨʔγϣϯςετ Λ෼͚࣮ͯߦͰ͖Δ wύοέʔδ͝ͱ5FTU.BJOͰςετͷࣄલࣄޙॲཧ͕Ͱ͖Δ w֤ςετ͝ͱʹࣄલࣄޙॲཧΛ΍Γ͍ͨ৔߹΋Ұߦ௥Ճ͢ Ε͹Մೳ