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~Better Specs ʹֶͿ~
Swiftʹ͓͚Δຊʹ
RSpecϥΠΫͳςετͷॻ͖ํ
iOS Test Night #9 - 2प -
2018/12/10
@rockname
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@rockname
גࣜձࣾϛΫγΟ / ΈͯͶࣄۀ෦
ΞϓϦ։ൃG 18৽ଔ
iOS(Swift, objc) > Android(Kotlin, Java) == Rails(ruby)
ˎॻ͘ྔͷॱ൪
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ΈͯͶͰνʔϜશମͰ
ςετΛॻ͘จԽ͕
͍͍ࠜͯΔ
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ςετ͕ͳ͔ͬͨΒbotʹἤΒΕΔ
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iOSͷςετڥ
• ςετϑϨʔϜϫʔΫͱͯ͠ Quick/Nimble Λ࠾༻
• RSpecʹΠϯεύΠΞ͞ΕͨBDD Framework
• ΈͯͶServerͷςετΛRSpecͰॻ͍͍ͯΔͷͰ׳Ε͍ͯΔਓ͕ؒ
ଟ͍
• Mock…
• ಛʹϥΠϒϥϦ͍ͬͯͳ͍ (Φεεϝ͕͋Εڭ͍͑ͯͩ͘͞)
• Mock ObjectΛςετ͝ͱʹఆ͍ٛͯ͠Δ
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BDDͰςετΛॻ͘ͳΒ
ಡΈ͍͢ςετΛॻ͖͍ͨ…ʂ
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Better Specs
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Better Specs ͱʁ
• RSpecʹ͓͚Δྑ͍ςετͷ࡞ΓํΛूΊͨΨΠυϥΠϯ
• GitHubͰopenʹཧ͞Ε͍ͯΔ
• ॻ͖ํʹ͕ٙ͋Εissue্Ͱٞ͢Δ͜ͱ͕Ͱ͖Δ
• RSpecͷॻ͖ํʹ໎ͬͨΒྑ͘ݟΔ
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RSpecʹӨڹ͞ΕͨQuickͰ
Better Specs ʹͳΒͬͯ
ՄಡੑΛ্͛Δͧ
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FizzBuzzؔͷςετΛॻ͘
• ҾʹIntΛऔΓɺ
• 3ͷഒͷ࣌ -> “Fizz”
• 5ͷഒͷ࣌ -> “Buzz”
• 3ͱ5ͷެഒͷ࣌ -> “FizzBuzz”
• 0ҎԼͷ࣌ -> “out of range”
• ͦΕҎ֎ͷ࣌ -> ༩͑ΒΕͨࣈΛͦͷ··ฦ͢
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FizzBuzzؔ
enum FizzBuzz {
static func fizzBuzz(_ number: Int) -> String {
guard number > 0 else { return "out of range” }
switch number {
case let n where n % 15 == 0: return "FizzBuzz"
case let n where n % 5 == 0: return "Buzz"
case let n where n % 3 == 0: return "Fizz"
default: return String(number)
}
}
}
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·ͣԿߟ͑ͣʹͱΓ͋͑ͣ
ςετΛॻ͍ͯΈΔ ✍
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
ςετରͷϝιου
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
ظ͞ΕΔϝιουͷ;Δ·͍
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
3ͷഒͷ࣌ -> “Fizz”
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
5ͷഒͷ࣌ -> “Buzz”
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
3ͱ5ͷެഒͷ࣌ -> “FizzBuzz”
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
0ҎԼͷ࣌ -> ”out of range”
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
ͦΕҎ֎ͷ࣌ -> ༩͑ΒΕͨࣈ
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
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ͳʹߟ͑ͣʹॻ͍ͨςετ
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
ύοͱݟͯϝιουͷৼΔ͍͕
ཧղ͠ʹ͍͘
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Better Specs
1. ୯Ұ݅ςετ
2. ContextΛ͏
3. SubjectΛ͏
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Better Specs
1. ୯Ұ݅ςετ
2. ContextΛ͏
3. SubjectΛ͏
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#FUUFS4QFDT
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#FUUFS4QFDT
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#FUUFS4QFDT
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୯Ұ݅ςετ
describe("#fizzBuzz") {
it("should return Fizz when given multiples of 3") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
}
it("should return Buzz when given multiples of 5") {
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
}
it("should return FizzBuzz
when given multiples of both 3 and 5") {
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
}
ɾ
ɾ
ɾ
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୯Ұ݅ςετ
describe("#fizzBuzz") {
it("should return Fizz when given multiples of 3") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
}
it("should return Buzz when given multiples of 5") {
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
}
it("should return FizzBuzz
when given multiples of both 3 and 5") {
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
}
ɾ
ɾ
ɾ
3ͷഒͷ࣌ -> “Fizz”
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୯Ұ݅ςετ
describe("#fizzBuzz") {
it("should return Fizz when given multiples of 3") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
}
it("should return Buzz when given multiples of 5") {
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
}
it("should return FizzBuzz
when given multiples of both 3 and 5") {
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
}
ɾ
ɾ
ɾ
5ͷഒͷ࣌ -> “Buzz”
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୯Ұ݅ςετ
describe("#fizzBuzz") {
it("should return Fizz when given multiples of 3") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
}
it("should return Buzz when given multiples of 5") {
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
}
it("should return FizzBuzz
when given multiples of both 3 and 5") {
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
}
ɾ
ɾ
ɾ
3ͱ5ͷެഒͷ࣌ -> “FizzBuzz”
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Better Specs
1. ୯Ұ݅ςετ
2. ContextΛ͏
3. SubjectΛ͏
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#FUUFS4QFDT
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#FUUFS4QFDT
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#FUUFS4QFDT
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ContextΛ͏
describe("#fizzBuzz") {
context("when given multiples of 3") {
it("should return Fizz") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
}
}
context("when given multiples of 5") {
it("should return Buzz") {
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
}
}
ɾ
ɾ
ɾ
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ContextΛ͏
describe("#fizzBuzz") {
context("when given multiples of 3") {
it("should return Fizz") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
}
}
context("when given multiples of 5") {
it("should return Buzz") {
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
}
}
ɾ
ɾ
ɾ
3ͷഒͷ࣌ -> “Fizz”
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ContextΛ͏
describe("#fizzBuzz") {
context("when given multiples of 3") {
it("should return Fizz") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
}
}
context("when given multiples of 5") {
it("should return Buzz") {
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
}
}
ɾ
ɾ
ɾ
5ͷഒͷ࣌ -> “Buzz”
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Better Specs
1. ୯Ұ݅ςετ
2. ContextΛ͏
3. SubjectΛ͏
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#FUUFS4QFDT
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#FUUFS4QFDT
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#FUUFS4QFDT
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#FUUFS4QFDT
subject = ςετରͷओମ
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SubjectΛ͏
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
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SubjectΛ͏
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
ҾΛมͱͯ͠ఆٛ
subjectΛܭࢉܕϓϩύςΟͱͯ͠એݴ
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SubjectΛ͏
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
beforeEach ͰcontextʹԠͨ͡
Λnumberมʹೖ
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SubjectΛ͏
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
ɹexpectʹsubjectͷΈ͢
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SubjectΛ͏
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
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Ͳ͏มΘͬͨͷ
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Before
class FizzBuzzSpec: QuickSpec {
override func spec() {
describe("#fizzBuzz") {
it("should meet all FizzBuzz specifications") {
expect(FizzBuzz.fizzBuzz(3)).to(equal("Fizz"))
expect(FizzBuzz.fizzBuzz(5)).to(equal("Buzz"))
expect(FizzBuzz.fizzBuzz(15)).to(equal("FizzBuzz"))
expect(FizzBuzz.fizzBuzz(-1))
.to(equal(“out of range"))
expect(FizzBuzz.fizzBuzz(1)).to(equal("1"))
}
}
}
}
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After
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
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After
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
Կ͕ (What)
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After
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
Կ͕ (What)
͍ͭ (When)
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After
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
͍ͭ (When)
Կ͕ (What)
Ͳ͏ͳΔͷ͔ (How)
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After
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
͍ͭ (When)
Կ͕ (What)
Ͳ͏ͳΔͷ͔ (How)
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After
describe("#fizzBuzz") {
var number: Int!
var subject: String {
return FizzBuzz.fizzBuzz(number)
}
context("when given multiples of 3") {
beforeEach {
number = 3
}
it("should return Fizz") {
expect(subject).to(equal("Fizz"))
}
}
ɾ
ɾ
ɾ
͍ͭ (When)
Կ͕ (What)
Ͳ͏ͳΔͷ͔ (How)
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·ͱΊ
• QuickRSpecʹΠϯεύΠΞ͞ΕͨBDD Framework
• BetterSpecsʹͳΒͬͯॻ͘͜ͱͰɺͦͷϝιουͷ༷͕ཧղ͠
͘͢ͳΔςετΛॻ͚Δ (Spec = Specification = ༷ॻ)
• ͨͩɺ͖ݏ͍ඞͣ͋ΔͷͰڧ੍ྑ͘ͳ͍
(XCTestͰWhat/When/HowΛҙࣝͨ͠ςετॻ͚Δ)
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Thank you!!!