Nicolas Mouchel

Tech lead Android

@_sagix

Premier pas

Online

Kotlin playground

https://play.kotlinlang.org/

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Online

Try kotlin

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https://try.kotlinlang.org/

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IDE

EduTools

https://kotlinlang.org/docs/tutorials/edu-tools-learner.html

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REPL - Read–eval–print loop

Script

Scratch

⇧⌘N

Tests unitaires

@get:Rule val rule: MockitoRule = MockitoJUnit.rule()

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@Mock private lateinit var featureCallback: () -> Unit

@Mock private lateinit var onboardingCallback: () -> Unit

@Mock private lateinit var state: InboxInvitationsState

@InjectMock private lateinit var guide: InboxInvitationsBreakerGuide

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@Before fun setUp() {

[...]

}

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@Test fun `Given never displayed, then redirected to onBoarding`() {

given(state.lastTimeInvitationOnboardingDisplayed).willReturn(null)

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guide.guideToNextScreen(onboardingCallback, featureCallback)

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then(onboardingCallback).should().invoke()

}

A éviter

• Kotlin native
• Kotlin javascript
• Kotlin multi-platform

Erreurs à éviter

Convert Java File to Kotlin File

Bang!!

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The operator for NPE-lovers

!!

Interopérabilité Java kotlin

String!

Interopérabilité Java kotlin

String?

lateinit

Lambda of hell

Questions ?: “Thank you”