One Espresso with Kotlin, please

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#devfestbkk

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#devfestbkk Android Studio 3 SDK > 21 Emulator https://github.com/VerachadW/sneaker-app/

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#devfestbkk

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#devfestbkk

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#devfestbkk @RunWith(AndroidJUnit4.class) public class NotesActivityTest { @Rule public ActivityTestRule activity = new ActivityTestRule<>(Activity.class); @Test public void notesActivityTest2() { onView(allOf(withParent(withId(R.id.my_button)),isDisplayed())) .perform(click()); } }

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#devfestbkk

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#devfestbkk @RunWith(AndroidJUnit4::class) class NotesActivityTest { @Rule var activity = ActivityTestRule(NotesActivity::class.java) @Test fun notesActivityTest2() { onView(allOf(withParent(withId(R.id.my_button)),isDisplayed())) .perform(click()); } } @RunWith(AndroidJUnit4.class) public class NotesActivityTest { @Rule public ActivityTestRule activity = new ActivityTestRule<>(Activity.class); @Test public void notesActivityTest2() { onView(allOf(withParent(withId(R.id.my_button)),isDisplayed())) .perform(click()); } }

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#devfestbkk

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#devfestbkk DSL

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#devfestbkk DSL Domain Specific Language

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#devfestbkk body { background-color: lightblue; }

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#devfestbkk apply plugin: 'com.android.application' apply plugin: 'kotlin-android' android { compileSdkVersion 25 buildToolsVersion "26.0.0" defaultConfig { applicationId "bkk.firebase.com.myapplication" minSdkVersion 15 targetSdkVersion 26 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } }

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#devfestbkk verticalLayout { padding = dip(32) imageView(android.R.drawable.ic_menu_manage).lparams { margin = dip(16) gravity = Gravity.CENTER } val name = editText { hintResource = R.string.name } val password = editText { hintResource = R.string.password inputType = TYPE_CLASS_TEXT or TYPE_TEXT_VARIATION_PASSWORD } button("Log in") { onClick { ui.owner.tryLogin(ui, name.text, password.text) } } myRichView() }.applyRecursively(customStyle)

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#devfestbkk DSL +

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#devfestbkk Kotin in Action

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#devfestbkk Lambdas

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#devfestbkk { x : Int, y: Int -> x + y } Lambdas

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buttonSend.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v){ send(); } }); #devfestbkk

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buttonSend.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View v){ send(); } }); buttonSend.setOnClickListener(object :OnClickListener{ override fun onClick(view : View){ send(); } }) #devfestbkk

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#devfestbkk /** * Calls the specified function [block] with `this` value as its receiver and returns `this` value. */ @kotlin.internal.InlineOnly public inline fun T.apply(block: T.() -> Unit): T { block(); return this } fun alphabet() = StringBuilder().apply { for (letter in 'A'..'Z') { append(letter) } append("\nNow I know the alphabet!") }.toString()

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#devfestbkk /** * Calls the specified function [block] with `this` value as its receiver and returns `this` value. */ @kotlin.internal.InlineOnly public inline fun T.apply(block: T.() -> Unit): T { block(); return this } /** * Calls the specified function [block] with the given [receiver] as its receiver and returns its result. */ @kotlin.internal.InlineOnly public inline fun with(receiver: T, block: T.() -> R): R = receiver.block()

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#devfestbkk /** * Calls the specified function [block] with `this` value as its receiver and returns `this` value. */ @kotlin.internal.InlineOnly public inline fun T.apply(block: T.() -> Unit): T { block(); return this } /** * Calls the specified function [block] with the given [receiver] as its receiver and returns its result. */ @kotlin.internal.InlineOnly public inline fun with(receiver: T, block: T.() -> R): R = receiver.block() fun alphabet() = with(StringBuilder()) { for (letter in 'A'..'Z') { append(letter) } append("\nNow I know the alphabet!") toString() }

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#devfestbkk infix fun T.execute(fn: T.() -> Unit) = this.fn()

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#devfestbkk infix fun T.execute(fn: T.() -> Unit) = this.fn() val myFragment = Fragment() myFragment execute { onPause() onDestroy() }

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#devfestbkk infix fun T.execute(fn: T.() -> Unit) = this.fn() val myFragment = Fragment() myFragment execute { onPause() onDestroy() }

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#devfestbkk Kakao

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#devfestbkk Kakao Ilya Ivan Konstantin Zoey

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#devfestbkk @Test fun test() { screen { content { isVisible() } textViewLarge { click() isVisible() hasAnyText() } } }

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#devfestbkk androidTestCompile 'com.agoda.kakao:kakao:1.0.0'

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#devfestbkk class TestActivityScreen: Screen()

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#devfestbkk class TestActivityScreen: Screen() val content: KView = KView { withId(R.id.content) } val textViewLarge: KTextView = KTextView { withId(R.id.text_view_small) }

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#devfestbkk @Test fun test() { screen { content { isVisible() } textViewLarge { click() isVisible() hasAnyText() } } }

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#devfestbkk @Test fun test() { screen { content { isVisible() } textViewLarge { click() isVisible() hasAnyText() } } } @Test fun notesActivityTest2() { onView(allOf(withParent(withId(R.id.my_button)),isDisplayed())) .perform(click()); }