Cooking with Spek

Cooking with Spek

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Your host
Simon Vergauwen
Android developer
[email protected]
@vergauwen_simon

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AppFoundry

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A Speciﬁcation Framework

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Cooking with Spek
Spek
Clean Testing
Basic spek test
Spek structure
Iterative testing
Technology Compatibility Kits (TCK)

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A Speciﬁcation Framework

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Basic Spek test

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Coding Example
Simple Method
@file:JvmName("JsonUtil") 
package be.appfoundry.spekdemo.util 
 
import android.support.v4.util.ArrayMap 
import android.util.JsonWriter 
import java.io.StringWriter
fun writeToJson(values: ArrayMap): String { 
// Impl 
}

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Coding Example
JUnit Test
public class JsonUtilUnitTest { 
 
ArrayMap arrayMap; 
 
@Before 
public void setUp() throws Exception { 
arrayMap = new ArrayMap<>(); 
}
 
@After 
public void tearDown() throws Exception { } 
}

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Coding Example
JUnit Test
public class JsonUtilUnitTest { 
 
ArrayMap arrayMap; 
 
@Before 
public void setUp() throws Exception { 
arrayMap = new ArrayMap<>(); 
}
 
@Test 
public void testWriteSingleMapToJSON() { 
arrayMap.put("A","B"); 
String json = JsonUtil.writeToJson(arrayMap); 
assertThat(json, containsString("\"A\":\"B\"")); 
} 
 
@After 
public void tearDown() throws Exception { } 
}

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Coding Example
JUnit Test

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Coding Example
Spek setup
//setup kotlin
testCompile "org.jetbrains.kotlin:kotlin-stdlib:1.0.3" 
testCompile “org.jetbrains.kotlin:kotlin-test:1.0.3”
//setup spek 
testCompile "org.jetbrains.spek:spek-api:1.0.89" 
testCompile “org.jetbrains.spek:spek-junit-platform-engine:1.0.89"
//setup unit platform runner 
testCompile "org.junit.platform:junit-platform-runner:1.0.0-M2"

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Coding Example
Basic Spek test
@RunWith(JUnitPlatform::class)
class JsonWriterUnitTest : Spek({ 
})

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Coding Example
Basic Spek test
context("A json writer") { 
 
} 
})

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Coding Example
Basic Spek test
given("a single value map") { 
val singleValueMap = arrayMapOf(Pair("A", "B")) 
} 
} 
})

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Coding Example
Basic Spek test
@RunWith(JUnitPlatform::class) 
 
it("should contain A:B") { 
val json = writeToJson(singleValueMap) 
assertThat(json, containsString("\"A\":\"B\"")) 
} 
} 
} 
})

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Coding Example
Basic Spek test

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Coding Example
Simple Method
@file:JvmName("JsonUtil") 
package be.appfoundry.spekdemo.util 
 
import android.support.v4.util.ArrayMap 
import android.util.JsonWriter 
import java.io.StringWriter
fun writeToJson(values: ArrayMap): String { 
// Impl 
}

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Coding Example
Simple Method
java.lang.RuntimeException: Method beginObject in android.util.JsonWriter not
mocked. See http://g.co/androidstudio/not-mocked for details.
at android.util.JsonWriter.beginObject(JsonWriter.java)
at be.appfoundry.spekdemo.util.JsonUtil.writeToJson(JsonWriter.kt:12)
at be.appfoundry.spekdemo.util.JsonWriterSpekTest
$1$1$1$1.invoke(JsonWriterSpekTest.kt:21)
at be.appfoundry.spekdemo.util.JsonWriterSpekTest
$1$1$1$1.invoke(JsonWriterSpekTest.kt:14)
at org.jetbrains.spek.engine.Scope$Test.execute(Scope.kt:110)

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Coding Example
unMock
apply plugin: 'de.mobilej.unmock' 
unMock { 
keep "android.webkit.URLUtil" 
keepStartingWith "android.util." 
}
classpath “de.mobilej.unmock:UnMockPlugin:0.5.0”
https://github.com/bjoernQ/unmock-plugin

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Spek structure

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Coding Example
Spek structure
 
} 
} 
} 
})

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Coding Example
Spek structure
 
} 
} 
} 
})
abstract class Spek(val spec: Dsl.() -> Unit)

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Coding Example
Spek structure
 
} 
} 
} 
})

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Coding Example
Spek structure
context("A json writer") {
beforeEach {//context beforeEach } 
 
} 
}
afterEach {//context afterEach } 
} 
})

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Coding Example
Spek structure
 
} 
} 
} 
})

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Coding Example
Spek structure
beforeEach { //given beforeEach }
 
}
afterEach { //given beforeEach } 
} 
} 
})

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Coding Example
Spek structure
context("A json writer") {
beforeEach {//context beforeEach }
 
beforeEach { //given beforeEach }
 
}
afterEach { //given beforeEach } 
}
afterEach {//context afterEach } 
} 
})

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Coding Example
Spek structure
val singleValueMap = arrayMapOf(Pair("A", "B"))
 
then("should contain A:B") { 
} 
} 
} 
})
fun Dsl.then(description: String, body: () -> Unit) { 
test("then $description", body = body) 
}

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Coding Example
Spek structure
val singleValueMap = arrayMapOf(Pair("A", "B"))
 
xit("should contain A:B",reason = "pending version 2") { 
}
} 
} 
})

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Iterative testing

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Coding Example
JUnit example
@RunWith(Parameterized.class) 
public class MainPresenterUnitTest { 
 
@Parameters 
public static String[] data() { 
return new String[]{"[email protected]", "[email protected]", 
“[email protected]", "@AppFoundryBE"}; 
} 
 
public MainPresenterUnitTest(String input) { 
this.input = input; 
} 
}

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Coding Example
JUnit example
@RunWith(Parameterized.class) 
public class MainPresenterUnitTest { 
 
@Parameters 
public static String[] data() { 
return new String[]{"[email protected]", "[email protected]", 
“[email protected]", "@AppFoundryBE"}; 
} 
 
public MainPresenterUnitTest(String input) { 
this.input = input; 
} 
 
@Before 
public void setUp() { 
mainView = mock(MainView.class); 
mainPresenter = new MainPresenter(); 
mainPresenter.attachView(mainView); 
} 
 
@Test 
public void testIfItemIsShowAsEmail() { 
mainPresenter.processText(input); 
verify(mainView, times(1)).showItem(argThat(isA(MailItem.class))); 
} 
}

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Coding Example
JUnit example

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Coding Example
Iterative testing
class MainPresenterSpekTest : Spek({ 
describe("The MainPresenter is handling the MainView") { 
var mainPresenter = MainPresenter() 
var mainView = mock() 
 
beforeEach { 
mainPresenter = MainPresenter() 
mainView = mock() 
mainPresenter.attachView(mainView) 
} 
 
on("processing a correctly formatted email adres") { 
listOf("[email protected]", "[email protected]", 
"[email protected]", "@AppFoundryBE").forEach { email -> 
it("should show $email") { 
mainPresenter.processText(email) 
verify(mainView, times(1)).showItem(argThat(isA(MailItem::class.java))) 
} 
} 
} 
} 
})

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Coding Example
Iterative testing
class MainPresenterSpekTest : Spek({ 
describe("The MainPresenter is handling the MainView") { 
var mainPresenter = MainPresenter() 
var mainView = mock() 
 
beforeEach { 
mainPresenter = MainPresenter() 
mainView = mock() 
mainPresenter.attachView(mainView) 
} 
 
on("processing a correctly formatted email adres") { 
listOf("[email protected]", "[email protected]", 
"[email protected]", "@AppFoundryBE").forEach { email ->
 
it("should show $email") { 
mainPresenter.processText(email) 
verify(mainView, times(1)).showItem(argThat(isA(MailItem::class.java))) 
} 
} 
} 
} 
})

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Coding Example
Iterative testing

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Technology Compatibility Kits (TCK)

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TCK
Item
MailItem PhoneItem TwitterItem URLItem

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Coding Example
TCK
abstract class ItemTCK(val item: Item) : Spek({ 
//spek test 
}) 
 
class URLItemTCKTest : ItemTCK(URLItem("www.appfoundry.be")) 
 
class TwitterItemTCKTest : ItemTCK(TwitterItem("@AppFoundryBE")) 
 
class MailItemTCKTest : ItemTCK(MailItem("[email protected]")) 
 
class PhoneItemTCKTest : ItemTCK(PhoneItem("003238719966"))

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Coding Example
TCK
abstract class ItemTCK(val factory: () -> Item) : Spek({ 
val item = factory()
//spek test 
})
class URLItemTCKTest : ItemTCK({ URLItem("www.appfoundry.be") }) 
 
class TwitterItemTCKTest : ItemTCK({ TwitterItem("@AppFoundryBE") }) 
 
class MailItemTCKTest : ItemTCK({ MailItem("[email protected]") }) 
 
class PhoneItemTCKTest : ItemTCK({ PhoneItem("003238719966") })

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Coding Example
TCK
@RunWith(PowerMockRunner::class) 
@PowerMockRunnerDelegate(JUnitPlatform::class) 
@PrepareForTest(ContextCompat::class) 
 
})

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Coding Example
TCK
 
describe("handling an item object") { 
val context = mock() 
val drawable = mock() 
beforeEach { 
PowerMock.mockStatic(ContextCompat::class.java) 
whenever(ContextCompat.getDrawable(any(), any())) 
.thenReturn(drawable) 
} 
 
} 
})

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Coding Example
TCK
 
describe("handling an item object") { 
val context = mock() 
val drawable = mock() 
beforeEach { 
PowerMock.mockStatic(ContextCompat::class.java) 
whenever(ContextCompat.getDrawable(any(), any())) 
.thenReturn(drawable) 
} 
 
it("should never have a null name") { 
assertThat(item.name, notNullValue()) 
} 
it("should always have a color id") { 
assertThat(item.itemColorId, isA(Int::class.java)) 
} 
it("should always return a drawable") { 
assertThat(item.getIcon(context), equalTo(drawable)) 
} 
} 
})

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Coding Example
TCK

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Simplify your tests

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Coding Example
Simple Rx function
fun doSomeRxing(): Observable = 
Observable.just(1L).observeOn(AndroidSchedulers.mainThread())

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Coding Example
Simple Rx function
java.lang.ExceptionInInitializerError
at rx.android.schedulers.AndroidSchedulers.mainThread(AndroidSchedulers.java:39)
at be.appfoundry.spekdemo.util.RxMethodKt.doSomeRxing(RxMethod.kt:8)
at be.appfoundry.spekdemo.util.RxTest$1$1$2.invoke(RxTest.kt:22)
at be.appfoundry.spekdemo.util.RxTest$1$1$2.invoke(RxTest.kt:16)
... 
 
Caused by: java.lang.RuntimeException: Method getMainLooper in android.os.Looper not
mocked. See http://g.co/androidstudio/not-mocked for details.
at android.os.Looper.getMainLooper(Looper.java)
at rx.android.schedulers.AndroidSchedulers
$MainThreadSchedulerHolder.(AndroidSchedulers.java:31)
... 32 more

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Coding Example
JUnit rule for Rx
public class RxJavaResetRule implements TestRule { 
@Override 
public Statement apply(final Statement base, final Description description) { 
 
}
}

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Coding Example
JUnit rule for Rx
@Override 
return new Statement() { 
@Override 
public void evaluate() throws Throwable { 
//@Before 
 
base.evaluate(); 
 
//@After 
}  
}; 
}
}

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Coding Example
JUnit rule for Rx
@Override 
return new Statement() { 
@Override 
public void evaluate() throws Throwable { 
//@Before 
RxJavaPlugins.getInstance().reset(); 
RxJavaPlugins.getInstance().registerSchedulersHook(rxJavaHook); 
 
RxAndroidPlugins.getInstance().reset(); 
RxAndroidPlugins.getInstance().registerSchedulersHook(rxAndroidHook); 
 
base.evaluate(); 
 
//@After 
RxJavaPlugins.getInstance().reset(); 
RxAndroidPlugins.getInstance().reset(); 
}  
}; 
}
//rxJavaHook & rxAndroidHook def
}

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Coding Example
JUnit rule for Rx
public class RxUnitTest { 
@Rule 
public RxJavaResetRule rxJavaResetRule = new RxJavaResetRule(); 
 
TestSubscriber testSubscriber; 
 
@Before 
testSubscriber = new TestSubscriber<>(); 
} 
}

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Coding Example
JUnit rule for Rx
public class RxUnitTest { 
@Rule 
public RxJavaResetRule rxJavaResetRule = new RxJavaResetRule(); 
 
TestSubscriber testSubscriber; 
 
@Before 
testSubscriber = new TestSubscriber<>(); 
} 
 
@Test 
public void testRx() { 
RxMethodKt.doSomeRxing().subscribe(testSubscriber); 
 
assertThat(testSubscriber, 
allOf(onNextEvents(hasSize(1)),
onNextEvents(hasItem(1L)), 
hasNoErrors(), 
isCompleted())); 
} 
}

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Coding Example
Junit rule in Spek
class RxTest : Spek({ 
on("testing something observed by an android schedulers") { 
var testSubscriber = TestSubscriber() 
beforeEach { testSubscriber = TestSubscriber() }
 
} 
})

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Coding Example
Junit rule in Spek
on("testing something observed by an android schedulers") { 
beforeEach { testSubscriber = TestSubscriber() } 
 
it("should be easily tested in unit test") { 
doSomeRxing().subscribe(testSubscriber)
 
allOf(hasNoErrors(), 
onNextEvents(hasSize(1)), 
isCompleted())) 
} 
} 
})

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Coding Example
Simple Rx function
inline fun Dsl.rxGroup(description: String, pending: Pending = Pending.No, 
crossinline body: Dsl.() -> Unit) { 
 
group(description, pending) { 
} 
}

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Coding Example
Simple Rx function
 
beforeEach { 
RxJavaPlugins.getInstance().reset() 
RxJavaPlugins.getInstance().registerSchedulersHook(rxJavaHook) 
 
RxAndroidPlugins.getInstance().reset() 
RxAndroidPlugins.getInstance().registerSchedulersHook(rxAndroidHook) 
} 
 
body() 
 
afterEach { 
 
} 
} 
}

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Coding Example
Simple Rx function
 
beforeEach { 
RxJavaPlugins.getInstance().registerSchedulersHook(rxJavaHook) 
 
RxAndroidPlugins.getInstance().registerSchedulersHook(rxAndroidHook) 
} 
 
body() 
 
afterEach { 
 
} 
} 
}
inline fun Dsl.onRx(description: String, crossinline body: Dsl.() -> Unit) = 
rxGroup("on $description", body = body)

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Coding Example
Simple Rx function
on("when testing something observed by an android schedulers") { 
 
 
isCompleted())) 
} 
} 
})

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Coding Example
Simple Rx function
onRx("when testing something observed by an android schedulers") { 
 
 
isCompleted())) 
} 
} 
})

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Thank you!

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Questions?
Simon Vergauwen
Android developer
[email protected]
@vergauwen_simon

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Cooking with Spek

Cooking with Spek

AppFoundry

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