Is it possible to mock getter and setter of the property by Mockito? Something like this:
#Test
fun three() {
val m = mock<Ddd>() {
// on { getQq() }.doReturn("mocked!")
}
assertEquals("mocked!", m.qq)
}
open class Ddd {
var qq : String = "start"
set(value) {
field = value + " by setter"
}
get() {
return field + " by getter"
}
}
To mock getter just write:
val m = mock<Ddd>()
`when`(m.qq).thenReturn("42")
also i suggest to use mockito-kotlin, to use useful extensions and functions like whenever:
val m = mock<Ddd>()
whenever(m.qq).thenReturn("42")
Complementing IRus' answer, you could also use the following syntax:
val mockedObj = mock<SomeClass> {
on { funA() } doReturn "valA"
on { funB() } doReturn "valB"
}
or
val mockedObj = mock<SomeClass> {
on(it.funA()).thenReturn("valA")
on(it.funB()).thenReturn("valB")
}
Related
So I have this class:
class Sigil {
constructor(name = "", type = "", func = (oppositeCard, oppositeCardLane) => { }) {
this.name = name;
this.type = type;
this.function = func
}
Activate(oppositeCard, oppositeCardLane) {
};
}
var fly = new Sigil("Fly", "OnAttack", (oppositeCard, oppositeCardLane) => {
oppositeCard = cardLib.blank;
return oppositeCard;
})
What I wan to do is use that function that I put in using the constructor. So like i want to call the "func" function using the Activate method
All you do is call this.function.
class Sigil {
...
Activate(){
this.function();
}
...
}
Let say we have an object:
#:checkDirty
class Test {
var a:Int;
var b(default, default):String;
var c(get, set):Array<Int>;
public function new() {
...
}
public function get_c() {
...
}
public function set_c(n) {
...
}
}
Could we write a macro checkDirty so that any change to field/properties would set property dirty to true. Macro would generate dirty field as Bool and clearDirty function to set it to false.
var test = new Test();
trace(test.dirty); // false
test.a = 12;
trace(test.dirty); // true
test.clearDirty();
trace(test.dirty); //false
test.b = "test"
trace(test.dirty); //true
test.clearDirty();
test.c = [1,2,3];
trace(test.dirty); //true
Just to note - whenever you consider proxying access to an object, in my experience, there are always hidden costs / added complexity. :)
That said, you have a few approaches:
First, if you want it to be pure Haxe, then either a macro or an abstract can get the job done. Either way, you're effectively transforming every property access into a function call that sets the value and also sets dirty.
For example, an abstract using the #:resolve getter and setter can be found in the NME source code, replicated here for convenience:
#:forward(decode,toString)
abstract URLVariables(URLVariablesBase)
{
public function new(?inEncoded:String)
{
this = new URLVariablesBase(inEncoded);
}
#:resolve
public function set(name:String, value:String) : String
{
return this.set(name,value);
}
#:resolve
public function get(name:String):String
{
return this.get(name);
}
}
This may be an older syntax, I'm not sure... also look at the operator overloading examples on the Haxe manual:
#:op(a.b) public function fieldRead(name:String)
return this.indexOf(name);
#:op(a.b) public function fieldWrite(name:String, value:String)
return this.split(name).join(value);
Second, I'd just point out that if the underlying language / runtime supports some kind of Proxy object (e.g. JavaScript Proxy), and macro / abstract isn't working as expected, then you could build your functionality on top of that.
I wrote a post (archive) about doing this kind of thing (except for emitting events) before - you can use a #:build macro to modify class members, be it appending an extra assignment into setter or replacing the field with a property.
So a modified version might look like so:
class Macro {
public static macro function build():Array<Field> {
var fields = Context.getBuildFields();
for (field in fields.copy()) { // (copy fields so that we don't go over freshly added ones)
switch (field.kind) {
case FVar(fieldType, fieldExpr), FProp("default", "default", fieldType, fieldExpr):
var fieldName = field.name;
if (fieldName == "dirty") continue;
var setterName = "set_" + fieldName;
var tmp_class = macro class {
public var $fieldName(default, set):$fieldType = $fieldExpr;
public function $setterName(v:$fieldType):$fieldType {
$i{fieldName} = v;
this.dirty = true;
return v;
}
};
for (mcf in tmp_class.fields) fields.push(mcf);
fields.remove(field);
case FProp(_, "set", t, e):
var setter = Lambda.find(fields, (f) -> f.name == "set_" + field.name);
if (setter == null) continue;
switch (setter.kind) {
case FFun(f):
f.expr = macro { dirty = true; ${f.expr}; };
default:
}
default:
}
}
if (Lambda.find(fields, (f) -> f.name == "dirty") == null) fields.push((macro class {
public var dirty:Bool = false;
}).fields[0]);
return fields;
}
}
which, if used as
#:build(Macro.build())
#:keep class Some {
public function new() {}
public var one:Int;
public var two(default, set):String;
function set_two(v:String):String {
two = v;
return v;
}
}
Would emit the following JS:
var Some = function() {
this.dirty = false;
};
Some.prototype = {
set_two: function(v) {
this.dirty = true;
this.two = v;
return v;
}
,set_one: function(v) {
this.one = v;
this.dirty = true;
return v;
}
};
I have a data provider that has an Observable<Int> as part of the public API. My class under test maps this into a Observable<String>.
How do I create a mock so that it can send out different values on the data provider's observable?
I can do it using a Fake object, but that is a lot of work that I don't think is necessary with MockK.
Simplified code:
interface DataProvider {
val numberData:Observable<Int>
}
class FakeDataProvider():DataProvider {
private val _numberData = BehaviorSubject.createDefault(0)
override val numberData = _numberData.hide()
// Note: the internals of this class cause the _numberData changes.
// I can use this method to fake the changes for this fake object,
// but the real class doesn't have this method.
fun fakeNewNumber( newNumber:Int ) {
_numberData.onNext( newNumber )
}
}
interface ClassUnderTest {
val stringData:Observable<String>
}
class MyClassUnderTest( dataProvider: DataProvider ):ClassUnderTest {
override val stringData = dataProvider.numberData.map { "string = " + it.toString() }
}
class MockKTests {
#Test fun testUsingFakeDataProvider() {
val fakeDataProvider = FakeDataProvider()
val classUnderTest = MyClassUnderTest( fakeDataProvider )
val stringDataTestObserver = TestObserver<String>()
classUnderTest.stringData.subscribe( stringDataTestObserver )
fakeDataProvider.fakeNewNumber( 1 )
fakeDataProvider.fakeNewNumber( 2 )
fakeDataProvider.fakeNewNumber( 3 )
// Note we are expecting the initial value of 0 to also come through
stringDataTestObserver.assertValuesOnly( "string = 0", "string = 1","string = 2","string = 3" )
}
// How do you write the mock to trigger the dataProvider observable?
#Test fun testUsingMockDataProvider() {
val mockDataProvider = mockk<DataProvider>()
// every { ... what goes here ... } just Runs
val classUnderTest = MyClassUnderTest( mockDataProvider )
val stringDataTestObserver = TestObserver<String>()
classUnderTest.stringData.subscribe( stringDataTestObserver )
// Note we are expecting the initial value of 0 to also come through
stringDataTestObserver.assertValuesOnly( "string = 0", "string = 1","string = 2","string = 3" )
}
}
Try to use following:
every { mockDataProvider.numberData } answers { Observable.range(1, 3) }
And maybe you need to use another way to make a mock object, like this:
val mockDataProvider = spyk(DataProvider())
Do something like this where we create an observable fakelist of the observable
var fakeList :List<Quiz> = (listOf<Quiz>(
Quiz("G1","fromtest","","",1)
))
var observableFakelist = Observable.fromArray(fakeList)
you can then return your observableFakelist.
This code is based on Coroutines guide example: Fan-out
val inputProducer = produce<String>(CommonPool) {
(0..inputArray.size).forEach {
send(inputArray[it])
}
}
val resultChannel = Channel<Result>(10)
repeat(threadCount) {
launch(CommonPool) {
inputProducer.consumeEach {
resultChannel.send(getResultFromData(it))
}
}
}
What is the right way to create a Sequence<Result> that will provide results?
You can get the channel .iterator() from the ReceiveChannel and then wrap that channel iterator into a Sequence<T>, implementing its normal Iterator<T> that blocks waiting for the result on each request:
fun <T> ReceiveChannel<T>.asSequence(context: CoroutineContext) =
Sequence {
val iterator = iterator()
object : AbstractIterator<T>() {
override fun computeNext() = runBlocking(context) {
if (!iterator.hasNext())
done() else
setNext(iterator.next())
}
}
}
val resultSequence = resultChannel.asSequence(CommonPool)
I had the same problem, and in the end I came up with this rather unusual/convoluted solution:
fun Channel<T>.asSequence() : Sequence<T> {
val itr = this.iterator()
return sequence<Int> {
while ( runBlocking {itr.hasNext()} ) yield( runBlocking<T> { itr.next() } )
}
}
I do not think it is particular efficient (go with the one provided by #hotkey), but it has a certain appeal to me at least.
I have class in groovy
class WhsDBFile {
String name
String path
String svnUrl
String lastRevision
String lastMessage
String lastAuthor
}
and map object
def installFiles = [:]
that filled in loop by
WhsDBFile dbFile = new WhsDBFile()
installFiles[svnDiffStatus.getPath()] = dbFile
now i try to sort this with custom Comparator
Comparator<WhsDBFile> whsDBFileComparator = new Comparator<WhsDBFile>() {
#Override
int compare(WhsDBFile o1, WhsDBFile o2) {
if (FilenameUtils.getBaseName(o1.name) > FilenameUtils.getBaseName(o2.name)) {
return 1
} else if (FilenameUtils.getBaseName(o1.name) > FilenameUtils.getBaseName(o2.name)) {
return -1
}
return 0
}
}
installFiles.sort(whsDBFileComparator);
but get this error java.lang.String cannot be cast to WhsDBFile
Any idea how to fix this? I need to use custom comparator, cause it will be much more complex in the future.
p.s. full source of sample gradle task (description of WhsDBFile class is above):
project.task('sample') << {
def installFiles = [:]
WhsDBFile dbFile = new WhsDBFile()
installFiles['sample_path'] = dbFile
Comparator<WhsDBFile> whsDBFileComparator = new Comparator<WhsDBFile>() {
#Override
int compare(WhsDBFile o1, WhsDBFile o2) {
if (o1.name > o2.name) {
return 1
} else if (o1.name > o2.name) {
return -1
}
return 0
}
}
installFiles.sort(whsDBFileComparator);
}
You can try to sort the entrySet() :
def sortedEntries = installFiles.entrySet().sort { entry1, entry2 ->
entry1.value <=> entry2.value
}
you will have a collection of Map.Entry with this invocation. In order to have a map, you can then collectEntries() the result :
def sortedMap = installFiles.entrySet().sort { entry1, entry2 ->
...
}.collectEntries()
sort can also take a closure as parameter which coerces to a Comparator's compare() method as below. Usage of toUpper() method just mimics the implementation of FilenameUtils.getBaseName().
installFiles.sort { a, b ->
toUpper(a.value.name) <=> toUpper(b.value.name)
}
// Replicating implementation of FilenameUtils.getBaseName()
// This can be customized according to requirement
String toUpper(String a) {
a.toUpperCase()
}