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Android Clean Architecture

Testing the remote source implementation

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The Remote layer allows us to abstract the remote source of data that our application uses. To ensure that this layer operates as intended through time, we're going to need tests. In this lesson, we'll be writing the test for our remote source implementation class.

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Interesting. Before watching your video I made an attempt at creating the getProjectsCompletes function and came up with the following code:
private fun stubServiceSearchRepositories(observable: Observable){
whenever(service.searchRepositories(any(), any(), any()))
.thenReturn(observable)
}

@Test
fun getProjectsCompletes() {
stubServiceSearchRepositories(Observable.just(ProjectDataFactory.makeProjectsResponse()))
val testObserver = remote.getProjects().test()
testObserver.assertComplete()
}

Notice that I did NOT stub the mapper class. When I ran the test it passed, so the method completed even without the mapper stub. Care to tell me why this is?

That's odd! Did you setup the mapper class as a mock within your test class? Usually this occurs when that hasn't been done, as then the mapper will just operate as a normal class and actually perform the mapping :)

Also your sample code link is pointing to the wrong class, but it looks like this repo does not contain this code (unfortunately)

Will update the link! It is on the repo at this point: https://github.com/hitherejoe/GithubTrending/blob/task/remote/Remote/src/test/java/co/joebirch/remote/ProjectsRemoteImplTest.kt - does this work for you?

Joe I'm working my way through this tutorial and I've gotten really confused. I think next time you create a tutorial, especially one this extensive you need to tell people at the end of every video to always look at the source code for any last minute changes. I've gotten all the way to "Testing the Projects Cache Implementation" and I could not get my tests to pass. While trying to troubleshoot my problem, I started to notice a LOT of changes that you've made to the code, mainly changing our getProjects calls from Observables to Flowables. Can you explain why you did this? Anway now I'm going back and changing all the various interfaces to Flowables and a bunch of stuff is breaking. My latest break is the ProjectsRemoteImplTest. The function stubGithubTrendingServiceSearchRepositories is returning an Observable, but the implementation class wants a Flowable.

Hey Steve, really sorry that you have seen these inconsistencies here. The course ended up being quite big and it looks like some things slipped through the net, I'm working on updating these shortly so that they are all a reflection of the videos

Hello Joe.

My tests doesn't work. This is the error stacktrace from the "Run" tab of Android Studio:

"/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java" ...

org.mockito.exceptions.base.MockitoException:
Cannot mock/spy class br.cericatto.remote.mapper.ProjectsResponseModelMapper
Mockito cannot mock/spy because :
- final class

at br.cericatto.remote.ProjectsRemoteImplTest.(ProjectsRemoteImplTest.kt:113)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

org.mockito.exceptions.base.MockitoException:
Cannot mock/spy class br.cericatto.remote.mapper.ProjectsResponseModelMapper
Mockito cannot mock/spy because :
- final class

at br.cericatto.remote.ProjectsRemoteImplTest.(ProjectsRemoteImplTest.kt:113)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

org.mockito.exceptions.base.MockitoException:
Cannot mock/spy class br.cericatto.remote.mapper.ProjectsResponseModelMapper
Mockito cannot mock/spy because :
- final class

at br.cericatto.remote.ProjectsRemoteImplTest.(ProjectsRemoteImplTest.kt:113)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

org.mockito.exceptions.base.MockitoException:
Cannot mock/spy class br.cericatto.remote.mapper.ProjectsResponseModelMapper
Mockito cannot mock/spy because :
- final class

at br.cericatto.remote.ProjectsRemoteImplTest.(ProjectsRemoteImplTest.kt:113)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Process finished with exit code 255

Hey Rodrigo,

could you try making ProjectsResponseModelMapper an open class and see if this helps? :)

>
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Lessons in Android Clean Architecture

Introduction to Clean Architecture
03:40
Joe Birch
GDE
Android and Clean Architecture
03:51
Joe Birch
GDE
Setting up a Multi-Module project
02:24
Joe Birch
GDE
Setting up the Domain layer module
02:24
Joe Birch
GDE
Creating the abstraction for our RxJava Observation Thread
02:02
Joe Birch
GDE
Setting up the Business Data for the Domain Layer
01:47
Joe Birch
GDE
Setting up the data access interface for the Domain Layer
01:49
Joe Birch
GDE
Setting up the Domain Layer Interactor classes
Pro
03:28
Joe Birch
GDE
Implementing the Get Projects use case
Pro
01:49
Joe Birch
GDE
Implementing the get Bookmarked Projects use case
Pro
01:33
Joe Birch
GDE
Implementing the Bookmark Project use case
Pro
01:57
Joe Birch
GDE
Implementing the UnBookmark Project use case (Domain layer 8)
Pro
02:03
Joe Birch
GDE
Testing the Get Projects use case
Pro
02:41
Joe Birch
GDE
Testing the Get Bookmarked Projects use case
Pro
02:04
Joe Birch
GDE
Testing the Bookmark Project use case
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02:10
Joe Birch
GDE
Testing the UnBookmark Project use case
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02:06
Joe Birch
GDE
Setting up the data module
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02:17
Joe Birch
GDE
Creating the data models for the data layer
Pro
02:48
Joe Birch
GDE
Creating the external source interfaces for our data layer
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02:24
Joe Birch
GDE
Creating the data layer store interface
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01:19
Joe Birch
GDE
Creating the data layer cache data store
Pro
01:21
Joe Birch
GDE
Creating the data layer remote data store
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01:39
Joe Birch
GDE
Creating the data store factory class
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01:24
Joe Birch
GDE
Creating the central access point for the data layer
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03:00
Joe Birch
GDE
Setting up the tests for the Data Layer
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00:46
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GDE
Testing the data store factory class
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01:39
Joe Birch
GDE
Testing the project entity mapper
Pro
01:18
Joe Birch
GDE
Testing the projects data repository
Pro
06:02
Joe Birch
GDE
Testing the projects cache data store
Pro
06:30
Joe Birch
GDE
Testing the projects remote data store
Pro
02:17
Joe Birch
GDE
Setting up the remote module
Pro
02:21
Joe Birch
GDE
Creating the data models for the remote layer
Pro
02:06
Joe Birch
GDE
Creating the Retrofit Service for the remote data source
Pro
01:58
Joe Birch
GDE
Creating the Retrofit Service Factory for the remote service interface
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02:52
Joe Birch
GDE
Creating the data model mapper for the Remote Layer
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01:59
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GDE
Creating the Remote Source implementation
Pro
01:55
Joe Birch
GDE
Setting up the Remote layer for testing
Pro
02:13
Joe Birch
GDE
Testing the remote model mapper class
Pro
01:39
Joe Birch
GDE
Testing the remote source implementation
Pro
05:09
Joe Birch
GDE
Setting up the Cache module
Pro
02:45
Joe Birch
GDE
Setting up the Cache layer data models
Pro
02:02
Joe Birch
GDE
Creating the database for the cache layer
Pro
01:34
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GDE
Creating the cached project Data Access Object
Pro
02:42
Joe Birch
GDE
Creating the Configuration Data Access Object
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02:07
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GDE
Creating the cache model mapper
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02:06
Joe Birch
GDE
Creating the Projects Cache data source Implementation
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03:57
Joe Birch
GDE
Setting up the tests for our cache layer
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01:17
Joe Birch
GDE
Testing the cached project model mapper
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01:44
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Testing the Cached project DAO
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04:33
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Testing the Configuration DAO
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02:05
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Testing the projects cache implementation
Pro
05:48
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Setting up the presentation module
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02:05
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Creating the data models for the presentation layer
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01:13
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Creating the data model mapper for the presentation layer
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01:26
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Creating the presentation state model
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01:39
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Creating the browse projects view model
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04:25
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Creating the bookmarked projects view model
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03:05
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Setting up the presentation module tests
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02:09
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Testing the view model mapper
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01:17
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Testing our Browse Projects View Model implementation
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04:36
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GDE
Testing our Browse Bookmarked Projects View Model implementation
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04:34
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GDE
Setting up the UI module
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02:22
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Creating the Post Execution Thread Implementation
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01:26
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GDE
Setting up the application class
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00:50
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Setting up the Dependency Injection for the UI module
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02:46
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GDE
Creating the UI modules Project representation
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00:50
Joe Birch
GDE
Creating the the Project model mapper for the UI module
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01:24
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GDE
Setting up the Browse Projects Activity
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01:08
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GDE
Configuring the DI for the project
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04:37
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GDE
Creating the Project item view
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01:51
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Creating the Browse Projects Adapter
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03:27
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Creating the browse bookmarked projects adapter
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03:54
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Creating the browse bookmarked projects activity
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03:18
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Tying together the browse projects and bookmarked projects activity
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02:30
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Setting up Unit Tests for the UI module
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00:54
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Test the project model mapper
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01:10
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Configuring the Dependency Injection for our User Interface tests
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Writing Espresso tests for the Browse Projects Activity
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03:15
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Writing Espresso tests for the Bookmarked Projects Activity
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Simplifying the work we have done
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05:14
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