Dagger not generating components for /test class

Question

I am following the guide here: https://github.com/ecgreb/dagger-2-testing-demo

I have the following setup in my app/src/main (the injection and @Provides code omitted):

public class FlingyApplication extends Application {
    @Singleton
    @Component(modules = { FlingyModule.class })
    public interface FlingyComponent
}

@Module
public class FlingyModule

In app/src/test:

public class TestFlingyApplication extends Application {
    @Singleton
    @Component(modules = { TestFlingyModule.class })
    public interface TestFlingyComponent extends FlingyComponent
}

@Module
public class TestFlingyModule

So far, it is nearly identical to the example github. When dagger goes to generate the code for the Component builders in src/main, they generate properly. Dagger does not, however, generate code for the Component builders in src/test.

My main build.gradle:

dependencies {
    classpath 'com.android.tools.build:gradle:2.1.0-alpha3'

    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.5.1'
}

My app/build.gradle

apply plugin: 'com.android.application'
apply plugin: 'com.neenbedankt.android-apt'


android {
    # There is obviously more in here, but this is the custom part:
    packagingOptions {
        exclude 'META-INF/services/javax.annotation.processing.Processor'
    }
}

dependencies {
    compile 'com.squareup:otto:1.3.8'
    compile 'com.android.support:cardview-v7:23.1.1'
    compile 'com.android.support:recyclerview-v7:23.1.1'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.android.support:design:23.1.1'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.jakewharton:butterknife:7.0.1'

    compile 'com.google.dagger:dagger:2.0.1'
    apt 'com.google.dagger:dagger-compiler:2.0.1'
    compile 'javax.annotation:javax.annotation-api:1.2'

    compile 'io.reactivex:rxandroid:1.1.0'
    compile 'io.reactivex:rxjava:1.1.0'

    testCompile 'com.neenbedankt.gradle.plugins:android-apt:1.4'
    testCompile 'junit:junit:4.12'
    testCompile 'org.robolectric:robolectric:3.0'
    testCompile 'org.mockito:mockito-core:1.10.19'
}

So when I build, I get the DaggerFlingyApplication_FlingyComponent class, but not the DaggerTestFlingyApplication_TestFlingyComponent

Something interesting I noticed is that if I switch the line:

apt 'com.google.dagger:dagger-compiler:2.0.1'
# TO
compile 'com.google.dagger:dagger-compiler:2.0.1'

I see the following when I run ./gradlew compileDebugUnitTestSources:

:app:compileDebugJavaWithJavac
Note: /app/build/generated/source/apt/debug/com/jy/flingy/DaggerFlingyApplication_FlingyComponent.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
:app:preDebugUnitTestBuild UP-TO-DATE
:app:prepareDebugUnitTestDependencies
:app:compileDebugUnitTestJavaWithJavac
Note: /app/build/intermediates/classes/test/debug/com/jy/flingy/DaggerTestFlingyApplication_TestFlingyComponent.java uses unchecked or unsafe operations.

I don't know why it builds to intermediates and I assume that I need the build.gradle file to use apt instead of compile, but I can't seem to figure out how to get this to work. I know that it's absolutely possible.

user_538408 · Answer

If you added kaptAndroidTest for dagger dependencies and still not getting test components when rebuild your project, try running assembleAndroidTest.

user_1675821 · Answer

Adding to the above solution and adding the testKapt and androidTestKapt for dagger, I had the problem that my modules and components had the wrong imports as a result of missing imports

e.g

 import android.support.test.espresso.core.deps.dagger.Module
 import android.support.test.espresso.core.deps.dagger.Module

instead of

import dagger.Module
import dagger.Provides

Hope this helps

user_8110017 · Answer

Hi even after adding all gradle dependenices and annotations if it still doesnt work then you need to run assembleAndroidTest gradle script for this. Simply make an empty test case and run it. It will do the job for you. Cheers

user_462534 · Answer

If you are using kotlin use "kaptAndroidTest" to generate dagger component for android tests in your build.gradle file.

user_905089 · Answer

I ran ./gradlew build from the command line and got information about a missing Provides method that Android Studio was not telling me about.

Dagger not generating components for /test class

8 Answers