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.

Answer 1

You need to add following to your build.gradle file for instrumentation test:

androidTestApt 'com.google.dagger:dagger-compiler:<version>' 

or for JUnit test:

testApt 'com.google.dagger:dagger-compiler:<version>' 

This is required to generate Dagger code for your test components.

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EDIT:

If you are using jack tool chain then add following for android test:

androidTestAnnotationProcessor 'com.google.dagger:dagger-compiler:<version>' 

for JUnit tests:

testAnnotationProcessor 'com.google.dagger:dagger-compiler:<version>' 

---

EDIT:

In case you are using kotlin-kapt for Kotlin code use following:

kaptAndroidTest 'com.google.dagger:dagger-compiler:<version>' 

or for JUnit test:

kaptTest 'com.google.dagger:dagger-compiler:<version>' 

Check this link for more info.