Develop Reference

NoClassDefFoundError when running unit test with Gradle task

I have a project using dynamic feature module, and I want to run my unit test in feature module via gradle task (for my CI purpose):
./gradlew :feature_product:test
But it always gives me NoClassDefFoundError for tests that have dependencies on classes from the base module:
com.example.android.feature.product.ProductViewTest > on vote change to negative FAILED
java.lang.NoClassDefFoundError: app.BaseView
ProductView class from the feature module extends BaseView from the base module.
Oddly, it succeeds when run in Android Studio, it works fine.
Then I notice something different in the logs, when I run via command line and when I run Android Studio. The first line in the Android Studio is generateDebugSources, something which absent when I run ./gradlew test
Executing tasks: [:lib_ui:generateDebugSources, ...]
How do I fix this? Does Android Studio has different command with the provided command ./gradlew test when I press Ctrl+Shift+R ?

After searching further about this issue, I found it also being reported in the android-test and app-bundle-samples projects and there is also an issue in the issue tracker.
It turns out this issue fixed in the Android Gradle Plugin 4.1.0 as per comment in the issue tracker.
If you don't want to update AGP to 4.1.0 which is still in alpha, adding this to the feature module's build.gradle fixed the issue for me, as per this comment:
testRuntimeOnly(files("$projectDir/../b_app/build/intermediates/app_classes/debug/classes.jar"))

If it is a missing task that you believe is necessary then calling it first like below should do the trick:
./gradlew :lib_ui:generateDebugSources :feature_product:test
I would even go full on and assemble the dependencies if necessary though that might take more time:
./gradlew :lib_ui:assemble :feature_product:assemble :feature_product:test

Android instrumented test coverage report on Jenkins - Incompatible JaCoCo version

I've got a problem when I launch a build on Jenkins. I would like to have the coverage report of my instrumented tests in Jenkins but it fails due to an incompatible version of Jacoco.
In my Android project, I've added the line apply plugin: 'jacoco' in the app/build.gradle file.
My Android project use the gradle plugin 3.0.1 version.
In Jenkins, I set up my application like this:
In Jenkins, I've installed the JaCoCo plugin 3.0.1 version.
When I run a build in Jenkins with this configuration, it goes well but I don't get the coverage report of the instrumented tests.
So, I change the settings like this:
When I run a build, in the Console output, I get the following message:
ERROR: Step ‘Record JaCoCo coverage report’ aborted due to exception:
org.jacoco.core.data.IncompatibleExecDataVersionException: Cannot read execution data version 0x1006. This version of JaCoCo uses execution data version 0x1007.
On the Jenkins wiki, I read that there is a compatibility problem between different versions of Jenkins and JaCoCo: https://wiki.jenkins.io/display/JENKINS/JaCoCo+Plugin.
So, I tried to use a 7.5+ version in my Android project by adding this line in the build.gradle file:
jacoco {
toolVersion '0.7.5+'
}
But it still fails... :-(
I don't understand why it works with the *.exec files only but not when I add the *.ec files.
Someone see what I missed?

Generating Code Coverage Report with Android Studio 1.0

I'm trying to generate a Code Coverage report using Android Studio and the gradle plugin.
I've done alot of research and seem to have found that using the jacoco plugin is the way to do it. I currently only have instrumentation and junit tests which I run with the gradle wrapper using gradle 1.13 that I execute with ./gradlew connectedCheck.
The appropriate part of my gradle file looks like this:
mock.initWith(debug)
mock {
testCoverageEnabled true
}
Upon doing so it generates a coverage.ec file that I have no idea what to do with. Apparently you need a coverage.em file for emma to compile it but I'm not sure where to generate that.
I've also tried this without a gradle wrapper using gradle 2.2.1
According to http://gradle.org/docs/current/userguide/jacoco_plugin.html#jacoco-application-output it should be generating an html file with the coverage report in it but I am unable to do so. Does anyone have any great tutorials or a way to use the coverage.ec file?

Code Coverage in Android Studio with Sonar & Gradle

I am trying to get code coverage working for a new empty Android project using Gradle in Android Studio.
I managed to get Sonar working but I can't seem to figure it out for the code coverage. (never done anything like it before)
I have looked at JaCoCo but it is not compatible with Android. The same goes for Cobertura. And it seems Emma doesn't work with Gradle yet.
I am using Gradle 1.11, Android Studio 0.5.1 and Sonar Runner 2.3

JaCoCo is now supported in Android Studio when using build tools version 0.10.0
New Build System
Release Notes:
0.10.0
....
Test code coverage support with Jacoco
Enable in the tested Build Type with testCoverageEnabled = true
HTML and XML Report generated in build/reports/coverage
Configure version of Jacoco with
android {
jacoco {
version = '0.6.2.201302030002'
}
}
Known issue: This is not compatible with using Dagger.
.....

Please refer to this answer. https://stackoverflow.com/a/25029501/973483
You should be able to use jacoco and enable code coverage on android project as long as you are using Java version 1.5. It should work with mockito, dagger and espresso.
If you, however, switch to Java 1.6 or above, you will have issues enabling code coverage

Android Gradle two instrumentation test suites

I am trying to set up a second instrumentation test suite for an android project. The project builds under Gradle and the ADT plugin.
I have instrumentationTestSuiteA and instrumentationTestSuiteBand buildTypeAand buildTypeB.
I would like instrumentationTestSuiteA to run on buildTypeA, and instrumentationTestSuiteB on buildTypeB.
How could I accomplish this?