Jacoco code coverage for android application using mockito library

Question

My android application uses the following config:

Gradle - 0.12.+

Contents of build.gradle file

buildscript {
repositories {
    mavenCentral()
}

dependencies {
    classpath 'com.android.tools.build:gradle:0.12.+'
}
}

repositories {
mavenLocal()
mavenCentral()
}

apply plugin: 'com.android.library'
apply plugin: "jacoco"



dependencies {

compile 'commons-collections:commons-collections:3.2.1'
compile 'org.slf4j:slf4j-android:1.6.1-RC1'

// dependency injection
compile('org.roboguice:roboguice:2.0') {
    exclude module: 'cglib'
    exclude module: 'aopalliance'
    exclude module: 'guice'
}

compile files('libs/guice-3.0-no_aop.jar')
compile 'javax.inject:javax.inject:1'



/*
 * Test dependencies.
 */
androidTestCompile 'com.google.dexmaker:dexmaker-mockito:1.0'

}

android {
buildToolsVersion "20.0"
compileSdkVersion 19

buildTypes {
    debug {
        runProguard false
        testCoverageEnabled true
    }
}

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_7
    targetCompatibility JavaVersion.VERSION_1_7
}

defaultConfig {
    minSdkVersion 8
    targetSdkVersion 19
    versionCode 100
    versionName "1.0.0"
}

/*
 * Workaround for packaging bug in Android Gradle plugin regarding duplicate files.
 */
packagingOptions {
    exclude 'META-INF/LICENSE.txt'
    exclude 'META-INF/NOTICE.txt'
    exclude 'LICENSE.txt'
}
}

All my tests run successfully when property testCoverageEnabled is set to false. On setting it to true, the following exception is thrown when running the tests

Caused by: java.lang.VerifyError: *** Some class ***
at dalvik.system.DexFile.defineClass(Native Method)
at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:211)
at dalvik.system.DexPathList.findClass(DexPathList.java:313)
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:51)
at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
at java.lang.ClassLoader.loadClass(ClassLoader.java:461)

The error happens on the line when mocks are initialised within the tests.

Has anyone managed to generate code coverage metrics for android application which uses mockito library for testing?

Mahesh · Accepted Answer · 2014-08-22 10:26:04Z

1

The following link was very useful in explaining the problem I encountered: http://www.androidpuzzles.com/168_17620080/

I subsequently switched the source and target compatibility settings to Java 1.5 and I was able to run the unit and UI tests (which used both mockito and espresso) and generate code coverage report using Jacoco.

If I had to retain Java 1.7 settings, the workaround would have been to change the scope of private methods in the class being tested to either protected or public scope. This would have then allowed me to generate the code coverage report (overcoming the issue as identified in the link included).

edited Aug 22, 2014 at 10:26

answered Jul 30, 2014 at 5:37

Mahesh

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Comments

binarycreations · Accepted Answer · 2014-07-28 07:20:03Z

0

Jacoco coverage support has been added to the gradle plugin since 0.10.0. See http://tools.android.com/tech-docs/new-build-system.

Not quite sure I understand why you have such a complex gradle file.

edited Jul 28, 2014 at 7:20

answered Jul 27, 2014 at 22:07

binarycreations

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3 Comments

Mahesh Over a year ago

The gradle file isn't complex. The only bits of interests are the place where I apply the jacoco plugin and subsequently enable code coverage in the debug build type. However, the jacoco stuff doesn't seem to work well with dexmaker mockito version and that's what my question was more about.

binarycreations Over a year ago

I'm not sure you need to apply the jacoco plugin. I'll have to dig up a script to see what I had to do. However there are some samples available which might help.

Mahesh Over a year ago

Ignoring the part about applying the plugin for jacoco, as soon as I enable code coverage, my tests, which use mockito, start failing and that's the underlying issue...

Yuvi · Accepted Answer · 2014-09-10 08:55:20Z

0

You need to compile against Java 1.5 version.

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_5
    targetCompatibility JavaVersion.VERSION_1_5
}

answered Sep 10, 2014 at 8:55

Yuvi

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Comments

Some Noob Student · Accepted Answer · 2015-01-16 22:32:20Z

0

https://code.google.com/p/android/issues/detail?id=69174

This issue has been fixed in build tools version 21+

android {
buildToolsVersion "21.1.2"
compileSdkVersion 19

...
}

Upgrade build tools to 21+ to retain Java 1.7 compatibility.

answered Jan 16, 2015 at 22:32

Some Noob Student

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