How to use new gradle experimental in Android Studio - android-studio

Question

I made a very hello world with Android Studio NDK. As instructed from http://tools.android.com/tech-docs/new-build-system/gradle-experimental, I copied exactly the same (left only some newer build tool version), but the error always appears:
Error:(49, 1) A problem occurred evaluating project ':app'.
Could not find method testCompile() for arguments [junit:junit:4.12] on project ':app'.
Could you tell me what's problem with my HelloWorld?
Here's my app build.gradle
apply plugin: "com.android.model.application"
model {
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig.with {
applicationId = "com.android.services.testjni"
minSdkVersion.apiLevel = 15
targetSdkVersion.apiLevel = 23
versionCode = 1
versionName = "1.0"
buildConfigFields.with {
create() {
type = "int"
name = "VALUE"
value = "1"
}
}
}
android.buildTypes {
release {
minifyEnabled = false
proguardFiles.add(file("proguard-rules.pro"))
}
}
android.productFlavors {
create("flavor1") {
applicationId = "com.app"
}
}
// Configures source set directory.
android.sources {
main {
java {
source {
srcDir "src"
}
}
}
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
}
and build.gradle
buildscript {
repositories {
jcenter()
}
dependencies {
classpath "com.android.tools.build:gradle-experimental:0.2.1"
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
and gradle-wrapper.properties
#Fri Nov 27 17:00:16 ICT 2015
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.5-all.zip

Answer 1

AFAIK, android plugin doesn't have a testCompile configuration, which is one from gradle's java plugin, but has an androidTestCompile. So, you have to rename it in your dependencies, as:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
}