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There are some conflicts on espresso dependencies so just include com.android.support.test.espresso:espresso-contrib:2.2
with some excludes.
androidTestCompile 'com.android.support.test:runner:0.3'
androidTestCompile 'com.android.support.test:rules:0.3'
androidTestCompile 'com.android.support:support-annotations:22.2.0'
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2'
androidTestCompile ('com.android.support.test.espresso:espresso-contrib:2.2'){
exclude group: 'com.android.support', module: 'appcompat'
exclude group: 'com.android.support', module: 'support-v4'
exclude module: 'recyclerview-v7'
}
And use the proguard file:
# Assertj
-dontwarn org.assertj.core.**
-dontwarn org.junit.**
-dontwarn java.beans.**
-dontwarn sun.reflect.**
-dontwarn android.test.**
-dontwarn net.bytebuddy.**
-keep class java.beans.** { *; }
-dontwarn retrofit.MockRestAdapter.**
-dontwarn rx.**
-dontwarn org.hamcrest.**
# If using retrofit
-dontwarn com.squareup.**
-keepclassmembers class java.beans.xxxx { public *; }
-keep class rx.** { *; }
-keepclassmembers class rx.xxxx { public *; }
-keepclassmembers class org.assertj.xxxx { public *; }
-keepclassmembers class org.junit.xxxx { public *; }
-keepclassmembers class java.beans.xxxx { public *; }
-keepclassmembers class android.test.xxxx { public *; }
-keepclassmembers class org.joda.time.xxxx { public *; }
-keep class org.joda.time.** { *; }