使用实际实现（类）进行单元测试

Question

I'm wondering if there is a way to avoid mocking some classes. I'm working on a bigger unit testing thing related with notifications. I run into multiple issues which I was able to fix mostly.

Now I'm stuck with some classes like PendingIntent , Notification.Builder and probably even Notification . I'm using the compat library so I cannot inject my code to mock everything. I still have no idea how to mock a builder pattern.

Could you give me a reference how I can avoid that Android Studio injects the dummy objects which return null on every call? I would like to white list some classes. I mean I know that some classes are easy to mock like Intent or SharedPreferences .

Answer 1

I found a great library called unmock which exactly does what I need. Here is my example configuration which I need for my tests:

unMock {
    // URI to download the android-all.jar from. e.g. https://oss.sonatype.org/content/groups/public/org/robolectric/android-all/
    downloadFrom 'https://oss.sonatype.org/content/groups/public/org/robolectric/android-all/4.3_r2-robolectric-0/android-all-4.3_r2-robolectric-0.jar'

    keep 'android.os.Bundle'
    keepStartingWith 'android.content.Intent'
    keepStartingWith 'android.content.ComponentName'
    keep 'android.app.Notification'
    keepStartingWith 'android.app.Notification$'
    keep 'android.net.Uri'
    keepStartingWith 'android.widget.RemoteViews'
    keep 'android.util.SparseIntArray'
    keep 'android.util.SparseArray'
    keep 'com.android.internal.util.ArrayUtils'
    keep 'com.android.internal.util.GrowingArrayUtils'
    keep 'libcore.util.EmptyArray'

    keepStartingWith "libcore."
    keepStartingWith "com.android.internal.R"
    keepStartingWith "com.android.internal.util."
    keepAndRename "java.nio.charset.Charsets" to "xjava.nio.charset.Charsets"
}

The PendingIntent s cannot been used since it required some native implementations however I could mock the relevant parts so I can unit test them anyway.