Need to mock Log functions

I added logging in some of the methods I was testing on my ViewModel. In order for the test to run properly, I needed to add the following to build.gradle

android {
    // ...
    testOptions { 
        unitTests.returnDefaultValues = true
    }
}

http://tools.android.com/tech-docs/unit-testing-support#TOC-Method-…-not-mocked.-