Unit/Instrumentation tests Android Gradle. Instrumentation tests won't run

Question

I have Tests set up in an Android project in Android Studio. I have a Unit test class with tests and an Instrumentation test class with tests. When I run gradlew connectedAndroidTest the unit tests run fine but the instrumentation tests are not run.

Here is my project structure

root - app - src - androidTest - java - packagename - UnitTest class - InstrumentationTest class

The unit test class extends TestCase. The instrumentation test class extends ActivityInstrumentationTestCase2

An example test in the instrumentation test class is

public void testJSONReturnsString() {

    String json = JSON.getJSonFeed(getActivity().getApplicationContext(),     "http://foo.bar");
    assertNotNull(json);
}

In my build.gradle I have testInstrumentationRunner "android.test.InstrumentationTestRunner"

in the defaultConfig section

Does anyone know why the Instrumentation test class wouldn't run?

Answer 1

In the end it was because I didn't have a default constructor in my instrumentation class!