import android.content.Context;
import android.widget.ImageView;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.junit.MockitoJUnitRunner;

import static junit.framework.Assert.assertNotNull;

@RunWith(MockitoJUnitRunner.class)
public class ParallaxViewTest {

    @Mock
    Context mContext;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void initWithContext() throws Exception {
        assertNotNull(mContext);
        ImageView imageView = new ImageView(mContext);
//        AppCompatImageView imageView = new AppCompatImageView(mContext);
    }
}

import android.content.Context;
import android.support.v7.widget.AppCompatImageView;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.junit.MockitoJUnitRunner;

import static junit.framework.Assert.assertNotNull;

@RunWith(MockitoJUnitRunner.class)
public class ParallaxViewTest {

    @Mock
    Context mContext;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void initWithContext() throws Exception {
        assertNotNull(mContext);
//        ImageView imageView = new ImageView(mContext);
        AppCompatImageView imageView = new AppCompatImageView(mContext);
    }
}

java.lang.NullPointerException
    at android.support.v7.widget.ResourcesWrapper.<init>(ResourcesWrapper.java:46)
    at android.support.v7.widget.TintResources.<init>(TintResources.java:34)
    at android.support.v7.widget.TintContextWrapper.<init>(TintContextWrapper.java:100)
    at android.support.v7.widget.TintContextWrapper.wrap(TintContextWrapper.java:68)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:60)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:56)
    at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:52)
    at example.views.ParallaxViewTest.initWithContext(ParallaxViewTest.java:30)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.mockito.internal.runners.DefaultInternalRunner$1.run(DefaultInternalRunner.java:68)
    at org.mockito.internal.runners.DefaultInternalRunner.run(DefaultInternalRunner.java:74)
    at org.mockito.internal.runners.StrictRunner.run(StrictRunner.java:39)
    at org.mockito.junit.MockitoJUnitRunner.run(MockitoJUnitRunner.java:161)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)