Hitung Luas Unit Test

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "24.0.2"
    defaultConfig {
        applicationId "io.github.sendz.distanceconverter"
        minSdkVersion 22
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.0.0'
    testCompile 'junit:junit:4.12'
    testCompile group: 'org.mockito', name: 'mockito-core', version: '2.2.3'
}

MainPresenterTest.java

package io.github.sendz.hitungluas;

import org.junit.Before;
import org.junit.Test;

import static junit.framework.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

public class MainPresenterTest {

    private MainPresenter presenter;
    private MainView view;

    @Before
    public void setUp() throws Exception {
        view = mock(MainView.class);
        presenter = new MainPresenter(view);
    }

    @Test
    public void testHitungLuasPersegi() throws Exception {
        int luas = presenter.luasPersegi(4, 3);
        assertEquals(12, luas);
    }

    @Test
    public void testHitungLuasDanCekApakahHasilDitampilkanDiActivity() throws Exception {
        presenter.hitungLuas(4, 3);
        verify(view).tampilkanLuas(any(MainModel.class));
    }
}