MP1_CalebFontenot

Book Files/21_UnitTesting/BeatBox/app/.gitignore

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+/build

Book Files/21_UnitTesting/BeatBox/app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion '25.0.2'
+    defaultConfig {
+        applicationId "com.bignerdranch.android.beatbox"
+        minSdkVersion 19
+        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'
+        }
+    }
+    dataBinding {
+        enabled = true
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.3.0'
+    testCompile 'junit:junit:4.12'
+    compile 'com.android.support:recyclerview-v7:25.3.0'
+    testCompile 'org.mockito:mockito-core:2.2.1'
+    testCompile 'org.hamcrest:hamcrest-junit:2.0.0.0'
+}

Book Files/21_UnitTesting/BeatBox/app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/bphillips/devtools/android-sdk-macosx/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

Book Files/21_UnitTesting/BeatBox/app/src/androidTest/java/com/bignerdranch/android/beatbox/ExampleInstrumentedTest.java

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+package com.bignerdranch.android.beatbox;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.bignerdranch.android.beatbox", appContext.getPackageName());
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.bignerdranch.android.beatbox">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".BeatBoxActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

Book Files/21_UnitTesting/BeatBox/app/src/main/java/com/bignerdranch/android/beatbox/BeatBox.java

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+package com.bignerdranch.android.beatbox;
+
+import android.content.Context;
+import android.content.res.AssetFileDescriptor;
+import android.content.res.AssetManager;
+import android.media.AudioManager;
+import android.media.SoundPool;
+import android.util.Log;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class BeatBox {
+    private static final String TAG = "BeatBox";
+
+    private static final String SOUNDS_FOLDER = "sample_sounds";
+    private static final int MAX_SOUNDS = 5;
+
+    private AssetManager mAssets;
+    private List<Sound> mSounds = new ArrayList<>();
+    private SoundPool mSoundPool;
+
+    public BeatBox(Context context) {
+        mAssets = context.getAssets();
+        // This old constructor is deprecated, but we need it for
+        // compatibility.
+        //noinspection deprecation
+        mSoundPool = new SoundPool(MAX_SOUNDS, AudioManager.STREAM_MUSIC, 0);
+        loadSounds();
+    }
+
+    public void play(Sound sound) {
+        Integer soundId = sound.getSoundId();
+        if (soundId == null) {
+            return;
+        }
+        mSoundPool.play(soundId, 1.0f, 1.0f, 1, 0, 1.0f);
+    }
+
+    public void release() {
+        mSoundPool.release();
+    }
+
+    private void loadSounds() {
+        String[] soundNames;
+        try {
+            soundNames = mAssets.list(SOUNDS_FOLDER);
+            Log.i(TAG, "Found " + soundNames.length + " sounds");
+        } catch (IOException ioe) {
+            Log.e(TAG, "Could not list assets", ioe);
+            return;
+        }
+
+        for (String filename : soundNames) {
+            try {
+                String assetPath = SOUNDS_FOLDER + "/" + filename;
+                Sound sound = new Sound(assetPath);
+                load(sound);
+                mSounds.add(sound);
+            } catch (IOException ioe) {
+                Log.e(TAG, "Could not load sound " + filename, ioe);
+            }
+        }
+    }
+
+    private void load(Sound sound) throws IOException {
+        AssetFileDescriptor assetFd = mAssets.openFd(sound.getAssetPath());
+        int soundId = mSoundPool.load(assetFd, 1);
+        sound.setSoundId(soundId);
+    }
+
+    public List<Sound> getSounds() {
+        return mSounds;
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/main/java/com/bignerdranch/android/beatbox/BeatBoxActivity.java

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+package com.bignerdranch.android.beatbox;
+
+import android.support.v4.app.Fragment;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+
+public class BeatBoxActivity extends SingleFragmentActivity {
+    @Override
+    protected Fragment createFragment() {
+        return BeatBoxFragment.newInstance();
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/main/java/com/bignerdranch/android/beatbox/BeatBoxFragment.java

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+package com.bignerdranch.android.beatbox;
+
+import android.databinding.DataBindingUtil;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.bignerdranch.android.beatbox.databinding.FragmentBeatBoxBinding;
+import com.bignerdranch.android.beatbox.databinding.ListItemSoundBinding;
+
+import java.util.List;
+
+
+public class BeatBoxFragment extends Fragment {
+
+    private BeatBox mBeatBox;
+
+    public static BeatBoxFragment newInstance() {
+        return new BeatBoxFragment();
+    }
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setRetainInstance(true);
+        
+        mBeatBox = new BeatBox(getActivity());
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        FragmentBeatBoxBinding binding = DataBindingUtil
+                .inflate(inflater, R.layout.fragment_beat_box, container, false);
+
+        binding.recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 3));
+        binding.recyclerView.setAdapter(new SoundAdapter(mBeatBox.getSounds()));
+
+        return binding.getRoot();
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        mBeatBox.release();
+    }
+
+    private class SoundHolder extends RecyclerView.ViewHolder {
+        private ListItemSoundBinding mBinding;
+
+        private SoundHolder(ListItemSoundBinding binding) {
+            super(binding.getRoot());
+            mBinding = binding;
+            mBinding.setViewModel(new SoundViewModel(mBeatBox));
+        }
+
+        public void bind(Sound sound) {
+            mBinding.getViewModel().setSound(sound);
+            mBinding.executePendingBindings();
+        }
+    }
+
+    private class SoundAdapter extends RecyclerView.Adapter<SoundHolder> {
+        private List<Sound> mSounds;
+
+        public SoundAdapter(List<Sound> sounds) {
+            mSounds = sounds;
+        }
+
+        @Override
+        public SoundHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+            LayoutInflater inflater = LayoutInflater.from(getActivity());
+            ListItemSoundBinding binding = DataBindingUtil
+                    .inflate(inflater, R.layout.list_item_sound, parent, false);
+            return new SoundHolder(binding);
+        }
+
+        @Override
+        public void onBindViewHolder(SoundHolder holder, int position) {
+            Sound sound = mSounds.get(position);
+            holder.bind(sound);
+        }
+
+        @Override
+        public int getItemCount() {
+            return mSounds.size();
+        }
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/main/java/com/bignerdranch/android/beatbox/SingleFragmentActivity.java

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+package com.bignerdranch.android.beatbox;
+
+
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v7.app.AppCompatActivity;
+
+public abstract class SingleFragmentActivity extends AppCompatActivity {
+    protected abstract Fragment createFragment();
+
+    protected int getLayoutResId() {
+        return R.layout.activity_fragment;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(getLayoutResId());
+        FragmentManager manager = getSupportFragmentManager();
+        Fragment fragment = manager.findFragmentById(R.id.fragment_container);
+
+        if (fragment == null) {
+            fragment = createFragment();
+            manager.beginTransaction()
+                .add(R.id.fragment_container, fragment)
+                .commit();
+        }
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/main/java/com/bignerdranch/android/beatbox/Sound.java

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+package com.bignerdranch.android.beatbox;
+
+public class Sound {
+    private String mAssetPath;
+    private String mName;
+    private Integer mSoundId;
+
+    public Sound(String assetPath) {
+        mAssetPath = assetPath;
+        String[] components = assetPath.split("/");
+        String filename = components[components.length - 1];
+        mName = filename.replace(".wav", "");
+    }
+
+    public String getAssetPath() {
+        return mAssetPath;
+    }
+
+    public String getName() {
+        return mName;
+    }
+
+    public Integer getSoundId() {
+        return mSoundId;
+    }
+
+    public void setSoundId(Integer soundId) {
+        mSoundId = soundId;
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/main/java/com/bignerdranch/android/beatbox/SoundViewModel.java

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+package com.bignerdranch.android.beatbox;
+
+import android.databinding.BaseObservable;
+import android.databinding.Bindable;
+import android.util.Log;
+
+public class SoundViewModel extends BaseObservable {
+    private Sound mSound;
+    private BeatBox mBeatBox;
+
+    public SoundViewModel(BeatBox beatBox) {
+        mBeatBox = beatBox;
+    }
+
+    @Bindable
+    public String getTitle() {
+        return mSound.getName();
+    }
+
+    public Sound getSound() {
+        return mSound;
+    }
+
+    public void setSound(Sound sound) {
+        mSound = sound;
+        notifyChange();
+    }
+
+    public void onButtonClicked() {
+        mBeatBox.play(mSound);
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/main/res/layout/activity_fragment.xml

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+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/fragment_container"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"/>

Book Files/21_UnitTesting/BeatBox/app/src/main/res/layout/fragment_beat_box.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<layout
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+</layout>

Book Files/21_UnitTesting/BeatBox/app/src/main/res/layout/list_item_sound.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools">
+    <data>
+        <variable
+            name="viewModel"
+            type="com.bignerdranch.android.beatbox.SoundViewModel"/>
+    </data>
+    <Button
+        android:layout_width="match_parent"
+        android:layout_height="120dp"
+        android:onClick="@{() -> viewModel.onButtonClicked()}"
+        android:text="@{viewModel.title}"
+        tools:text="Sound name"/>
+</layout>

Book Files/21_UnitTesting/BeatBox/app/src/main/res/values-w820dp/dimens.xml

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+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

Book Files/21_UnitTesting/BeatBox/app/src/main/res/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

Book Files/21_UnitTesting/BeatBox/app/src/main/res/values/dimens.xml

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+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>

Book Files/21_UnitTesting/BeatBox/app/src/main/res/values/strings.xml

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+<resources>
+    <string name="app_name">BeatBox</string>
+</resources>

Book Files/21_UnitTesting/BeatBox/app/src/main/res/values/styles.xml

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+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>

Book Files/21_UnitTesting/BeatBox/app/src/test/java/com/bignerdranch/android/beatbox/ExampleUnitTest.java

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+package com.bignerdranch.android.beatbox;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}

Book Files/21_UnitTesting/BeatBox/app/src/test/java/com/bignerdranch/android/beatbox/SoundViewModelTest.java

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+package com.bignerdranch.android.beatbox;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.hamcrest.core.Is.is;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+public class SoundViewModelTest {
+    private BeatBox mBeatBox;
+    private Sound mSound;
+    private SoundViewModel mSubject;
+
+    @Before
+    public void setUp() throws Exception {
+        mBeatBox = mock(BeatBox.class);
+        mSound = new Sound("assetPath");
+        mSubject = new SoundViewModel(mBeatBox);
+        mSubject.setSound(mSound);
+    }
+
+    @Test
+    public void exposesSoundNameAsTitle() {
+        assertThat(mSubject.getTitle(), is(mSound.getName()));
+    }
+
+    @Test
+    public void callsBeatBoxPlayOnButtonClicked() {
+        mSubject.onButtonClicked();
+        verify(mBeatBox).play(mSound);
+    }
+}