Godfrey Nolan
Founder RIIS LLC
http://github.com/godfreynolan/AnDevConSF
https://slides.com/godfreynolan/android-tdd
public double add(double firstOperand, double secondOperand) {
return firstOperand + secondOperand;
}
@Test
public void calculator_CorrectAdd_ReturnsTrue() {
assertEquals(7, add(3,4);
}
@Test
public void calculator_CorrectAdd_ReturnsTrue() {
assertEquals("Addition is broken", 7, add(3,4);
}
dependencies {
// Unit testing dependencies.
testCompile 'junit:junit:4.12'
}
C:\Users\godfrey\AndroidStudioProjects\BasicSample>gradlew test --continue
Downloading https://services.gradle.org/distributions/gradle-2.2.1-all.zip
................................................................................
..................................................
Unzipping C:\Users\godfrey\.gradle\wrapper\dists\gradle-2.2.1-all\6dibv5rcnnqlfbq9klf8imrndn\gradle-2.2.1-all.zip to C:\Users\godfrey\.gradle\wrapper\dists\gradle-2.2.1-all\6dibv5rcnnqlfbq9klf8imrndn
Download https://jcenter.bintray.com/com/google/guava/guava/17.0/guava-17.0.jar
Download https://jcenter.bintray.com/com/android/tools/lint/lint-api/24.2.3/lint-api-24.2.3.jar
Download https://jcenter.bintray.com/org/ow2/asm/asm-analysis/5.0.3/asm-analysis-5.0.3.jar
Download https://jcenter.bintray.com/com/android/tools/external/lombok/lombok-ast/0.2.3/lombok-ast-0.2.3.jar
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:prepareDebugDependencies
:app:compileDebugAidl
:app:compileDebugRenderscript
.
.
.
:app:compileReleaseUnitTestSources
:app:assembleReleaseUnitTest
:app:testRelease
:app:test
BUILD SUCCESSFUL
Total time: 3 mins 57.013 secs
public class CalculatorTest {
private Calculator mCalculator;
@Before
public void setUp() {
mCalculator = new Calculator();
}
@Test
public void calculator_CorrectAdd_ReturnsTrue() {
double resultAdd = mCalculator.add(3, 4);
assertEquals(7, resultAdd,0);
}
@After
public void tearDown() {
mCalculator = null;
}
}
@RunWith(Parameterized.class)
public class CalculatorParamTest {
private int mOperandOne, mOperandTwo, mExpectedResult;
private Calculator mCalculator;
@Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][] {
{3, 4, 7}, {4, 3, 7}, {8, 2, 10}, {-1, 4, 3}, {3256, 4, 3260}
});
}
public CalculatorParamTest(int mOperandOne, int mOperandTwo, int mExpectedResult) {
this.mOperandOne = mOperandOne;
this.mOperandTwo = mOperandTwo;
this.mExpectedResult = mExpectedResult;
}
@Before
public void setUp() { mCalculator = new Calculator(); }
@Test
public void testAdd_TwoNumbers() {
int resultAdd = mCalculator.add(mOperandOne, mOperandTwo);
assertEquals(mExpectedResult, resultAdd, 0);
}
}
@Test
public void test() throws Exception {
// Arrange, prepare behavior
Helper aMock = mock(Helper.class);
when(aMock.isCalled()).thenReturn(true);
// Act
testee.doSomething(aMock);
// Assert - verify interactions
verify(aMock).isCalled();
}
when(methodIsCalled).thenReturn(aValue);
dependencies {
// Unit testing dependencies.
testCompile 'junit:junit:4.12'
testCompile 'org.hamcrest:hamcrest-library:1.3'
}
@Test
public void calculator_CorrectHamAdd_ReturnsTrue() {
assertThat(both(greaterThan(6)).and(lessThan(8)), mCalculator.add(3, 4));
}
dependencies {
// Unit testing dependencies.
testCompile 'junit:junit:4.12'
testCompile "org.robolectric:robolectric:3.0"
}
@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = 21, manifest = "src/main/AndroidManifest.xml")
public class RobolectricUnitTest {
@Test
public void shouldHaveHappySmiles() throws Exception {
String hello = new MainActivity().getResources().getString(R.string.hello_world);
assertThat(hello, equalTo("Hello world!"));
}
}
dependencies {
// Unit testing dependencies.
testCompile 'junit:junit:4.12'
testCompile 'org.mockito:mockito-core:1.10.19'
}
@SmallTest
public class DatabaseTest {
private User joeSmith = new User("Joe", "Smith");
private final int USER_ID = 1;
@Test
public void testMockUser() {
//mock SQLHelper
SQLHelper dbHelper = Mockito.mock(SQLHelper.class);
//have mockito return joeSmith when calling dbHelper getUser
Mockito.when(dbHelper.getUser(USER_ID)).thenReturn(joeSmith);
//Assert joeSmith is returned by getUser
Assert.assertEquals(dbHelper.getUser(USER_ID), joeSmith);
}
}
@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = 21, manifest = "src/main/AndroidManifest.xml")
public class ZodiacUnitTest {
private ListView listView;
private String[] zodiacSigns;
@Before
public void setUp() {
MainActivity mainActivity = Robolectric.buildActivity(MainActivity.class).create().get();
assertNotNull("Main Activity not setup", mainActivity);
listView=(ListView) mainActivity.findViewById(R.id.list_of_signs);
zodiacSigns = RuntimeEnvironment.application.getResources().getStringArray(R.array.zodiac_array);
}
@Test
public void listLoaded() throws Exception {
assertThat("should be a dozen star signs", zodiacSigns.length, equalTo(listView.getCount()));
}
}
sdk.dir=/home/godfrey/android/sdk
@Test
public void test() throws Exception {
// Arrange, prepare behavior
Helper aMock = mock(Helper.class);
when(aMock.isCalled()).thenReturn(true);
// Act
testee.doSomething(aMock);
// Assert - verify interactions
verify(aMock).isCalled();
}
when(methodIsCalled).thenReturn(aValue);
@RunWith(MockitoJUnitRunner.class)
public class UserPreferencesTest {
// Use Mockito to initialize UserPreferences
public UserPreferences tUserPreferences = Mockito.mock(UserPreferences.class);
private Activity tActivity;
@Before
public void setUp() {
// Use Mockito to declare the return value of getSharedPreferences()
Mockito.when(tUserPreferences.getSharedPreferences(tActivity)).thenReturn("true");
}
@Test
public void sharedPreferencesTest_ReturnsTrue() {
// Test
Assert.assertThat(tUserPreferences.getSharedPreferences(tActivity), is("true"));
}
}
@RunWith(MockitoJUnitRunner.class)
public class DatabaseTest {
private User joeSmith = new User("Joe", "Smith");
private final int USER_ID = 1;
@Test
public void testMockUser() {
//mock SQLHelper
SQLHelper dbHelper = Mockito.mock(SQLHelper.class);
//have mockito return joeSmith when calling dbHelper getUser
Mockito.when(dbHelper.getUser(USER_ID)).thenReturn(joeSmith);
//Assert joeSmith is returned by getUser
Assert.assertEquals(dbHelper.getUser(USER_ID), joeSmith);
}
}
@RunWith(MockitoJUnitRunner.class)
public class AudioHelperTest {
private final int MAX_VOLUME = 100;
@Test
public void maximizeVolume_Maximizes_Volume() {
// Create an AudioManager object using Mockito
AudioManager audioManager = Mockito.mock(AudioManager.class);
// Inform Mockito what to return when audioManager.getStreamMaxVolume is called
Mockito.when(audioManager.getStreamMaxVolume(AudioManager.STREAM_RING)).thenReturn(MAX_VOLUME);
new AudioHelper().maximizeVolume(audioManager);
// verify with Mockito that setStreamVolume to 100 was called.
Mockito.verify(audioManager).setStreamVolume(AudioManager.STREAM_RING, MAX_VOLUME, 0);
}
}
@RunWith(MockitoJUnitRunner.class)
public class DownloadUrlTest {
public DownloadUrl tDownloadUrl = Mockito.mock(DownloadUrl.class);
public String htmlString = "<!doctype html><html itemscope=\"\" itemtype=\"http://schema.org/WebPage\" lang=\"en\"><head>";
@Before
public void setUp() {
try {
Mockito.when(tDownloadUrl.loadFromNetwork("http://www.google.com")).thenReturn(htmlString);
} catch (IOException e) {
// network error
}
}
@Test
public void downloadUrlTest_ReturnsTrue() {
try {
assertThat(tDownloadUrl.loadFromNetwork("http://www.google.com"),containsString("doctype"));
} catch (IOException e) {
//
}
}
}
You can't TDD w/o unit testing
TDD means writing the tests before the code
TDD is more painless than classic unit testing
You can unit test w/o TDD
Unit tests don't mandate when you write the tests
Unit tests are often written at the end of a coding cycle
@Before
public void setUp() {
MainActivity mainActivity = Robolectric.buildActivity(MainActivity.class).create().get();
assertNotNull("Main Activity not setup", mainActivity);
listView=(ListView) mainActivity.findViewById(R.id.list_of_signs);
zodiacSigns = RuntimeEnvironment.application.getResources().getStringArray(R.array.zodiac_array);
}
@Test
public void listLoaded() throws Exception {
assertThat("should be a dozen star signs", zodiacSigns.length, equalTo(numSigns));
}
@Test
public void listContentCheck() {
ListAdapter listViewAdapter = listView.getAdapter();
assertEquals(zodiacSigns[0], listViewAdapter.getItem(0));
assertEquals(zodiacSigns[1], listViewAdapter.getItem(1));
assertEquals(zodiacSigns[2], listViewAdapter.getItem(2));
assertEquals(zodiacSigns[3], listViewAdapter.getItem(3));
assertEquals(zodiacSigns[4], listViewAdapter.getItem(4));
assertEquals(zodiacSigns[5], listViewAdapter.getItem(5));
assertEquals(zodiacSigns[6], listViewAdapter.getItem(6));
assertEquals(zodiacSigns[7], listViewAdapter.getItem(7));
assertEquals(zodiacSigns[8], listViewAdapter.getItem(8));
assertEquals(zodiacSigns[9], listViewAdapter.getItem(9));
assertEquals(zodiacSigns[10], listViewAdapter.getItem(10));
assertEquals(zodiacSigns[11], listViewAdapter.getItem(11));
}
<resources>
<string name="app_name">Horoscope</string>
<string-array name="zodiac_array">
<item>Aries</item>
<item>Taurus</item>
<item>Gemini</item>
<item>Cancer</item>
<item>Leo</item>
<item>Virgo</item>
<item>Libra</item>
<item>Scorpio</item>
<item>Sagittarius</item>
<item>Capricorn</item>
<item>Aquarius</item>
<item>Pisces</item>
</string-array>
</resources>
public static final Zodiac[] signs = {
new Zodiac("Aries","Enterprising, Incisive, Spontaneous, Daring, Active, Courageous and Energetic, the Aries are the proverbial infants, guileless and optimistic to the fault.", "Ram", "April"),
new Zodiac("Taurus","Known for being reliable, practical, ambitious and sensual, the people born under the Zodiac Sign Taurus have an eye for beauty.", "Bull", "May"),
new Zodiac("Gemini","Gemini-born are clever and intellectual people but they can also be tense and restless.", "Twins", "June"),
new Zodiac("Cancer"," The otherwise tenacious, loyal, sympathetic and strong Crabs are vulnerable in many ways.", "Crab", "July"),
new Zodiac("Leo","Warm, action-oriented and driven by the desire to be loved and admired, the Leo have an air royalty about them.", "Lion", "August"),
new Zodiac("Virgo","Methodical, meticulous, analytical and mentally astute, the Virgo natives are perfectionists to the core, or at least, they like to believe that they are.", "Virgin", "September"),
new Zodiac("Libra","Librans are famous for maintaining balance and harmony.", "Scales", "October"),
new Zodiac("Scorpio","The Scorpio-born are strong willed and mysterious, and they know how to effortlessly grab the limelight, as they possess what it takes to achieve their goals.", "Scorpion", "November"),
new Zodiac("Sagittarius","Sagittarians are born adventurers. They tend to get bored with things easily and move on with life", "Archer", "December"),
new Zodiac("Capricorn","The Capricorn-born people are the most determined of the entire Zodiac.", "Goat", "January"),
new Zodiac("Aquarius","The Aquarius-born people are humanitarians to the core", "Water Bearer", "February"),
new Zodiac("Pisces","Pisces or the Fish is considered as the proverbial dreamers of the Zodiac.", "Fish", "March")
};
public class ZodiacDetailActivity extends Activity {
public static final String EXTRA_SIGN = "ZodiacSign";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zodiac_detail);
int signNum = (Integer)getIntent().getExtras().get(EXTRA_SIGN);
Zodiac zodiac = Zodiac.signs[signNum];
TextView name = (TextView)findViewById(R.id.name);
name.setText(zodiac.getName());
TextView description = (TextView)findViewById(R.id.description);
description.setText(zodiac.getDescription());
TextView symbol = (TextView)findViewById(R.id.symbol);
symbol.setText(zodiac.getSymbol());
TextView month = (TextView)findViewById(R.id.month);
month.setText(zodiac.getMonth());
}
}
@Before
public void setUp() {
Intent intent = new Intent(RuntimeEnvironment.application, ZodiacDetailActivity.class);
intent.putExtra(ZodiacDetailActivity.EXTRA_SIGN, ARIES_SIGN_INDEX);
zodiacDetailActivity = Robolectric.buildActivity(ZodiacDetailActivity.class).withIntent(intent).create().get();
assertNotNull("Zodiac Detail Activity not setup", zodiacDetailActivity);
}
@Test
public void zodiacSymbolTest() throws Exception {
TextView symbolTextView = (TextView) zodiacDetailActivity.findViewById(R.id.symbol);
assertEquals(Zodiac.signs[ARIES_SIGN_INDEX].getSymbol(), symbolTextView.getText().toString());
}
public class AsyncTaskParseJson extends AsyncTask<String, String, String> {
String yourJsonStringUrl = "http://a.knrz.co/horoscope-api/current/";
String horoscope = "";
public AsyncTaskParseJson(Zodiac sign) {
yourJsonStringUrl += sign.getName().toLowerCase();
}
@Override
protected void onPreExecute() {}
@Override
protected String doInBackground(String... arg0) {
try {
// instantiate our json parser
JsonParser jParser = new JsonParser();
// get json string from url
JSONObject json = jParser.getJSONFromUrl(yourJsonStringUrl);
horoscope = json.getString("prediction");
horoscope = URLDecoder.decode(horoscope);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String strFromDoInBg) {
TextView display = (TextView) findViewById(R.id.daily);
display.setText(horoscope);
}
}
@Test
public void zodiacDailyTest() {
TextView dailyTextView = (TextView) zodiacDetailActivity.findViewById(R.id.daily);
assertEquals("You’ll continue playing dress-up this week, despite being almost 30, " +
"and feeling kind of silly every time you put on that professional-looking suit.", +
dailyTextView.getText().toString());
}
@RunWith(AndroidJUnit4.class)
@LargeTest
public class MainActivityTest {
@Rule
public ActivityTestRule<MainActivity> activityTestRule
= new ActivityTestRule<> (MainActivity.class);
@Test
public void helloWorldTest() {
onView(withId(R.id.hello_world))
.check(matches(withText(R.string.hello_world)));
}
}
@Test
public void helloWorldButtonTest(){
onView(withId(R.id.button))
.perform(click())
.check(matches(isEnabled()));
}
@RunWith(AndroidJUnit4.class)
@LargeTest
public class MainActivityTest {
@Rule
public ActivityTestRule<MainActivity> activityTestRule
= new ActivityTestRule<>(MainActivity.class);
@Test
public void toDoListTest(){
onData(anything())
.inAdapterView(withId(R.id.list_of_todos)).atPosition(4)
.perform(click());
onView(withId(R.id.txt_selected_item))
.check(matches(withText("go to the gym")));
}
}
DEMO
package alexandria.israelferrer.com.libraryofalexandria;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewStub;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RatingBar;
import android.widget.TextView;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.squareup.picasso.Picasso;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
public class MainActivity extends Activity {
private static final String PACKAGE = "com.israelferrer.alexandria";
private static final String KEY_FAVS = PACKAGE + ".FAVS";
private List<ArtWork> artWorkList;
private ArtWorkAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView listView = (ListView) findViewById(R.id.listView);
InputStream stream = getResources().openRawResource(R.raw.artwork);
Type listType = new TypeToken<List<ArtWork>>() {
}.getType();
artWorkList = new Gson().fromJson(new InputStreamReader(stream), listType);
final SharedPreferences preferences = getSharedPreferences(getPackageName()
, Context.MODE_PRIVATE);
for (ArtWork artWork : artWorkList) {
artWork.setRating(preferences.getFloat(PACKAGE + artWork.getId(), 0F));
}
adapter = new ArtWorkAdapter();
listView.setAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.filter) {
adapter.orderMode();
return true;
}
return super.onOptionsItemSelected(item);
}
private class ArtWorkAdapter extends BaseAdapter {
private boolean isOrder;
private final List<ArtWork> orderedList;
public ArtWorkAdapter() {
super();
orderedList = new LinkedList<ArtWork>();
}
@Override
public int getCount() {
return artWorkList.size();
}
@Override
public Object getItem(int position) {
return artWorkList.get(position);
}
@Override
public long getItemId(int position) {
return Long.valueOf(artWorkList.get(position).getId());
}
public void orderMode() {
isOrder = !isOrder;
if (isOrder) {
orderedList.clear();
orderedList.addAll(artWorkList);
Collections.sort(orderedList);
notifyDataSetChanged();
} else {
notifyDataSetChanged();
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ArtWork artWork;
if (isOrder) {
artWork = orderedList.get(position);
} else {
artWork = artWorkList.get(position);
}
View row;
switch (artWork.getType()) {
case ArtWork.QUOTE:
row = getLayoutInflater().inflate(R.layout.text_row, null);
TextView quote = (TextView) row.findViewById(R.id.quote);
TextView author = (TextView) row.findViewById(R.id.author);
quote.setText("\"" + artWork.getText() + "\"");
author.setText(artWork.getAuthor());
break;
case ArtWork.PAINTING:
final SharedPreferences preferences = getSharedPreferences(getPackageName()
, Context.MODE_PRIVATE);
final HashSet<String> favs = (HashSet<String>) preferences
.getStringSet(KEY_FAVS,
new HashSet<String>());
row = getLayoutInflater().inflate(R.layout.painting_row, null);
ImageView image = (ImageView) row.findViewById(R.id.painting);
TextView painter = (TextView) row.findViewById(R.id.author);
painter.setText(artWork.getTitle() + " by " + artWork.getAuthor());
Picasso.with(MainActivity.this).load(artWork.getContentUrl()).fit()
.into(image);
RatingBar rating = (RatingBar) row.findViewById(R.id.rate);
rating.setRating(artWork.getRating());
rating.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
preferences.edit().putFloat(PACKAGE + artWork.getId(), rating).apply();
artWork.setRating(rating);
}
});
CheckBox fav = (CheckBox) row.findViewById(R.id.fav);
fav.setChecked(favs.contains(artWork.getId()));
fav.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
final HashSet<String> favs = new HashSet<String>((HashSet<String>)
preferences
.getStringSet(KEY_FAVS,
new HashSet<String>()));
if (isChecked) {
favs.add(artWork.getId());
} else {
favs.remove(artWork.getId());
}
preferences.edit().putStringSet(KEY_FAVS,
favs).apply();
}
});
break;
case ArtWork.MOVIE:
case ArtWork.OPERA:
row = new ViewStub(MainActivity.this);
break;
default:
row = getLayoutInflater().inflate(R.layout.text_row, null);
}
return row;
}
}
}
apply plugin: 'com.android.application'
apply plugin: 'jacoco'
apply plugin: 'sonar-runner'
sonarRunner{
sonarProperties{
property "sonar.host.url", "http://localhost:9000"
property "sonar.jdbc.url", "jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true&useConfigs=maxPerformance"
property "sonar.jdbc.driverClassName","com.mysql.jdbc.Driver"
property "sonar.jdbc.username","root"
property "sonar.jdbc.password","root"
property "sonar.projectKey", "RIIS:CropCompare"
property "sonar.projectVersion", "2.0"
property "sonar.projectName","CropCompare"
property "sonar.java.coveragePlugin", "jacoco"
property "sonar.sources","src\\main"
property "sonar.tests", "src\\test"
property "sonar.jacoco.reportPath", "build\\jacoco\\jacocoTest.exec"
property "sonar.java.binaries", "build"
property "sonar.dynamicAnalysis", "resuseReports"
}
}
http://www.code-labs.io/codelabs/android-testing
https://developer.android.com/training/testing/unit-testing/local-unit-tests.html
http://tools.android.com/tech-docs/unit-testing-support
http://riis.com/blog
https://github.com/rallat/libraryofalexandria
https://github.com/godfreynolan/andevconsf
godfrey@riis.com
@godfreynolan
http://slides.com/godfreynolan