Added unit tests and refactored code for testability

app/src/main/java/com/wbrawner/numberguess/GameFragment.java

@@ -97,7 +97,7 @@ public class GameFragment extends Fragment  {
                     );
                 }
                 setResponse(
-                        ng.checkAnswer(user)
+                        ng.checkAnswer(user.getLastGuess())
                 );
                 guessInput.setText(null);
             }
@@ -137,7 +137,7 @@ public class GameFragment extends Fragment  {
         int duration = Toast.LENGTH_SHORT;
         Toast toast = Toast.makeText(context, null, duration);
         if (response.get("code").equals("correct")) {
-            String popup = getActivity().getString(R.string.correct_answer, response.get("count"));
+            String popup = getActivity().getString(R.string.correct_answer, user.getGuessCount());
             text = getString(R.string.game_over);
             gameOver(popup);
         } else {

app/src/main/java/com/wbrawner/numberguess/NumberGuess.java

@@ -5,22 +5,23 @@ import java.util.Map;
 
 public class NumberGuess {
 
-    protected int answer = 0;
+    private int answer = 0;
 
     public void setAnswer() {
         this.answer = (int) (Math.random() * 100);
     }
 
+    public void setAnswer(int answer) {
+        this.answer = answer;
+    }
+
     public int getAnswer() {
         return this.answer;
     }
 
-    public Map checkAnswer(Player user) {
+    public Map checkAnswer(int guess) {
         Map<String, String> response = new HashMap<>();
-        int guess = user.getLastGuess();
-        String guessCount = String.valueOf(user.getGuesses().size());
         if (guess == this.getAnswer()) {
-            response.put("count", guessCount);
             response.put("code", "correct");
         } else {
             if (guess > this.getAnswer()) {

app/src/main/java/com/wbrawner/numberguess/Player.java

@@ -5,7 +5,16 @@ import java.util.ArrayList;
 
 public class Player {
 
-    protected List<Integer> guesses = new ArrayList<Integer>();
+    public Player() {}
+
+
+    public Player(int[] guesses) {
+        for (int guess : guesses) {
+            this.guesses.add(guess);
+        }
+    }
+
+    private List<Integer> guesses = new ArrayList<Integer>();
 
     public void clearGuesses() {
         this.guesses = new ArrayList<Integer>();
@@ -14,6 +23,10 @@ public class Player {
     public void addGuess(int guess) {
         this.guesses.add(guess);
     }
+
+    public int getGuessCount() {
+        return guesses.size();
+    }
     
     public int getLastGuess() {
         return this.guesses.get(this.guesses.size() - 1);

app/src/main/res/values-es/strings.xml

@@ -5,7 +5,7 @@
     <string name="guess_button">Adivina</string>
     <string name="too_small">¡Ese número es demasiado pequeño!</string>
     <string name="too_big">¡Ese número es demasiado grande!</string>
-    <string name="correct_answer">¡Correcto! Lo adivinaste en %1$s intentos.</string>
+    <string name="correct_answer">¡Correcto! Lo adivinaste en %1$d intentos.</string>
     <string name="no">No</string>
     <string name="yes">Sí</string>
     <string name="ok">OK</string>

app/src/main/res/values/strings.xml

@@ -5,7 +5,7 @@
     <string name="guess_button">Guess</string>
     <string name="too_small">That number is too small!</string>
     <string name="too_big">That number is too big!</string>
-    <string name="correct_answer">Correct! You took %1$s tries to guess the right answer.</string>
+    <string name="correct_answer">Correct! You took %1$d tries to guess the right answer.</string>
     <string name="game_over">You win!</string>
     <string name="yes">Yes</string>
     <string name="no">No</string>

app/src/test/java/com/wbrawner/numberguess/ExampleUnitTest.java

@@ -1,17 +0,0 @@
-package com.wbrawner.numberguess;
-
-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);
-    }
-}

app/src/test/java/com/wbrawner/numberguess/NumberGuessUnitTest.java

@@ -0,0 +1,61 @@
+package com.wbrawner.numberguess;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.util.Map;
+
+import static junit.framework.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Created by billy on 7/28/2017.
+ */
+
+public class NumberGuessUnitTest {
+    private static NumberGuess ng;
+
+    @BeforeClass
+    public static void setUp() throws Exception {
+        ng = new NumberGuess();
+        ng.setAnswer();
+    }
+
+    @Test
+    public void setAnswer() throws Exception {
+        boolean result = 0 < ng.getAnswer() && ng.getAnswer() < 101;
+        assertTrue("Generated number is larger than 0 and less than 101", result);
+    }
+
+    @Test
+    public void setAnswer1() throws Exception {
+        int previous = ng.getAnswer();
+        ng.setAnswer(74);
+        assertNotEquals("setAnswer with parameter", previous, ng.getAnswer());
+        ng.setAnswer(previous);
+    }
+
+    @Test
+    public void getAnswer() throws Exception {
+        int previous = ng.getAnswer();
+        ng.setAnswer(23);
+        assertEquals("getAnswer", 23, ng.getAnswer());
+        ng.setAnswer(previous);
+    }
+
+    @Test
+    public void checkAnswer() throws Exception {
+        Map tooBig = ng.checkAnswer(ng.getAnswer() + 1);
+        assertTrue("'Too big' response map contains code key", tooBig.containsKey("code"));
+        assertEquals("'Too big' response code equal 'too_big'", "too_big", tooBig.get("code"));
+
+        Map tooSmall = ng.checkAnswer(ng.getAnswer() - 1);
+        assertTrue("'Too small' response map contains code key", tooSmall.containsKey("code"));
+        assertEquals("'Too small' response code equals 'too_small'", "too_small", tooSmall.get("code"));
+
+        Map correct = ng.checkAnswer(ng.getAnswer());
+        assertTrue("'Correct' response map contains code key", correct.containsKey("code"));
+        assertEquals("'Correct' response code equal 'correct'", "correct", correct.get("code"));
+    }
+}

app/src/test/java/com/wbrawner/numberguess/PlayerTest.java

@@ -0,0 +1,64 @@
+package com.wbrawner.numberguess;
+
+import android.support.annotation.NonNull;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+import java.util.ListIterator;
+
+import static org.junit.Assert.*;
+
+/**
+ * Created by billy on 7/28/2017.
+ */
+public class PlayerTest {
+    private Player player;
+
+    @Before
+    public void setUp() {
+        player = new Player(new int[] {25, 50, 75});
+    }
+
+    @Test
+    public void player() {
+        Player newPlayer = new Player();
+        assertEquals("New player has no guesses", 0, newPlayer.getGuessCount());
+    }
+
+    @Test
+    public void clearGuesses() throws Exception {
+        player.clearGuesses();
+        assertEquals("clearGuesses", 0, player.getGuessCount());
+    }
+
+    @Test
+    public void addGuess() throws Exception {
+        player.addGuess(90);
+        assertEquals("Added guess 90 - should be last guess", 90, player.getLastGuess());
+        assertEquals("Added guess 90 - guess count should be 4", 4, player.getGuessCount());
+    }
+
+    @Test
+    public void getGuessCount() throws Exception {
+        assertEquals("Guess count equals 3", 3, player.getGuessCount());
+    }
+
+    @Test
+    public void getLastGuess() throws Exception {
+        assertEquals("Last guess is 75", 75, player.getLastGuess());
+    }
+
+    @Test
+    public void getGuesses() throws Exception {
+        List<Integer> startingGuesses =
+                Arrays.asList(25, 50, 75);
+        assertEquals("getGuesses", startingGuesses, player.getGuesses());
+    }
+
+}