Done

app/src/main/java/com/example/week9fm5cc5/MainActivity.java

@@ -3,12 +3,52 @@
 import androidx.appcompat.app.AppCompatActivity;
 
 import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+
+import com.example.week9fm5cc5.helpers.GenerateAscii;
+import com.example.week9fm5cc5.helpers.ReplaceCharacters;
 
 public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+
+        final Button buttonGenerateAscii = (Button) findViewById(R.id.generateAscii);
+        final Button buttonReplaceCharacters = (Button) findViewById(R.id.replaceCharacters);
+        final EditText inputBox = (EditText) findViewById(R.id.inputBox);
+        final TextView resultText = (TextView) findViewById(R.id.resultText);
+
+        /*
+         |-------------------------------
+         | Calculate sum of Ascii
+         |-------------------------------
+        */
+        buttonGenerateAscii.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                GenerateAscii generateAscii = new GenerateAscii();
+                String result = String.valueOf((int) generateAscii.sum(inputBox.getText().toString()));
+                resultText.setText("Sum of ASCII = " + result);
+            }
+        });
+
+        /*
+         |-------------------------------
+         | Replace Characters
+         |-------------------------------
+        */
+        buttonReplaceCharacters.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ReplaceCharacters replaceCharacters = new ReplaceCharacters();
+                String result = replaceCharacters.generate(inputBox.getText().toString());
+                resultText.setText("Result = \"" + result + "\"");
+            }
+        });
     }
 }

app/src/main/java/com/example/week9fm5cc5/helpers/GenerateAscii.java

@@ -0,0 +1,23 @@
+package com.example.week9fm5cc5.helpers;
+
+import java.util.*;
+import java.lang.*;
+
+public class GenerateAscii {
+
+    /*
+     |-------------------------------
+     | Sum
+     |-------------------------------
+    */
+    public int sum(String string) {
+        int sum = 0;
+
+        for (int i=0; i < string.length(); i++) {
+            int asciiValue = string.charAt(i);
+            sum += asciiValue;
+        }
+
+        return sum;
+    }
+}

app/src/main/java/com/example/week9fm5cc5/helpers/ReplaceCharacters.java

@@ -0,0 +1,28 @@
+package com.example.week9fm5cc5.helpers;
+
+import java.util.*;
+import java.lang.*;
+
+public class ReplaceCharacters {
+
+    /*
+     |-------------------------------
+     | Generate
+     | FM5CC5
+     | f => m , F => M
+     | 5 => c, 5 => C, (no logic)
+     | c => c, C => C, (no logic)
+     | c => 5, C => 5
+     |-------------------------------
+    */
+    public String generate(String string) {
+
+        String updatedString = string
+                .replace("f", "m")
+                .replace("F", "M")
+                .replace("c", "5")
+                .replace("C", "5");
+
+        return updatedString;
+    }
+}

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

@@ -1,5 +1,5 @@
 <resources>
-    <string name="app_name">Week9 (FM5CC5)</string>
+    <string name="app_name">Week9 (FM5CC5) - Application</string>
     <string name="generateAsciiSum">Calculate Ascii</string>
     <string name="replaceCharacters">Replace Characters</string>
     <string name="input"></string>

app/src/test/java/com/example/week9fm5cc5/helpers/GenerateAsciiTest.java

@@ -0,0 +1,71 @@
+package com.example.week9fm5cc5.helpers;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class GenerateAsciiTest {
+    GenerateAscii generateAscii;
+
+    @Before
+    public void setup() {
+        generateAscii = new GenerateAscii();
+    }
+
+    @Test
+    public void testEmptyAndSpace() {
+        assertEquals(0, generateAscii.sum(""));
+        assertEquals(32, generateAscii.sum(" "));
+        assertEquals(64, generateAscii.sum("  "));
+    }
+
+    @Test
+    public void testRandomAlphabet() {
+        assertEquals(104, generateAscii.sum("h"));
+        assertEquals(101, generateAscii.sum("e"));
+        assertEquals(108, generateAscii.sum("l"));
+        assertEquals(119, generateAscii.sum("w"));
+        assertEquals(111, generateAscii.sum("o"));
+        assertEquals(114, generateAscii.sum("r"));
+        assertEquals(100, generateAscii.sum("d"));
+    }
+
+    @Test
+    public void testString() {
+        assertEquals(104+101+108+119+111+114+100, generateAscii.sum("helword"));
+    }
+
+    @Test
+    public void testCustomAlphabet() {
+        // Azerbaijani (🇦🇿)
+        assertEquals(231, generateAscii.sum("ç"));
+        assertEquals(246, generateAscii.sum("ö"));
+        assertEquals(601, generateAscii.sum("ə"));
+        assertEquals(287, generateAscii.sum("ğ"));
+        assertEquals(351, generateAscii.sum("ş"));
+        assertEquals(305, generateAscii.sum("ı"));
+        assertEquals(252, generateAscii.sum("ü"));
+    }
+
+    @Test
+    public void testNumbers() {
+        assertEquals(49, generateAscii.sum("1"));
+        assertEquals(50, generateAscii.sum("2"));
+        assertEquals(51, generateAscii.sum("3"));
+        assertEquals(52, generateAscii.sum("4"));
+        assertEquals(53, generateAscii.sum("5"));
+        assertEquals(54, generateAscii.sum("6"));
+        assertEquals(55, generateAscii.sum("7"));
+    }
+
+    @Test
+    public void testNonAlpha() {
+        assertEquals(45, generateAscii.sum("-"));
+        assertEquals(46, generateAscii.sum("."));
+        assertEquals(41, generateAscii.sum(")"));
+        assertEquals(40, generateAscii.sum("("));
+        assertEquals(61, generateAscii.sum("="));
+        assertEquals(43, generateAscii.sum("+"));
+    }
+}

app/src/test/java/com/example/week9fm5cc5/helpers/ReplaceCharactersTest.java

@@ -0,0 +1,53 @@
+package com.example.week9fm5cc5.helpers;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class ReplaceCharactersTest {
+    ReplaceCharacters replaceCharacters;
+
+    @Before
+    public void setup() {
+        replaceCharacters = new ReplaceCharacters();
+    }
+
+    @Test
+    public void testNull() {
+        assertEquals("", replaceCharacters.generate(""));
+        assertEquals(" ", replaceCharacters.generate(" "));
+    }
+
+    @Test
+    public void testNoChanges() {
+        assertEquals("ABDE", replaceCharacters.generate("ABDE"));
+        assertEquals("abde", replaceCharacters.generate("abde"));
+        assertEquals("12345", replaceCharacters.generate("12345"));
+        assertEquals("------", replaceCharacters.generate("------"));
+    }
+
+    @Test
+    public void testPositive() {
+        assertEquals("m", replaceCharacters.generate("f"));
+        assertEquals("M", replaceCharacters.generate("F"));
+        assertEquals("5", replaceCharacters.generate("c"));
+        assertEquals("5", replaceCharacters.generate("C"));
+    }
+
+    @Test
+    public void testLongString() {
+        assertEquals("10m01", replaceCharacters.generate("10f01"));
+        assertEquals("000000000MAB", replaceCharacters.generate("000000000FAB"));
+        assertEquals("AAAAAAAAAAAAA5AAAAAAAAAAAA", replaceCharacters.generate("AAAAAAAAAAAAAcAAAAAAAAAAAA"));
+        assertEquals("ssss--5--ssss", replaceCharacters.generate("ssss--C--ssss"));
+    }
+
+    @Test
+    public void testPositiveLong() {
+        assertEquals("mmmm", replaceCharacters.generate("ffff"));
+        assertEquals("MMMM", replaceCharacters.generate("FFFF"));
+        assertEquals("5555", replaceCharacters.generate("cccc"));
+        assertEquals("5555", replaceCharacters.generate("CCCC"));
+    }
+}