Overrode interface and Added Tests for new class

src/DynamicStringList.java

@@ -0,0 +1,63 @@
+public class DynamicStringList implements StringList{
+    String[] strList = new String[1];
+    private int size = 0;
+
+    @Override
+    public String get(int x) {
+        return strList[x];
+    }
+    @Override
+    public void set(int x, String str) {
+        strList[x] = str;
+    }
+
+    @Override
+    public void add(String str) {
+        if (size == strList.length) {
+            String[] newStrList = new String[strList.length*2];
+            for (int i = 0; i < strList.length; i++) {
+                newStrList[i] = strList[i];
+            }
+            strList = newStrList;
+    }
+    strList[size] = str;
+    size++;
+    }
+
+    @Override
+    public String remove(int x) {
+        String removed = strList[x];
+        for (int i = x; i < size - 1; i++) {
+            strList[i] = strList[i+1];
+        }
+
+        strList[size - 1] = null;
+        size--;
+        return removed;
+    }
+
+    @Override
+    public int size() {
+        return size;
+    }
+
+    @Override
+    public int capacity() {
+        return strList.length;
+    }
+}
+//testing stuff without the @test, try to make stuff in maintest
+
+// class Main {
+//     public static void main(String[] args) {
+//         DynamicStringList dsl = new DynamicStringList();
+//         dsl.add("RJ");
+//         System.out.println(dsl.get(0));
+//         dsl.add("RJ");
+//         System.out.println(dsl.get(0));
+//         System.out.println(dsl.size());
+//         for (int i = 0; i < dsl.capacity(); i++) {
+//             System.out.println(dsl.get(i));
+//         }
+//     }
+// }

src/DynamicStringListTest.java

@@ -0,0 +1,93 @@
+import org.junit.jupiter.api.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
+
+
+ public class DynamicStringListTest {
+
+     @Test
+    void testReturnStringAtSpecifiedIndex() {
+         // Arrange
+         DynamicStringList list = new DynamicStringList();
+         list.add("Hello");
+         list.add("World");
+         // Act
+         String result = list.get(1);
+         // Assert
+         assertEquals("World", result);
+     }
+
+     @Test
+     void testReplacingStringAtGivenIndexWithGivenValue() {
+         // Arrange
+        DynamicStringList list = new DynamicStringList();
+         // Act
+         list.add("dog");
+         list.set(0, "Cat");
+         // Assert
+         assertEquals("Cat", list.get(0));
+     }
+
+     @Test
+     void testAddNewStringToEndOfList() {
+         // Arrange
+         DynamicStringList list = new DynamicStringList();
+         // Act
+         list.add("X");
+         list.add("Y");
+         list.add("Z");
+         // Assert
+         assertEquals(3, list.size());
+         assertEquals("X", list.get(0));
+         assertEquals("Y", list.get(1));
+         assertEquals("Z", list.get(2));
+     }
+
+     @Test
+     void testRemoveStringAtGivenIndex() {
+         // Arrange
+         DynamicStringList list = new DynamicStringList();
+         list.add("Person");
+         list.add("Beta");
+         // Act
+         String removed = list.remove(1);
+         // Assert
+         assertEquals("Beta", removed);
+         assertEquals(1, list.size());
+
+     }
+
+     @Test
+     void testCurrentElementsInString   () {
+         // Arrange
+         DynamicStringList list = new DynamicStringList();
+         list.add("me");
+         list.add("him");
+         list.add("her");
+         // Act
+
+         // Assert
+         assertEquals("me", list.get(0));
+         assertEquals("him", list.get(1));
+         assertEquals("her", list.get(2));
+     }
+
+     @Test
+     void testMaxCapacityOfArray() {
+         // Arrange
+         DynamicStringList list = new DynamicStringList();
+         // Act
+         for (int i = 0; i < 10; i++) {
+            list.add("Item" + i);
+         }
+
+         // Assert
+         assertTrue(list.capacity() >=10);
+
+         assertEquals(10, list.size());
+         assertEquals("Item0", list.get(0));
+     }
+
+
+ }