MyArrayList isEmpty()

src/main/java/MyArrayList.java

@@ -1,21 +1,82 @@
-import java.lang.reflect.Array;
-
 public class MyArrayList<T> {
-    private final int INITIAL_SIZE = 10;
+    private final static int INITIAL_SIZE = 0;
     private Object[] myArrayList;
     private int size;
 
-    // create array of Object[3]
-
     public MyArrayList() {
-        this.myArrayList = new Object[INITIAL_SIZE];
-        size = INITIAL_SIZE;
+        this(INITIAL_SIZE);
+        this.size = myArrayList.length;
+    }
+
+    public MyArrayList(int size) {
+        this.myArrayList = new Object[size];
+        this.size = size;
+    }
+
+
+    public void add(T data) {
+
+            Object[] tempArray = new Object[getSize() + 1];
+            tempArray[size] = data;
+            this.myArrayList = tempArray;
+            setSizeBy1();
+
+    }
+
+    public int getSize() {
+        return this.size;
+    }
+
+    public void setSizeBy1() {
+        this.size++;
+    }
+
+    public void resetSize() {
+        this.size = INITIAL_SIZE;
     }
 
-    public MyArrayList(T[] myArrayList) {
-        this.myArrayList = myArrayList;
-        size = myArrayList.length;
+    public void decreaseSize() {
+        this.size--;
     }
 
-    
+    public T get(int i) {
+        return (T) this.myArrayList[i];
+    }
+
+    public void remove(T data) {
+        // removes first instance of that data
+
+        Object[] smallerArray = new Object[this.myArrayList.length - 1];
+        int counter = 0;
+        for (int i = 0; i < myArrayList.length; i++) {
+            System.out.println(myArrayList[i]);
+            if (!myArrayList[i].equals(data)) {
+                smallerArray[counter++] = myArrayList[i];
+            }
+        }
+
+        this.myArrayList = smallerArray;
+        decreaseSize();
+    }
+
+
+    public void set(int i, T data) {
+        try {
+            this.myArrayList[i] = data;
+        } catch (ArrayIndexOutOfBoundsException e) {
+            System.out.println("That index is not in my array list!");
+        }
+    }
+
+
+    public void clear() {
+        Object[] tempArr = new Object[INITIAL_SIZE];
+        resetSize();
+
+        myArrayList = tempArr;
+    }
+
+    public boolean isEmpty() {
+        return (getSize() == 0);
+    }
 }

src/test/java/MyArrayListTest.java

@@ -1,15 +1,71 @@
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
 public class MyArrayListTest {
-    MyArrayList arrayList;
+    MyArrayList<String> stringList;
     @Before
     public void setUp() {
-    arrayList = new MyArrayList();
+
+        stringList = new MyArrayList<>();
+        stringList.add("Wilhelm spilled the tea");
     }
 
     @Test
     public void testAdd() {
 
+        int expectedSize = 1;
+
+        Assert.assertEquals(expectedSize, stringList.getSize());
+    }
+
+    @Test
+    public void testGet() {
+        String expectedString = "Wilhelm spilled the tea";
+        Assert.assertTrue(expectedString.equals(stringList.get(stringList.getSize()-1)));
+
+    }
+
+    @Test
+    public void testRemove() {
+        int expectedSize = 0;
+        stringList.remove("Wilhelm spilled the tea");
+        Assert.assertEquals(expectedSize, stringList.getSize());
+    }
+
+    @Test
+    public void testSet() {
+        String expectedString = "they moved the table";
+
+        stringList.add("Wilhelm spilled the tea");
+        stringList.add("Wilhelm spilled the tea");
+        stringList.add("the table got wet :(");
+        stringList.add("Nhu got more tears to fill up her tea");
+        stringList.add("Wilhelm spilled the tea");
+        stringList.add("Wilhelm spilled the tea");
+
+        stringList.set(5, "they moved the table");
+
+        Assert.assertEquals(expectedString, stringList.get(5));
+    }
+
+    @Test
+    public void testClear() {
+        int expectedSize = 0;
+        stringList.add("Wilhelm spilled the tea");
+        stringList.add("Wilhelm spilled the tea");
+        stringList.add("the table got wet :(");
+        stringList.add("Nhu got more tears to fill up her tea");
+        stringList.add("Wilhelm spilled the tea");
+        stringList.add("Wilhelm spilled the tea");
+
+        stringList.clear();
+        Assert.assertEquals(expectedSize, stringList.getSize());
+
+    }
+
+    @Test
+    public void testIsEmpty() {
+        Assert.assertFalse(stringList.isEmpty());
     }
 }