tried to clone

src/main/java/MyArrayList.java

+import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.Arrays;
 
             if (myArrayList[i].equals(data))
                 return true;
         }
-
         return false;
     }
+
+
+    public int indexOf(T findMe) {
+        int count = -1;
+        for (Object o: myArrayList) {
+            count++;
+            if (o.equals(findMe)) {
+                return count;
+            }
+        }
+        return count;
+    }
+
 }

src/test/java/MyArrayListTest.java

         String expectedString = "they moved the table";
         Assert.assertFalse(stringList.contains(expectedString));
     }
+
+    @Test
+    public void testIndexOf() {
+        String findMe = "Nhu got more tears to fill up her 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");
+
+        int expectedIndex = 3;
+
+        Assert.assertEquals(expectedIndex, stringList.indexOf(findMe));
+    }
 }