started mySet

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+            <option name="EMULATED" value="true" />
+          </properties>
+          <option name="timeStamp" value="1" />
+        </line-breakpoint>
+      </breakpoints>
+    </breakpoint-manager>
+  </component>
   <component name="editorHistoryManager">
     <entry file="file://$PROJECT_DIR$/generics.iml">
       <provider selected="true" editor-type-id="text-editor" />
     </entry>
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     </entry>
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/README.md">
+      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+        <state split_layout="SPLIT">
+          <first_editor relative-caret-position="400">
+            <caret line="30" column="6" selection-start-line="30" selection-start-column="6" selection-end-line="30" selection-end-column="6" />
+          </first_editor>
+          <second_editor />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/ArrayListTest.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-92">
+          <caret line="156" column="36" lean-forward="true" selection-start-line="156" selection-start-column="36" selection-end-line="156" selection-end-column="36" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
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+      <provider selected="true" editor-type-id="text-editor">
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             <element signature="imports" expanded="true" />
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src/main/java/ArrayList.java

         arr= new Object[0];
     }
 
+    public Object[] getArr() {
+        return arr;
+    }
+
+    public void setArr(Object[] arr) {
+        this.arr = arr;
+    }
+
     public ArrayList(int size) {
         arr=new Object[size];
     }

src/main/java/MySet.java

+import java.util.Arrays;
+
+public class MySet<T> extends ArrayList {
+
+
+
+    public MySet() {
+        setArr(new Object[0]);
+    }
+
+    public MySet(int size) {
+        setArr(new Object[size]);
+    }
+
+
+    @Override
+    public boolean add(Object o){
+        if(!contains(o)){
+            Object[] temp = Arrays.copyOf(getArr(),getArr().length+1);
+            temp[temp.length-1] = o;
+            setArr(temp);
+            return true;}
+            return false;
+    }
+
+}

src/test/java/ArrayListTest.java

 public class ArrayListTest {
 
     ArrayList list = new ArrayList();
+    ArrayList list2 = new ArrayList(5);
+
+    @Test
+    public void sizeTest(){
+        int expected = 5;
+        int actual = list2.size();
+        Assert.assertEquals(expected, actual);
+    }
 
     @Test
     public void addTestInt(){

src/test/java/MySetTest.java

+import org.junit.Assert;
+import org.junit.Test;
+
+public class MySetTest {
+
+    MySet set = new MySet();
+
+    @Test
+    public void addtest(){
+    set.add(3);
+    set.add(4);
+    set.add(3);
+    boolean actual = set.add(3);
+    boolean expected = false;
+    Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void clearTest(){
+        set.add(9);
+        set.add(3);
+        set.add(5);
+        set.add(4);
+        set.clear();
+        int expected=0;
+        int actual = set.size();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void containsTrueTest(){
+        set.add("he");
+        set.add("wh");
+        set.add("si");
+        boolean actual = set.contains("wh");
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void containsFalseTest(){
+        set.add("he");
+        set.add("wh");
+        set.add("si");
+        boolean actual = set.contains("ll");
+        Assert.assertFalse(actual);
+    }
+
+}