diff --git a/company/palantir/ContainsDuplicateTest.java b/company/palantir/ContainsDuplicateTest.java
new file mode 100644
index 00000000..e74f53c9
--- /dev/null
+++ b/company/palantir/ContainsDuplicateTest.java
@@ -0,0 +1,26 @@
+import static org.junit.Assert.assertEquals;
+import org.junit.Test;
+
+
+//Given an array of integers, find if the array contains any duplicates. Your function should return 
+//true if any value appears at least twice in the array, and it should return false if every element is distinct.
+
+public class ContainsDuplicateTest {
+
+    @Test
+    void Example1() {
+        int[] arr = {1,1,3,4}; 
+        assertTrue(containsDuplicate(arr));
+    }
+    @Test
+    void Example2() {
+        int[] arr = {1,3,4}; 
+        assertFalse(containsDuplicate(arr));
+    }
+    @Test
+    void Example3() {
+        int[] arr = {1,1,2,2}; 
+        assertFalse(containsDuplicate(arr));
+    }
+
+}