diff --git a/Searches/IBSearch_test.java b/Searches/IBSearch_test.java
new file mode 100644
index 00000000..9746932d
--- /dev/null
+++ b/Searches/IBSearch_test.java
@@ -0,0 +1,30 @@
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+public class IterativeBinarySearch_Test {
+	
+//	kiem thu luong du lieu
+//	ham search dung de tim key trong mang da xap xep
+//	dua theo tieu chi all-du path tim dc 4 tescase
+	Integer[] arr = {0,1,2,3,4,5,6,7,8,9,10};
+	IterativeBinarySearch search = new IterativeBinarySearch();
+		@Test
+		void tc1_key_khong_co_trong_mang() {
+			 assertTrue(search.find(arr, 11)==-1);
+		}
+		@Test
+		void tc2_key_nam_chinh_giua_mang() {
+			 assertTrue(search.find(arr, 5)==5);
+		}
+		@Test
+		void tc3_key_nam_cuoi_mang() {
+			 assertTrue(search.find(arr, 10)==10);
+		}
+		@Test
+		void tc4_key_nam_dau_mang() {
+			 assertTrue(search.find(arr, 0)==0);
+		}
+	}
+		
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