diff --git a/src/test/java/MainTest.java b/src/test/java/MainTest.java
new file mode 100644
index 0000000..df33137
--- /dev/null
+++ b/src/test/java/MainTest.java
@@ -0,0 +1,102 @@
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+import resources.StockManagement;
+import values.Item;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class MainTest {
+
+	@Test
+	public void test() {
+		StockManagement stockMan = new StockManagement();
+		stockMan.arrive(10, "A");
+		System.out.println("Arrive A: 10");
+		stockMan.arrive(20, "B");
+		System.out.println("Arrive B: 20");
+		
+		Map<String, Integer> stock1 = stockMan.getStock();
+		Map<String, Integer> shortage1 = stockMan.getShortage();
+		Item shipping1 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock1.get("A"));
+		System.out.println("B: " + stock1.get("B"));
+		assertEquals((int)stock1.get("A"), 10);
+		assertEquals((int)stock1.get("B"), 20);
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage1.get("A"));
+		System.out.println("B: " + shortage1.get("B"));
+		assertEquals((int)shortage1.get("A"), 0);
+		assertEquals((int)shortage1.get("B"), 0);
+		System.out.println("shipping:");
+		if (shipping1 != null) System.out.println(shipping1.getName() +": " + shipping1.getNum());
+		
+		
+		stockMan.req(5, "A");	
+		System.out.println("Request A: 5");
+		
+		Map<String, Integer> stock2 = stockMan.getStock();
+		Map<String, Integer> shortage2 = stockMan.getShortage();
+		Item shipping2 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock2.get("A"));
+		System.out.println("B: " + stock2.get("B"));
+		assertEquals((int)stock2.get("A"), 5);
+		assertEquals((int)stock2.get("B"), 20);
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage2.get("A"));
+		System.out.println("B: " + shortage2.get("B"));
+		assertEquals((int)shortage2.get("A"), 0);
+		assertEquals((int)shortage2.get("B"), 0);
+		System.out.println("shipping:");
+		if (shipping2 != null) {
+			System.out.println(shipping2.getName() +": " + shipping2.getNum());
+			assertEquals(shipping2.getName(), "A");
+			assertEquals(shipping2.getNum(), 5);
+		}
+		
+		stockMan.req(10, "A");
+		System.out.println("Request A: 10");
+		
+		Map<String, Integer> stock3 = stockMan.getStock();
+		Map<String, Integer> shortage3 = stockMan.getShortage();
+		Item shipping3 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock3.get("A"));
+		System.out.println("B: " + stock3.get("B"));
+		assertEquals((int)stock3.get("A"), 5);
+		assertEquals((int)stock3.get("B"), 20);
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage3.get("A"));
+		System.out.println("B: " + shortage3.get("B"));
+		assertEquals((int)shortage3.get("A"), 10);
+		assertEquals((int)shortage3.get("B"), 0);
+		System.out.println("shipping:");
+		if (shipping3 != null) System.out.println(shipping3.getName() +": " + shipping3.getNum());
+ 
+		stockMan.arrive(10, "A");		
+		System.out.println("Arrive A: 10");
+		
+		Map<String, Integer> stock4 = stockMan.getStock();
+		Map<String, Integer> shortage4 = stockMan.getShortage();
+		Item shipping4 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock4.get("A"));
+		System.out.println("B: " + stock4.get("B"));
+		assertEquals((int)stock4.get("A"), 5);
+		assertEquals((int)stock4.get("B"), 20);
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage4.get("A"));
+		System.out.println("B: " + shortage4.get("B"));
+		assertEquals((int)shortage4.get("A"), 0);
+		assertEquals((int)shortage4.get("B"), 0);
+		System.out.println("shipping:");
+		if (shipping4 != null) {
+			System.out.println(shipping4.getName() +": " + shipping4.getNum());
+			assertEquals(shipping4.getName(), "A");
+			assertEquals(shipping4.getNum(), 10);
+		}
+	}
+ 
+}