diff --git a/.classpath b/.classpath
index 85d2273..417419d 100644
--- a/.classpath
+++ b/.classpath
@@ -6,6 +6,7 @@
 			<attribute name="gradle_used_by_scope" value="main,test"/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="src" path="src/test/java"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8/"/>
 	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
 	<classpathentry kind="output" path="bin/default"/>
diff --git a/src/test/java/TestMain.java b/src/test/java/TestMain.java
new file mode 100644
index 0000000..d9851a9
--- /dev/null
+++ b/src/test/java/TestMain.java
@@ -0,0 +1,73 @@
+import java.util.Map;
+ 
+import resources.StockManagement;
+ 
+public class TestMain {
+ 
+	public static void main(String[] args) {
+		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();
+		Map.Entry<String, Integer> shipping1 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock1.get("A"));
+		System.out.println("B: " + stock1.get("B"));
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage1.get("A"));
+		System.out.println("B: " + shortage1.get("B"));
+		System.out.println("shipping:");
+		if (shipping1 != null) System.out.println(shipping1.getKey() +": " + shipping1.getValue());
+		
+		
+		stockMan.req(5, "A");	
+		System.out.println("Request A: 5");
+		
+		Map<String, Integer> stock2 = stockMan.getStock();
+		Map<String, Integer> shortage2 = stockMan.getShortage();
+		Map.Entry<String, Integer> shipping2 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock2.get("A"));
+		System.out.println("B: " + stock2.get("B"));
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage2.get("A"));
+		System.out.println("B: " + shortage2.get("B"));
+		System.out.println("shipping:");
+		if (shipping2 != null) System.out.println(shipping2.getKey() +": " + shipping2.getValue());
+		
+		stockMan.req(10, "A");
+		System.out.println("Request A: 10");
+		
+		Map<String, Integer> stock3 = stockMan.getStock();
+		Map<String, Integer> shortage3 = stockMan.getShortage();
+		Map.Entry<String, Integer> shipping3 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock3.get("A"));
+		System.out.println("B: " + stock3.get("B"));
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage3.get("A"));
+		System.out.println("B: " + shortage3.get("B"));
+		System.out.println("shipping:");
+		if (shipping3 != null) System.out.println(shipping3.getKey() +": " + shipping3.getValue());
+ 
+		stockMan.arrive(10, "A");		
+		System.out.println("Arrive A: 10");
+		
+		Map<String, Integer> stock4 = stockMan.getStock();
+		Map<String, Integer> shortage4 = stockMan.getShortage();
+		Map.Entry<String, Integer> shipping4 = stockMan.getShipping();
+		System.out.println("stock:");
+		System.out.println("A: " + stock4.get("A"));
+		System.out.println("B: " + stock4.get("B"));
+		System.out.println("shotage:");
+		System.out.println("A: " + shortage4.get("A"));
+		System.out.println("B: " + shortage4.get("B"));
+		System.out.println("shipping:");
+		if (shipping4 != null) System.out.println(shipping4.getKey() +": " + shipping4.getValue());
+	}
+ 
+}