fix test

src/test/java/AppTest.java

@@ -1,4 +1,4 @@
-import com.example.App;
+import com.example.Application;
 import org.junit.Test;
 import static org.junit.Assert.*;
 
@@ -6,7 +6,7 @@ public class AppTest {
 
     @Test
     public void testApp() {
-        App myApp = new App();
+        Application myApp = new Application();
 
         String result = myApp.getStatus();