Add loop printing numbers 1-10 to main output

pom.xml

@@ -17,6 +17,8 @@
   </dependencies>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target>
   </properties>
   <build>
     <pluginManagement>

src/main/java/com/mycompany/app/App.java

@@ -12,6 +12,9 @@ public App() {}
 
     public static void main(String[] args) {
         System.out.println(new App().getMessage());
+        for (int i = 1; i <= 10; i++) {
+            System.out.println(i);
+        }
     }
 
     private final String getMessage() {

src/test/java/com/mycompany/app/AppTest.java

@@ -34,9 +34,13 @@ public void testAppMain()
     {
         App.main(null);
         try {
-            assertEquals("Hello World!" + System.getProperty("line.separator"), outContent.toString());
+            String expectedOutput = "Hello World!" + System.getProperty("line.separator");
+            for (int i = 1; i <= 10; i++) {
+                expectedOutput += i + System.getProperty("line.separator");
+            }
+            assertEquals(expectedOutput, outContent.toString());
         } catch (AssertionError e) {
-            fail("\"message\" is not \"Hello World!\"");
+            fail("Output does not match expected format with loop from 1 to 10");
         }
     }