fix quality (coverage) #2

Author: HabibaMekay

table-inheritance/src/test/java/AppTest.java

@@ -0,0 +1,28 @@
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.iluwatar.table.inheritance.App;
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import org.junit.jupiter.api.Test;
+
+class AppTest {
+
+  /**
+   * Tests if the main method runs without throwing exceptions and prints expected output.
+   */
+  @Test
+   void testAppMainMethod() {
+
+    ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+    System.setOut(new PrintStream(outContent));
+
+
+    App.main(new String[]{});
+
+    String output = outContent.toString();
+
+    assertTrue(output.contains("Retrieved Vehicle:"));
+    assertTrue(output.contains("Retrieved Car:"));
+    assertTrue(output.contains("Retrieved Truck:"));
+  }
+}