Add junit tests for utils classes

src/test/java/stirling/software/SPDF/utils/ErrorUtilsTest.java

@@ -0,0 +1,45 @@
+package stirling.software.SPDF.utils;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.ui.Model;
+import org.springframework.web.servlet.ModelAndView;
+
+public class ErrorUtilsTest {
+
+    @Test
+    public void testExceptionToModel() {
+        // Create a mock Model
+        Model model = new org.springframework.ui.ExtendedModelMap();
+
+        // Create a test exception
+        Exception ex = new Exception("Test Exception");
+
+        // Call the method under test
+        Model resultModel = ErrorUtils.exceptionToModel(model, ex);
+
+        // Verify the result
+        assertNotNull(resultModel);
+        assertEquals("Test Exception", resultModel.getAttribute("errorMessage"));
+        assertNotNull(resultModel.getAttribute("stackTrace"));
+    }
+
+    @Test
+    public void testExceptionToModelView() {
+        // Create a mock Model
+        Model model = new org.springframework.ui.ExtendedModelMap();
+
+        // Create a test exception
+        Exception ex = new Exception("Test Exception");
+
+        // Call the method under test
+        ModelAndView modelAndView = ErrorUtils.exceptionToModelView(model, ex);
+
+        // Verify the result
+        assertNotNull(modelAndView);
+        assertEquals("Test Exception", modelAndView.getModel().get("errorMessage"));
+        assertNotNull(modelAndView.getModel().get("stackTrace"));
+    }
+}