feat: added notification pattern (#2629)

Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>

notification/src/test/java/com/iluwatar/RegisterWorkerFormTest.java

@@ -0,0 +1,53 @@
+package com.iluwatar;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.read.ListAppender;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDate;
+import java.util.logging.Logger;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class RegisterWorkerFormTest {
+
+    private RegisterWorkerForm registerWorkerForm;
+
+    @Test
+    void submitSuccessfully() {
+        // Ensure the worker is null initially
+        registerWorkerForm = new RegisterWorkerForm("John Doe", "Engineer", LocalDate.of(1990, 1, 1));
+
+        assertNull(registerWorkerForm.worker);
+
+        // Submit the form
+        registerWorkerForm.submit();
+
+        // Verify that the worker is not null after submission
+        assertNotNull(registerWorkerForm.worker);
+
+        // Verify that the worker's properties are set correctly
+        assertEquals("John Doe", registerWorkerForm.worker.getName());
+        assertEquals("Engineer", registerWorkerForm.worker.getOccupation());
+        assertEquals(LocalDate.of(1990, 1, 1), registerWorkerForm.worker.getDateOfBirth());
+    }
+
+    @Test
+    void submitWithErrors() {
+        // Set up the worker with a notification containing errors
+        registerWorkerForm = new RegisterWorkerForm(null, null, null);
+
+        // Submit the form
+        registerWorkerForm.submit();
+
+        // Verify that the worker's properties remain unchanged
+        assertNull(registerWorkerForm.worker.getName());
+        assertNull(registerWorkerForm.worker.getOccupation());
+        assertNull(registerWorkerForm.worker.getDateOfBirth());
+
+        // Verify the presence of errors
+        assertEquals(registerWorkerForm.worker.getNotification().getErrors().size(), 4);
+    }
+
+}