finish all unit tests

src/test/java/com/example/model/CustomerRegistrationRequestTest.java

@@ -0,0 +1,172 @@
+package com.example.model;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * Unit tests for CustomerRegistrationRequest model class
+ */
+@DisplayName("CustomerRegistrationRequest Model Tests")
+class CustomerRegistrationRequestTest {
+
+    @Test
+    @DisplayName("Should create CustomerRegistrationRequest with default constructor")
+    void testDefaultConstructor() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest();
+
+        assertNotNull(request);
+        assertNull(request.getCustomerName());
+        assertFalse(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should create CustomerRegistrationRequest with parameterized constructor")
+    void testParameterizedConstructor() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest("John Doe", true);
+
+        assertEquals("John Doe", request.getCustomerName());
+        assertTrue(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should set and get customerName")
+    void testSetAndGetCustomerName() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest();
+        request.setCustomerName("Jane Smith");
+
+        assertEquals("Jane Smith", request.getCustomerName());
+    }
+
+    @Test
+    @DisplayName("Should set and get blacklisted status")
+    void testSetAndGetBlacklisted() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest();
+        request.setBlacklisted(true);
+
+        assertTrue(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should handle null customerName")
+    void testNullCustomerName() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest(null, false);
+
+        assertNull(request.getCustomerName());
+        assertFalse(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should handle empty string customerName")
+    void testEmptyCustomerName() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest("", true);
+
+        assertEquals("", request.getCustomerName());
+        assertTrue(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should create non-blacklisted customer by default")
+    void testNonBlacklistedByDefault() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest("Test User", false);
+
+        assertFalse(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should create blacklisted customer")
+    void testBlacklistedCustomer() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest("Blacklisted User", true);
+
+        assertTrue(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should generate correct toString output")
+    void testToString() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest("Alice Brown", true);
+        String result = request.toString();
+
+        assertNotNull(result);
+        assertTrue(result.contains("CustomerRegistrationRequest{"));
+        assertTrue(result.contains("customerName='Alice Brown'"));
+        assertTrue(result.contains("blacklisted=true"));
+    }
+
+    @Test
+    @DisplayName("Should generate toString with null customerName")
+    void testToStringWithNull() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest(null, false);
+        String result = request.toString();
+
+        assertNotNull(result);
+        assertTrue(result.contains("customerName='null'") || result.contains("customerName=null"));
+        assertTrue(result.contains("blacklisted=false"));
+    }
+
+    @Test
+    @DisplayName("Should handle special characters in customerName")
+    void testSpecialCharactersInCustomerName() {
+        String specialName = "José O'Reilly-Smith";
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest(specialName, false);
+
+        assertEquals(specialName, request.getCustomerName());
+    }
+
+    @Test
+    @DisplayName("Should update values multiple times")
+    void testMultipleUpdates() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest("Initial Name", false);
+
+        request.setCustomerName("Updated Name");
+        request.setBlacklisted(true);
+
+        assertEquals("Updated Name", request.getCustomerName());
+        assertTrue(request.isBlacklisted());
+
+        request.setCustomerName("Final Name");
+        request.setBlacklisted(false);
+
+        assertEquals("Final Name", request.getCustomerName());
+        assertFalse(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should toggle blacklisted status")
+    void testToggleBlacklistedStatus() {
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest("Toggle User", false);
+
+        assertFalse(request.isBlacklisted());
+
+        request.setBlacklisted(true);
+        assertTrue(request.isBlacklisted());
+
+        request.setBlacklisted(false);
+        assertFalse(request.isBlacklisted());
+    }
+
+    @Test
+    @DisplayName("Should handle very long customerName")
+    void testLongCustomerName() {
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < 1000; i++) {
+            builder.append("A");
+        }
+        String longName = builder.toString();
+        CustomerRegistrationRequest request = new CustomerRegistrationRequest(longName, true);
+
+        assertEquals(longName, request.getCustomerName());
+        assertEquals(1000, request.getCustomerName().length());
+    }
+
+    @Test
+    @DisplayName("Should handle whitespace in customerName")
+    void testWhitespaceInCustomerName() {
+        CustomerRegistrationRequest request1 = new CustomerRegistrationRequest("  ", false);
+        assertEquals("  ", request1.getCustomerName());
+
+        CustomerRegistrationRequest request2 = new CustomerRegistrationRequest("John  Doe", false);
+        assertEquals("John  Doe", request2.getCustomerName());
+    }
+}