Added/updated tests

src/test/java/de/rwu/easydrop/api/dto/ProductDTOTest.java

@@ -1,33 +1,56 @@
 package de.rwu.easydrop.api.dto;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNull;
 
 import org.junit.jupiter.api.Test;
 
 class ProductDTOTest {
+
     @Test
-    void testToString1() {
-        ProductDTO product1 = new ProductDTO("12345", "Amazon");
-        product1.setMerchant("Merchant A");
-        product1.setCurrentPrice(19.99);
-        product1.setAvailable(true);
+    void constructor_SetsProductIdAndDataOrigin() {
+        // Arrange
+        String productId = "12345";
+        String dataOrigin = "Amazon";
 
-        String expectedString1 = "ProductDTO{12345 from Merchant A (Amazon) at 19,99 € (available: yes)}";
-        String result1 = product1.toString();
+        // Act
+        ProductDTO productDTO = new ProductDTO(productId, dataOrigin);
 
-        assertEquals(expectedString1, result1);
+        // Assert
+        assertEquals(productId, productDTO.getProductId());
+        assertEquals(dataOrigin, productDTO.getDataOrigin());
     }
 
     @Test
-    void testToString2() {
-        ProductDTO product2 = new ProductDTO("67890", "eBay");
-        product2.setMerchant("Merchant B");
-        product2.setCurrentPrice(9.99);
-        product2.setAvailable(false);
+    void gettersAndSetters_WorkAsExpected() {
+        // Arrange
+        ProductDTO productDTO = new ProductDTO("12345", "Amazon");
 
-        String expectedString2 = "ProductDTO{67890 from Merchant B (eBay) at 9,99 € (available: no)}";
-        String result2 = product2.toString();
+        // Act and Assert
+        assertEquals("12345", productDTO.getProductId());
+        assertEquals("Amazon", productDTO.getDataOrigin());
 
-        assertEquals(expectedString2, result2);
+        // Modify fields
+        productDTO.setProductId("54321");
+        productDTO.setDataOrigin("eBay");
+
+        // Assert
+        assertEquals("54321", productDTO.getProductId());
+        assertEquals("eBay", productDTO.getDataOrigin());
+    }
+
+    @Test
+    void defaultConstructor_SetsDefaultValues() {
+        // Act
+        ProductDTO productDTO = new ProductDTO(null, null);
+
+        // Assert
+        assertNull(productDTO.getProductId());
+        assertNull(productDTO.getDataOrigin());
+        assertEquals(0.0, productDTO.getCurrentPrice());
+        assertNull(productDTO.getMerchant());
+        assertEquals(0.0, productDTO.getDeliveryPrice());
+        assertFalse(productDTO.isAvailable());
     }
 }