added test for productRepo

src/test/java/ntnu/idatt2016/v233/SmartMat/repository/ProductRepositoryTest.java

+package ntnu.idatt2016.v233.SmartMat.repository;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;
+
+import ntnu.idatt2016.v233.SmartMat.entity.product.Product;
+
+@DataJpaTest
+public class ProductRepositoryTest {
+
+    @Autowired
+    private ProductRepository productRepository;
+
+    @Autowired
+    private TestEntityManager entityManager;
+
+    private Product product;
+
+    @BeforeEach
+    public void setUp() {
+        product = Product.builder()
+                .ean(1234567890123L)
+                .name("Test Product")
+                .description("This is a test product")
+                .category_name("TestCategory")
+                .build();
+        entityManager.persist(product);
+    }
+
+    @Test
+    @DisplayName("Test getProductByName")
+    public void testGetProductByName() {
+        Optional<Product> foundProduct = productRepository.getByName(product.getName());
+        assertTrue(foundProduct.isPresent());
+        assertEquals(product.getName(), foundProduct.get().getName());
+    }
+
+    @Test
+    @DisplayName("Test getProductByNameNotFound")
+    public void testGetProductByNameNotFound() {
+        Optional<Product> foundProduct = productRepository.getByName("Nonexistent Product");
+        assertFalse(foundProduct.isPresent());
+    }
+
+    @Test
+    @DisplayName("Test getAllProducts")
+    public void testGetAllProducts() {
+        List<Product> products = productRepository.findAll();
+        assertNotNull(products);
+        assertEquals(1, products.size());
+    }
+
+    @Test
+    @DisplayName("Test saveProduct")
+    public void testSaveProduct() {
+        Product newProduct = Product.builder()
+                .ean(1234567890124L)
+                .name("New Product")
+                .description("This is a new product")
+                .category_name("TestCategory")
+                .build();
+        productRepository.save(newProduct);
+        List<Product> products = productRepository.findAll();
+        assertNotNull(products);
+        assertEquals(2, products.size());
+    }
+
+    @Test
+    @DisplayName("Test deleteProduct")
+    public void testDeleteProduct() {
+        productRepository.delete(product);
+        List<Product> products = productRepository.findAll();
+        assertNotNull(products);
+        assertEquals(0, products.size());
+    }
+
+}