Refactor cart service and controller

Add unit test for cart service

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartController.java

@@ -17,9 +17,7 @@ public CartController(CartService cartService) {
     }
 
     @GetMapping("/carts")
-    public ResponseEntity<List<CartResponse>> getCart() { // NOSONAR
-//        return ResponseEntity.ok().build();
-
+    public ResponseEntity<List<CartResponse>> getCart() {
         return new ResponseEntity<>(cartService.getAll(), HttpStatus.OK);
     }
 }

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartService.java

@@ -24,16 +24,9 @@ public List<CartResponse> getAll(){
         if(carts.isEmpty()){
             throw new NotFoundException("Cart not found");
         }
-
-//        CartResponse cartResponse = new CartResponse();
-        List<CartResponse> cartResponseList = new ArrayList<CartResponse>();
+        List<CartResponse> cartResponseList = new ArrayList<>();
         for (Cart cart: carts){
             List<CartItem> cartItems = cartItemService.findByUsername(cart.getUsername());
-            //Calculate for each username
-//            BigDecimal discount = 0;
-//            for (CartItem cartItem: cartItems){
-//
-//            }
             CartResponse cartResponse = new CartResponse(
                     cart.getUsername(),
                     cartItems,

kbazaar/src/test/java/com/kampus/kbazaar/cart/CartServiceTest.java

@@ -0,0 +1,63 @@
+package com.kampus.kbazaar.cart;
+
+import com.kampus.kbazaar.cartItem.CartItem;
+import com.kampus.kbazaar.cartItem.CartItemService;
+import com.kampus.kbazaar.exceptions.NotFoundException;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+
+import java.math.BigDecimal;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.when;
+
+class CartServiceTest {
+
+    @Mock private CartRepository cartRepository;
+    @Mock private CartItemService cartItemService;
+
+    @InjectMocks private CartService cartService;
+
+
+
+    @BeforeEach
+    void setUp() {
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    void shouldBeThrowNotFoundExceptionWhenCardEmpty(){
+        //Arrange
+        when(cartRepository.findAll()).thenReturn(List.of());
+
+        //Act & Assert
+        assertThrows(NotFoundException.class,() -> cartService.getAll());
+
+    }
+
+    @Test
+    void shouldBeAbleToListCartResponse(){
+        //Arrange
+        String username = "TechNinja";
+        Cart cart = new Cart();
+        cart.setUsername(username);
+        when(cartRepository.findAll()).thenReturn(List.of(cart));
+
+        CartItem cartItem = new CartItem(1L,"TechNinja","BEV-COCA-COLA","Coca-Cola",BigDecimal.valueOf(10),BigDecimal.valueOf(10),BigDecimal.valueOf(10),"FIXEDAMOUNT10");
+
+        when(cartItemService.findByUsername(username)).thenReturn(List.of(cartItem));
+
+        //Act
+        List<CartResponse> actualResult = cartService.getAll();
+
+        //Assert
+        assertEquals(username,actualResult.get(0).getUsername());
+
+
+    }
+}