adding controller method for patch

Author: springframeworkguru

src/main/java/guru/springfamework/controllers/v1/CustomerController.java

@@ -46,4 +46,10 @@ public ResponseEntity<CustomerDTO> updateCustomer(@PathVariable Long id, @Reques
         return new ResponseEntity<CustomerDTO>(customerService.saveCustomerByDTO(id, customerDTO),
                 HttpStatus.OK);
     }
+
+    @PatchMapping({"/{id}"})
+    public ResponseEntity<CustomerDTO> patchCustomer(@PathVariable Long id, @RequestBody CustomerDTO customerDTO){
+        return new ResponseEntity<CustomerDTO>(customerService.patchCustomer(id, customerDTO),
+                HttpStatus.OK);
+    }
 }

src/main/java/guru/springfamework/services/CustomerServiceImpl.java

@@ -85,7 +85,12 @@ public CustomerDTO patchCustomer(Long id, CustomerDTO customerDTO) {
                 customer.setLastname(customerDTO.getLastname());
             }
 
-            return customerMapper.customerToCustomerDTO(customerRepository.save(customer));
+            CustomerDTO returnDto = customerMapper.customerToCustomerDTO(customerRepository.save(customer));
+
+            returnDto.setCustomerUrl("/api/v1/customer/" + id);
+
+            return returnDto;
+
         }).orElseThrow(RuntimeException::new); //todo implement better exception handling;
     }
 }

src/test/java/guru/springfamework/controllers/v1/CustomerControllerTest.java

@@ -125,4 +125,27 @@ public void testUpdateCustomer() throws Exception {
                 .andExpect(jsonPath("$.lastname", equalTo("Flintstone")))
                 .andExpect(jsonPath("$.customer_url", equalTo("/api/v1/customers/1")));
     }
+
+    @Test
+    public void testPatchCustomer() throws Exception {
+
+        //given
+        CustomerDTO customer = new CustomerDTO();
+        customer.setFirstname("Fred");
+
+        CustomerDTO returnDTO = new CustomerDTO();
+        returnDTO.setFirstname(customer.getFirstname());
+        returnDTO.setLastname("Flintstone");
+        returnDTO.setCustomerUrl("/api/v1/customers/1");
+
+        when(customerService.patchCustomer(anyLong(), any(CustomerDTO.class))).thenReturn(returnDTO);
+
+        mockMvc.perform(patch("/api/v1/customers/1")
+                .contentType(MediaType.APPLICATION_JSON)
+                .content(asJsonString(customer)))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.firstname", equalTo("Fred")))
+                .andExpect(jsonPath("$.lastname", equalTo("Flintstone")))
+                .andExpect(jsonPath("$.customer_url", equalTo("/api/v1/customers/1")));
+    }
 }