POST

- URI for Location Header
- CRUD - create

src/main/java/djmil/cashcard/CashCardController.java

@@ -2,10 +2,14 @@ package djmil.cashcard;
 
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.util.UriComponentsBuilder;
 
+import java.net.URI;
 import java.util.Optional;
 
 @RestController
@@ -28,4 +32,15 @@ public class CashCardController {
             return ResponseEntity.notFound().build();
         }
     }
+
+    @PostMapping
+    private ResponseEntity<Void> createCashCard(@RequestBody CashCard newCashCardRequest, UriComponentsBuilder ucb) {
+        CashCard savedCashCard = cashCardRepository.save(newCashCardRequest); // CRUD - Create
+        
+        URI locationOfNewCashCard = ucb
+                .path("cashcards/{id}")
+                .buildAndExpand(savedCashCard.id())
+                .toUri();
+        return ResponseEntity.created(locationOfNewCashCard).build();
+    }
 }

src/test/java/djmil/cashcard/CashcardApplicationTests.java

@@ -11,6 +11,8 @@ import org.springframework.http.ResponseEntity;
 import com.jayway.jsonpath.DocumentContext;
 import com.jayway.jsonpath.JsonPath;
 
+import java.net.URI;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
@@ -45,4 +47,24 @@ class CashcardApplicationTests {
   		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.NOT_FOUND);
 		assertThat(response.getBody()).isBlank();
 	}
+
+	@Test
+	void shouldCreateANewCashCard() {
+		CashCard newCashCard = new CashCard(null, 250.00);
+		ResponseEntity<Void> createResponse = restTemplate.postForEntity("/cashcards", newCashCard, Void.class );
+
+		assertThat(createResponse.getStatusCode()).isEqualTo(HttpStatus.CREATED);
+
+		URI locationOfNewCashCard = createResponse.getHeaders().getLocation();
+   		ResponseEntity<String> getResponse = restTemplate.getForEntity(locationOfNewCashCard, String.class);
+   		assertThat(getResponse.getStatusCode()).isEqualTo(HttpStatus.OK);
+
+		// Validate created CashCard JSON 
+		DocumentContext documentContext = JsonPath.parse(getResponse.getBody());
+		Number id = documentContext.read("$.id");
+		Double amount = documentContext.read("$.amount");
+
+		assertThat(id).isNotNull();
+		assertThat(amount).isEqualTo(250.00);
+	}
 }