add testing for find product by sku / invalid sku

src/main/java/com/nisum/ascend/inventory/controller/ProductController.java

@@ -19,8 +19,8 @@ public class ProductController {
     ProductService productService;
 
     @GetMapping("{sku}")
-    public ResponseEntity<Mono<ProductDto>> getProductDto(@PathVariable String sku) {
-        Mono<ProductDto> monoProd = productService.getProduct(sku);
+    public ResponseEntity<Mono<ProductDto>> getProductBySku(@PathVariable String sku) {
+        Mono<ProductDto> monoProd = productService.getProductBySku(sku);
         HttpStatus status = monoProd != null ? HttpStatus.OK : HttpStatus.NOT_FOUND;
         return new ResponseEntity<>(monoProd, status);
     }

src/main/java/com/nisum/ascend/inventory/service/ProductService.java

@@ -17,7 +17,7 @@ public class ProductService {
     @Autowired
     ProductRepository productRepository;
 
-    public Mono<ProductDto> getProduct(String sku){
+    public Mono<ProductDto> getProductBySku(String sku){
         return productRepository.findBySku(sku)
                 .map(existingProduct -> generateDtoFromProduct(existingProduct))
                 .switchIfEmpty(Mono.error(new ResourceNotFoundException(HttpStatus.NOT_FOUND, "product not found")));

src/test/java/com/nisum/ascend/inventory/controller/ProductControllerTest.java

 package com.nisum.ascend.inventory.controller;
 
+import com.nisum.ascend.inventory.dto.ProductDto;
+import com.nisum.ascend.inventory.model.Product;
+import com.nisum.ascend.inventory.repository.ProductRepository;
+import com.nisum.ascend.inventory.service.ProductService;
+import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.web.bind.annotation.ResponseBody;
+import reactor.core.publisher.Mono;
 
 import static org.junit.jupiter.api.Assertions.*;
 
+@ExtendWith(SpringExtension.class) //integrates springtestframework into junit 5
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT) //provides support for testing springboot app
+@DirtiesContext
+@AutoConfigureWebTestClient //autoconfigures the webclient
+@ActiveProfiles("test")
+@Slf4j
 class ProductControllerTest {
 
-    @BeforeEach
-    void setUp() {
+    @Autowired
+    private WebTestClient client;
+
+    @Test
+    void testProductInvalidSkuNotFound() {
+        client
+                .get()
+                .uri("/products/".concat("{sku}"), "invalid")
+                .exchange()
+                .expectStatus()
+                .is5xxServerError();
     }
 
     @Test
-    void getProductDto() {
+    void testProductBySkuFound() {
+        String sku = "100000";
+
+        client.get()
+                .uri("/products/".concat("/{sku}"), sku)
+                .exchange()
+                .expectStatus()
+                .isOk()
+                .expectBody()
+                .jsonPath("$.sku", sku);
     }
 }
\ No newline at end of file