Add delete endpoint and integration tests

backend/src/main/java/com/neuefische/team2/backend/restaurant/RestaurantController.java

@@ -6,6 +6,7 @@
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.*;
@@ -38,4 +39,9 @@ public Restaurant addRestaurant(@RequestBody @Valid NewRestaurantDTO newRestaura
         Restaurant restaurant = new Restaurant(null, newRestaurantDTO.title(), newRestaurantDTO.city());
         return restaurantService.addRestaurant(restaurant);
     }
+
+    @DeleteMapping("{id}")
+    void deleteRestaurant(@PathVariable String id) {
+        restaurantService.deleteRestaurant(id);
+    }
 }

backend/src/test/java/com/neuefische/team2/backend/restaurant/RestaurantControllerIntegrationTest.java

@@ -218,4 +218,41 @@ void getRestaurantById_whenRestaurantDoesNotExist_thenReturnNotFound() throws Ex
 
 
 
+    @Test
+    void deleteRestaurant_whenNoProductInDB_thenDBStaysEmpty() throws Exception {
+        //GIVEN
+        String id = "123";
+
+        //WHEN
+        mockMvc.perform(MockMvcRequestBuilders.delete("/api/restaurants/" + id))
+                //THEN
+                .andExpect(MockMvcResultMatchers.status().isOk())
+                .andExpect(MockMvcResultMatchers.content().string(""));
+
+        mockMvc.perform(MockMvcRequestBuilders.get("/api/restaurants"))
+                .andExpect(MockMvcResultMatchers.status().isOk())
+                .andExpect(MockMvcResultMatchers.content().json("[]"));
+    }
+
+    @Test
+    @DirtiesContext
+    void deleteRestaurant_whenProductInDB_thenDBDoesNotContainProductAnymore() throws Exception {
+        //GIVEN
+        Restaurant r1 = new Restaurant(null, "test-title", "test-city");
+        Restaurant r2 = new Restaurant(null, "test-title-to-remove", "test-city");
+        Restaurant r1WithId = restaurantRepository.insert(r1);
+        Restaurant restaurantToDelete = restaurantRepository.insert(r2);
+
+        //WHEN
+        mockMvc.perform(MockMvcRequestBuilders.delete("/api/restaurants/" + restaurantToDelete.id()));
+
+        //THEN
+        mockMvc.perform(MockMvcRequestBuilders.get("/api/restaurants"))
+                .andExpect(MockMvcResultMatchers.status().isOk())
+                .andExpect(MockMvcResultMatchers.jsonPath("$..id").value(r1WithId.id()))
+                .andExpect(MockMvcResultMatchers.jsonPath("$..title").value(r1WithId.title()))
+                .andExpect(MockMvcResultMatchers.jsonPath("$..city").value(r1WithId.city()));
+    }
+
+    // TODO: Write a test to receive one restaurant as soon as POST endpoint is implemented.
 }