ISSUE-28: Make tests compatible with static frontend.

backend/src/main/java/com/example/backend/controller/ActorController.java

@@ -7,8 +7,10 @@
 import lombok.AllArgsConstructor;
 import lombok.NonNull;
 import org.jetbrains.annotations.NotNull;
+import org.springframework.http.HttpMethod;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.servlet.resource.NoResourceFoundException;
 
 import java.util.List;
 
@@ -32,11 +34,31 @@ public List<ActorResponse> getByName(@PathVariable @NonNull String prefix) {
         return actorService.getActorsByPrefix(prefix).stream().map(ActorResponse::from).toList();
     }
 
+    /**
+     * Prevents the frontend fallback response from being returned if the request path is invalid.
+     *
+     * @throws NoResourceFoundException
+     */
+    @GetMapping("/autocompletion/")
+    public void getByNameInvalid() throws NoResourceFoundException {
+        throw new NoResourceFoundException(HttpMethod.GET, "/api/actor/autocompletion/");
+    }
+
     @GetMapping("/movie/{movieId}")
     public List<ActorResponse> getByMovieId(@PathVariable @NonNull Long movieId) {
         return actorService.getActorsByMovieId(movieId).stream().map(ActorResponse::from).toList();
     }
 
+    /**
+     * Prevents the frontend fallback response from being returned if the request path is invalid.
+     *
+     * @throws NoResourceFoundException
+     */
+    @GetMapping("/movie/")
+    public void getByMovieIdInvalid() throws NoResourceFoundException {
+        throw new NoResourceFoundException(HttpMethod.GET, "/api/actor/movie/");
+    }
+
     @PutMapping
     public void update() {
         // TODO