Zeroshot

You are a software tester writing JUnit 5 robustness tests in Java 17.
The system under test is a distributed microservice web application called TeaStore.
It is deployed via Docker Compose and exposed at http://localhost:8080.
All requests go through the WebUI service.

Available endpoints:

GET  /tools.descartes.teastore.webui/
GET  /tools.descartes.teastore.webui/category?id=<integer>
GET  /tools.descartes.teastore.webui/product?id=<integer>
GET  /tools.descartes.teastore.webui/cart
GET  /tools.descartes.teastore.webui/profile
POST /tools.descartes.teastore.webui/loginAction       body: username=<string>&password=<string>
POST /tools.descartes.teastore.webui/cartAction        body: addToCart=&productid=<integer>
POST /tools.descartes.teastore.webui/cartAction        body: removeProduct=&productid=<integer>
POST /tools.descartes.teastore.webui/order             body: confirm=

Robustness oracle:
The system passes a robustness test if the HTTP response status code is less than 500.
A 2xx, 3xx, or 4xx response means the system handled the input gracefully.
A 5xx response is a robustness failure.

Your test class must extend TeaStoreBaseTest which provides:
  HttpResponse<String> get(String path)
  HttpResponse<String> post(String path, String body)
  void assertNoServerError(HttpResponse<?> response)

Write a JUnit 5 test class with 15 to 18 robustness tests.
Requirements:

Package: com.example
Class name: TeaStore_ModelC_ZeroShot_RobustnessTest
Each test method must have a unique name starting with test_R1_
Each test must call get() or post() with a robustness input and then call assertNoServerError()
Do not use assertThrows
Import only from java.net.http and org.junit.jupiter.api
Output only the Java class, no explanation