Add generated v2 test support (#1953)

* Add a method to stub requests that return an error status * Fix semicolons * rebase and update

Author: helenye-stripe

src/test/java/com/stripe/BaseStripeTest.java

@@ -20,6 +20,7 @@
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -32,6 +33,7 @@
 import org.mockito.ArgumentMatcher;
 import org.mockito.Mockito;
 import org.mockito.exceptions.base.MockitoAssertionError;
+import org.mockito.stubbing.Answer;
 
 public class BaseStripeTest {
  private static final String MOCK_MINIMUM_VERSION = "0.109.0";
@@ -348,6 +350,35 @@ public static <T extends StripeObjectInterface> void stubRequest(
  Mockito.<Type>any());
  }
 
+ /**
+ * Stubs an API request. This should rarely be necessary, but some endpoints are not supported by
+ * stripe-mock yet.
+ *
+ * @param method HTTP method (GET, POST or DELETE)
+ * @param path request path (e.g. "/v1/charges"). Can also be an abolute URL.
+ * @param params map containing the parameters. If null, the parameters are not checked.
+ * @param options request options. If null, the options are not checked.
+ * @param typeToken Class of the API resource that will be returned for the stubbed request.
+ * @param response JSON payload of the API resource that will be returned for the stubbed request.
+ */
+ public static <T extends StripeObjectInterface> void stubRequestReturnError(
+ BaseAddress baseAddress,
+ ApiResource.RequestMethod method,
+ String path,
+ Map<String, Object> params,
+ RequestOptions options,
+ String response,
+ Integer code)
+ throws StripeException {
+
+ Mockito.doAnswer(
+ (Answer<StripeResponse>)
+ invocation ->
+ new StripeResponse(400, HttpHeaders.of(Collections.emptyMap()), response))
+ .when(httpClientSpy)
+ .request(Mockito.any());
+ }
+
  /** Stubs an OAuth API request. stripe-mock does not supported OAuth endpoints at this time. */
  public static <T extends StripeObjectInterface> void stubOAuthRequest(
  Class<T> clazz, String response) throws StripeException {