Fix false negative test case for AsyncFeign Retry feature (#1795)

False negative test case is added in PR #1757

Co-authored-by: Marvin Froeder <velo@users.noreply.github.com>

core/src/test/java/feign/AsyncFeignTest.java

@@ -564,39 +564,39 @@ public void throwsFeignExceptionWithoutBody() {
   }
 
   @Test
-  public void ensureRetryerClonesItself() throws Exception {
+  public void ensureRetryerClonesItself() throws Throwable {
     server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 1"));
     server.enqueue(new MockResponse().setResponseCode(200).setBody("foo 2"));
     server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 3"));
     server.enqueue(new MockResponse().setResponseCode(200).setBody("foo 4"));
 
     MockRetryer retryer = new MockRetryer();
 
-    FeignTest.TestInterface api = Feign.builder()
+    TestInterfaceAsync api = AsyncFeign.builder()
         .retryer(retryer)
         .errorDecoder(new ErrorDecoder() {
           @Override
           public Exception decode(String methodKey, Response response) {
             return new RetryableException(response.status(), "play it again sam!", HttpMethod.POST,
                 null, response.request());
           }
-        }).target(FeignTest.TestInterface.class, "http://localhost:" + server.getPort());
+        }).target(TestInterfaceAsync.class, "http://localhost:" + server.getPort());
 
-    api.post();
-    api.post(); // if retryer instance was reused, this statement will throw an exception
+    unwrap(api.post());
+    unwrap(api.post()); // if retryer instance was reused, this statement will throw an exception
     assertEquals(4, server.getRequestCount());
   }
 
   @Test
-  public void throwsOriginalExceptionAfterFailedRetries() throws Exception {
+  public void throwsOriginalExceptionAfterFailedRetries() throws Throwable {
     server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 1"));
     server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 2"));
 
     final String message = "the innerest";
     thrown.expect(TestInterfaceException.class);
     thrown.expectMessage(message);
 
-    TestInterfaceAsync api = Feign.builder()
+    TestInterfaceAsync api = AsyncFeign.builder()
         .exceptionPropagationPolicy(UNWRAP)
         .retryer(new Retryer.Default(1, 1, 2))
         .errorDecoder(new ErrorDecoder() {
@@ -607,19 +607,19 @@ public Exception decode(String methodKey, Response response) {
           }
         }).target(TestInterfaceAsync.class, "http://localhost:" + server.getPort());
 
-    api.post();
+    unwrap(api.post());
   }
 
   @Test
-  public void throwsRetryableExceptionIfNoUnderlyingCause() throws Exception {
+  public void throwsRetryableExceptionIfNoUnderlyingCause() throws Throwable {
     server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 1"));
     server.enqueue(new MockResponse().setResponseCode(503).setBody("foo 2"));
 
     String message = "play it again sam!";
     thrown.expect(RetryableException.class);
     thrown.expectMessage(message);
 
-    TestInterfaceAsync api = Feign.builder()
+    TestInterfaceAsync api = AsyncFeign.builder()
         .exceptionPropagationPolicy(UNWRAP)
         .retryer(new Retryer.Default(1, 1, 2))
         .errorDecoder(new ErrorDecoder() {
@@ -630,7 +630,7 @@ public Exception decode(String methodKey, Response response) {
           }
         }).target(TestInterfaceAsync.class, "http://localhost:" + server.getPort());
 
-    api.post();
+    unwrap(api.post());
   }
 
   @SuppressWarnings("deprecation")