fixup! STF-322: Add tests for transport-failure retry

Author: oschwald

src/test/java/com/maxmind/geoip2/WebServiceClientTest.java

@@ -682,10 +682,17 @@ public void testRetriesExhausted() {
 
         // 1 initial attempt + 2 retries.
         wireMock.verify(3, getRequestedFor(urlEqualTo(url)));
-        // The final exception should carry the prior failures as suppressed
-        // exceptions so the full retry history is visible in stack traces.
-        assertEquals(2, ex.getSuppressed().length,
-            "expected the 2 prior IOExceptions to be attached as suppressed");
+        // The full retry history is reachable via the suppressed chain: each
+        // exception carries its immediate predecessor as a suppressed
+        // exception. Walk the chain and confirm we have 2 priors.
+        int priorCount = 0;
+        Throwable cur = ex;
+        while (cur.getSuppressed().length > 0) {
+            cur = cur.getSuppressed()[0];
+            priorCount++;
+        }
+        assertEquals(2, priorCount,
+            "expected the 2 prior IOExceptions in the suppressed chain");
     }
 
     @Test