tls/test: Updated test_reload_certificates

Now handling situations where the get() call doesn't throw but does
return an empty buffer indicating EOF.

Signed-off-by: Michael Boquard <[email protected]>

Author: michael-redpanda

tests/unit/tls_test.cc

@@ -1068,8 +1068,12 @@ SEASTAR_THREAD_TEST_CASE(test_reload_certificates) {
             }
 
             try {
-                f2.get();
-                BOOST_FAIL("should not reach");
+                auto res = f2.get();
+                // If the server completes sending data to the client
+                // during the handshake before the client has fully
+                // closed its connection, then the get() call will
+                // succeed by return an empty buffer indicating EOF
+                BOOST_REQUIRE(res.size() == 0);
             } catch (...) {
                 // ok
             }