Flip assertion to expected correct behavior

Author: Qian-Cheng-nju

jraft-core/src/test/java/com/alipay/sofa/jraft/core/VotePersistenceBugTest.java

@@ -232,12 +232,11 @@ public void testDoubleVoteAfterCrashBetweenPersistPhases() throws Exception {
         assertTrue(cluster.start(voter.getEndpoint()));
         Thread.sleep(1000);
 
-        // vote for candidate2 in the same term — should be rejected but is granted (bug)
+        // vote for candidate2 in the same term — should be rejected
         final NodeImpl node2 = (NodeImpl) cluster.getNodes().get(0);
         final RequestVoteResponse resp2 = (RequestVoteResponse) node2.handleRequestVoteRequest(buildVoteRequest(
             candidate2, voter, 100));
-        // Bug: double-vote granted; flip to assertFalse after fix
-        assertTrue("double-vote: node voted for both " + candidate1 + " and " + candidate2 + " in term 100",
+        assertFalse("double-vote: node voted for both " + candidate1 + " and " + candidate2 + " in term 100",
             resp2.getGranted());
 
         cluster.stopAll();