test(framework): address PR review comments on test code quality

- Remove dead moreThanFrozenNumber test in FreezeBalanceV2ActuatorTest
  (error message no longer exists in production code)
- Remove unnecessary try/catch around addAssetV2 in AccountAssetStoreTest
  (method declares no checked exceptions)
- Replace try/catch pattern with Assert.assertThrows in FetchInvDataMsgHandlerTest

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Little-Peony

framework/src/test/java/org/tron/core/actuator/FreezeBalanceV2ActuatorTest.java

@@ -268,33 +268,6 @@ public void lessThan1TrxTest() {
     }
   }
 
-  //@Test
-  public void moreThanFrozenNumber() {
-    long frozenBalance = 1_000_000_000L;
-    FreezeBalanceActuator actuator = new FreezeBalanceActuator();
-    actuator.setChainBaseManager(dbManager.getChainBaseManager())
-        .setAny(getContractV2ForBandwidth(OWNER_ADDRESS, frozenBalance));
-
-    TransactionResultCapsule ret = new TransactionResultCapsule();
-    try {
-      actuator.validate();
-      actuator.execute(ret);
-    } catch (ContractValidateException | ContractExeException e) {
-      Assert.fail();
-    }
-    try {
-      actuator.validate();
-      actuator.execute(ret);
-      fail("cannot run here.");
-    } catch (ContractValidateException e) {
-      long maxFrozenNumber = ChainConstant.MAX_FROZEN_NUMBER;
-      Assert.assertEquals("max frozen number is: " + maxFrozenNumber, e.getMessage());
-    } catch (ContractExeException e) {
-      Assert.fail();
-    }
-  }
-
-
   @Test
   public void commonErrorCheck() {
     FreezeBalanceV2Actuator actuator = new FreezeBalanceV2Actuator();

framework/src/test/java/org/tron/core/db/AccountAssetStoreTest.java

@@ -84,11 +84,7 @@ private long createAsset(String tokenName) {
     AssetIssueCapsule assetIssueCapsule = new AssetIssueCapsule(assetIssueContract);
     chainBaseManager.getAssetIssueV2Store()
             .put(assetIssueCapsule.createDbV2Key(), assetIssueCapsule);
-    try {
-      ownerCapsule.addAssetV2(ByteArray.fromString(String.valueOf(id)), TOTAL_SUPPLY);
-    } catch (Exception e) {
-      Assert.fail(e.getMessage());
-    }
+    ownerCapsule.addAssetV2(ByteArray.fromString(String.valueOf(id)), TOTAL_SUPPLY);
     accountStore.put(ownerCapsule.getAddress().toByteArray(), ownerCapsule);
     return id;
   }

framework/src/test/java/org/tron/core/net/messagehandler/FetchInvDataMsgHandlerTest.java

@@ -111,23 +111,17 @@ public void testSyncFetchCheck() {
 
     FetchInvDataMsgHandler fetchInvDataMsgHandler = new FetchInvDataMsgHandler();
 
-    try {
-      Mockito.when(peer.getLastSyncBlockId())
+    Mockito.when(peer.getLastSyncBlockId())
         .thenReturn(new BlockCapsule.BlockId(Sha256Hash.ZERO_HASH, 1000L));
-      fetchInvDataMsgHandler.processMessage(peer, msg);
-      Assert.fail("Expected exception was not thrown: maxBlockNum: 1000, blockNum: 10000");
-    } catch (Exception e) {
-      Assert.assertEquals("maxBlockNum: 1000, blockNum: 10000", e.getMessage());
-    }
+    Exception e1 = Assert.assertThrows(Exception.class,
+        () -> fetchInvDataMsgHandler.processMessage(peer, msg));
+    Assert.assertEquals("maxBlockNum: 1000, blockNum: 10000", e1.getMessage());
 
-    try {
-      Mockito.when(peer.getLastSyncBlockId())
+    Mockito.when(peer.getLastSyncBlockId())
         .thenReturn(new BlockCapsule.BlockId(Sha256Hash.ZERO_HASH, 20000L));
-      fetchInvDataMsgHandler.processMessage(peer, msg);
-      Assert.fail("Expected exception was not thrown: minBlockNum: 16000, blockNum: 10000");
-    } catch (Exception e) {
-      Assert.assertEquals("minBlockNum: 16000, blockNum: 10000", e.getMessage());
-    }
+    Exception e2 = Assert.assertThrows(Exception.class,
+        () -> fetchInvDataMsgHandler.processMessage(peer, msg));
+    Assert.assertEquals("minBlockNum: 16000, blockNum: 10000", e2.getMessage());
   }
 
   @Test