test(toolkit): strengthen history assertion with actual-content check

Author: halibobo1205

plugins/src/test/java/org/tron/plugins/DbLiteTest.java

@@ -14,6 +14,7 @@
 import org.junit.After;
 import org.junit.Rule;
 import org.junit.rules.TemporaryFolder;
+import org.rocksdb.RocksDBException;
 import org.tron.api.WalletGrpc;
 import org.tron.common.application.Application;
 import org.tron.common.application.ApplicationFactory;
@@ -26,6 +27,9 @@
 import org.tron.common.utils.Utils;
 import org.tron.core.config.DefaultConfig;
 import org.tron.core.config.args.Args;
+import org.tron.plugins.utils.db.DBInterface;
+import org.tron.plugins.utils.db.DBIterator;
+import org.tron.plugins.utils.db.DbTool;
 import picocli.CommandLine;
 
 @Slf4j
@@ -141,6 +145,10 @@ public void testTools(String dbType, int checkpointVersion, boolean advanceSnaps
     Path historyDir = Paths.get(dbPath, "history");
     assertTrue(historyDir.resolve("balance-trace").toFile().exists());
     assertTrue(historyDir.resolve("account-trace").toFile().exists());
+    if (historyBalanceLookup) {
+      assertDbHasEntries(historyDir, "balance-trace");
+      assertDbHasEntries(historyDir, "account-trace");
+    }
     // backup original database to database_bak
     File database = new File(Paths.get(dbPath, databaseDir).toString());
     if (!database.renameTo(new File(Paths.get(dbPath, databaseDir + "_bak").toString()))) {
@@ -169,6 +177,18 @@ public void testTools(String dbType, int checkpointVersion, boolean advanceSnaps
     DbLite.reSetRecentBlks();
   }
 
+  private static void assertDbHasEntries(Path parent, String dbName) {
+    try {
+      DBInterface db = DbTool.getDB(parent.toString(), dbName);
+      try (DBIterator it = db.iterator()) {
+        it.seekToFirst();
+        assertTrue(dbName + " should have at least one entry", it.hasNext());
+      }
+    } catch (IOException | RocksDBException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
   private void generateSomeTransactions(int during) {
     during *= 1000; // ms
     int runTime = 0;