@Test
  public void testGetTransactionImpl() throws Exception {
    utx.begin();
    Thread thread = Thread.currentThread();
    Transaction txn1 = (Transaction) tm.getTransactionMap().get(thread);
    Transaction txn2 = tm.getTransaction();
    assertTrue("GetTransactionImpl not returning the correct transaction", txn1 == txn2);
    utx.commit();
  }
Test TransactionManagerImpl methods not tested by UserTransactionImplTest
geode-core/src/integrationTest/java/org/apache/geode/internal/jta/TransactionManagerImplJUnitTest.java