code: public static void assertInserted(String message, DataSet dataSet) throws DBAssertionError {
      DBAssert.deltaAssertion(CallInfo.create(message), empty(dataSet.getSource()), dataSet);
    }
docs: Assert that database changed only by insertion of a given
  data set (error message variant).
  
  @param message Assertion error message.
  @param dataSet Data set.
  @throws DBAssertionError if the assertion fails.
  @see #assertUnchanged(DataSource)
  @see #assertDeleted(DataSet)
  @see #assertDelta(DataSet,DataSet)