/**
   * Validates that validateTransactionUnitsGreaterThanZero returns false when transaction units is
   * zero.
   */
  public void testTransactionUnitsPositive_False() {

    EndowmentTransactionLine endowmentTargetTransactionLine =
        EndowmentTransactionLineFixture.ENDOWMENT_TRANSACTIONAL_LINE_ZERO_UNITS
            .createEndowmentTransactionLine(false);

    assertFalse(
        rule.validateTransactionUnitsGreaterThanZero(
            endowmentTargetTransactionLine,
            rule.getErrorPrefix(endowmentTargetTransactionLine, -1)));
  }