@VisibleForTesting
  Object evaluate(final GenericRow row) {
    return term.getValue(new TermEvaluationContext(row));
  }
@Test
  public void shouldEvaluateArithmetic() {
    // Given:
    final Expression expression1 = new ArithmeticBinaryExpression(
        Operator.ADD, new IntegerLiteral(1), new IntegerLiteral(2)
    );
    final Expression expression2 = new ArithmeticBinaryExpression(
        Operator.ADD, new IntegerLiteral(1), new LongLiteral(4)
    );
    final Expression expression3 = new ArithmeticBinaryExpression(
        Operator.ADD, new DoubleLiteral(5.5), new LongLiteral(4)
    );
    final Expression expression4 = new ArithmeticBinaryExpression(
        Operator.MULTIPLY, new IntegerLiteral(5), new LongLiteral(4)
    );
    final Expression expression5 = new ArithmeticBinaryExpression(
        Operator.DIVIDE, new LongLiteral(18), new LongLiteral(3)
    );
    final Expression expression6 = new ArithmeticBinaryExpression(
        Operator.MODULUS, new LongLiteral(20), new LongLiteral(3)
    );
    final Expression expression7 = new ArithmeticBinaryExpression(
        Operator.ADD, new DecimalLiteral(new BigDecimal("12.5").setScale(2)),
        new DecimalLiteral(new BigDecimal("1.25").setScale(2))
    );
    final Expression expression8 = new ArithmeticBinaryExpression(
        Operator.ADD, new DecimalLiteral(new BigDecimal("12.5").setScale(2)),
        new DoubleLiteral(2.0d)
    );

    // When:
    InterpretedExpression interpreter1 = interpreter(expression1);
    InterpretedExpression interpreter2 = interpreter(expression2);
    InterpretedExpression interpreter3 = interpreter(expression3);
    InterpretedExpression interpreter4 = interpreter(expression4);
    InterpretedExpression interpreter5 = interpreter(expression5);
    InterpretedExpression interpreter6 = interpreter(expression6);
    InterpretedExpression interpreter7 = interpreter(expression7);
    InterpretedExpression interpreter8 = interpreter(expression8);


    // Then:
    assertThat(interpreter1.evaluate(ROW), is(3));
    assertThat(interpreter2.evaluate(ROW), is(5L));
    assertThat(interpreter3.evaluate(ROW), is(9.5d));
    assertThat(interpreter4.evaluate(ROW), is(20L));
    assertThat(interpreter5.evaluate(ROW), is(6L));
    assertThat(interpreter6.evaluate(ROW), is(2L));
    assertThat(interpreter7.evaluate(ROW), is(BigDecimal.valueOf(13.75).setScale(2)));
    assertThat(interpreter8.evaluate(ROW), is(14.5d));
  }