@Test
public void testCreateFunctionDuplicate() throws Exception {

    Condition condition = new Condition();
    Expression f1 = new FunctionExpression("FLOOR", "com.hortonworks.streamline.Floor", ImmutableList.of(new Literal("100.5")));
    Expression f2 = new FunctionExpression("FLOOR", "com.hortonworks.streamline.Floor", ImmutableList.of(new Literal("2.5")));
    Expression expression1 = new BinaryExpression(Operator.GREATER_THAN,
                                                  new FieldExpression(Schema.Field.of("x", Schema.Type.INTEGER)), f1);
    Expression expression2 = new BinaryExpression(Operator.GREATER_THAN,
                                                  new FieldExpression(Schema.Field.of("x", Schema.Type.INTEGER)), f2);
    Expression expression = new BinaryExpression(Operator.AND, expression1, expression2);
    condition.setExpression(expression);
    stormSqlExpression = new StormSqlExpression(condition);
    assertEquals(Arrays.asList("CREATE FUNCTION FLOOR AS 'com.hortonworks.streamline.Floor'"),
                 stormSqlExpression.createFunctions());
}