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'''Test Fortran 2003 rule R706 : This file tests support for the
Level_2_Expr class.

'''

import pytest
from fparser.two.Fortran2003 import Level_2_Expr
from fparser.two.parser import ParserFactory
# This is required to setup the fortran2003 classes (when matching
# with Level_2_Expr directly)
_ = ParserFactory().create(std="f2003")


@pytest.mark.parametrize("string,str_repr", [
    ("a + c ** b", "Level_2_Expr(Name('a'), '+', Mult_Operand(Name('c'), '**',"
     " Name('b')))"),
    ("a + c * b", "Level_2_Expr(Name('a'), '+', Add_Operand(Name('c'), '*',"
     " Name('b')))"),
    ("a + 1.0E-10 * b", "Level_2_Expr(Name('a'), '+', Add_Operand("
     "Real_Literal_Constant('1.0E-10', None), '*', Name('b')))"),
    ("a + b * 1.0E-10", "Level_2_Expr(Name('a'), '+', Add_Operand("
     "Name('b'), '*', Real_Literal_Constant('1.0E-10', None)))"),
    ("a + 1.0d+10 * b", "Level_2_Expr(Name('a'), '+', Add_Operand("
     "Real_Literal_Constant('1.0D+10', None), '*', Name('b')))"),
    ("- .0E-10 * b - a", "Level_2_Expr(Level_2_Unary_Expr('-', Add_Operand("
     "Real_Literal_Constant('.0E-10', None), '*', Name('b'))), '-', "
     "Name('a'))")])
def test_level2_exprn(string, str_repr):
    ''' Test for a successful match with a valid level-2 expression. '''
    result = Level_2_Expr(string)
    assert str(result).lower() == string.lower()
    assert repr(result) == str_repr
