public void SecondTermNegativeResolution_PerformedCorrectly()
{
var equation = "1+1";
var input = new List <string>()
{
"1",
"+",
"-",
"1"
};
A.CallTo(() => _mathsRuleResolver.Operator).Returns("+");
A.CallTo(() => _mathsRuleResolver.SecondTermNegativeResolution(input, 1)).Returns("2");
A.CallTo(() => _equationPartsIdentifier.FindParts(equation)).Returns(input);
var response = _mathsResolver.ResolveSection(equation);
response.Should().Be("+2");
A.CallTo(() => _equationPartsIdentifier.FindParts(equation)).MustHaveHappened();
A.CallTo(() => _mathsRuleResolver.SecondTermNegativeResolution(input, 1)).MustHaveHappened();
}
private List <string> ResolveGeneric(List <string> equationList, IMathsRuleResolver mathsRuleResolver)
{
while (equationList.Contains(mathsRuleResolver.Operator))
{
var i = 0;
while (i < equationList.Count)
{
if (equationList[i] == mathsRuleResolver.Operator)
{
if (FirstTermIsNegative(equationList, i) && SecondTermIsNegative(equationList, i))
{
equationList[i - 2] = PrependPosSign(mathsRuleResolver.BothNegativeResolution(equationList, i));
equationList.RemoveRange(i - 1, 4);
}
else if (FirstTermIsNegative(equationList, i))
{
equationList[i - 2] = PrependPosSign(mathsRuleResolver.FirstTermNegativeResolution(equationList, i));
equationList.RemoveRange(i - 1, 3);
}
else if (SecondTermIsNegative(equationList, i))
{
equationList[i - 1] = PrependPosSign(mathsRuleResolver.SecondTermNegativeResolution(equationList, i));
equationList.RemoveRange(i, 3);
}
else if (i == 0)
{
equationList[i] = PrependPosSign(mathsRuleResolver.BothPositiveResolution(equationList, i));
equationList.RemoveRange(i + 1, 1);
}
else
{
equationList[i - 1] = PrependPosSign(mathsRuleResolver.BothPositiveResolution(equationList, i));
equationList.RemoveRange(i, 2);
}
i = equationList.Count;
}
i++;
}
}
return(equationList);
}