public void should_return_lowest_index_above_value_for_first_and_intermidiate_elements()
{
SortedDictionary <double, double> collection = new SortedDictionary <double, double>
{
{ 0.25, 1 },
{ 0.5, 3 },
{ 0.75, 4 },
{ 1, 9 },
{ 1.25, 10 },
{ 1.5, 16 },
{ 2, 18 },
{ 3, 21 },
{ 4, 34 },
{ 5, 18 },
{ 6, 21 },
{ 7, 34 },
{ 8, 18 },
{ 9, 21 },
{ 10, 34 }
};
double val1 = 0.26;
double val2 = 0.37;
double val3 = 2.12;
double val4 = 9.25;
double ind1 = Tools.FindLowestIndexAbove(collection, val1);
double ind2 = Tools.FindLowestIndexAbove(collection, val2);
double ind3 = Tools.FindLowestIndexAbove(collection, val3);
double ind4 = Tools.FindLowestIndexAbove(collection, val4);
Assert.IsTrue(ind1.Equals(1) && ind2.Equals(1) && ind3.Equals(7) && ind4.Equals(14));
}