public static void ProcessBMI(Func <string, double> input, Action <BmiRange> output)
{
var height = input("height");
var weight = input("weight");
BmiRange result = CalculateBMI(height, weight);
output(result);
}
public void CalculateBMI_ShouldReturnTheExpectedResult()
{ //Arrange
double height = 1.86;
double weight = 85;
//Act
BmiRange result = CalculateBMI(height, weight);
//Assert
Assert.Equal(expected: BmiRange.Healthy, actual: result);
}
public void HOF_ProcessBMI_ShouldBeProvidedWithImpureFunctionsForIO(double height, double weight, BmiRange expected)
{
//Arrange
BmiRange result = default;
Func <string, double> input = (str) => str == "height" ? height : weight;
Action <BmiRange> output = (str) => result = str;
//Act
ProcessBMI(input, output);
//Assert
Assert.Equal(expected: expected, actual: result);
}
private static void Write(BmiRange bmiRange)
=> WriteLine($"Based on your BMI, you are {bmiRange}");
