public async Task GetCorrectedGravityAsync_ShouldReturnApproximate(decimal sg, decimal temp, decimal expected)
{
// Arrange
var service = this.CreateService();
var specificGravity = SpecificGravity.FromGravity(sg);
var temperature = temp;
// Act
var result = await service.GetCorrectedGravityAsync(
specificGravity,
temperature);
// Assert
result.Value.Should().BeApproximately(expected, 0.0005m);
}
public SpecificGravity GetCorrectedGravity(SpecificGravity specificGravity, decimal temperature)
{
var calibrationTemperature = 20.0m;
var farenheightTemperature = (temperature * 9 / 5) + 32;
var farenheightCalibrationTemperature = (calibrationTemperature * 9 / 5) + 32;
var correctedGravity =
specificGravity.Value
* (1.00130346m
- (0.000134722124m * farenheightTemperature)
+ (0.00000204052596m * farenheightTemperature.ToPowerOf(2))
- (0.00000000232820948m * farenheightTemperature.ToPowerOf(3)))
/ (1.00130346m
- (0.000134722124m * farenheightCalibrationTemperature)
+ (0.00000204052596m * farenheightCalibrationTemperature.ToPowerOf(2))
- (0.00000000232820948m * farenheightCalibrationTemperature.ToPowerOf(3)));
return(SpecificGravity.FromGravity(correctedGravity));
}