public void ShouldThrowCalculationException_OnCalculate_IfCalculatorCannotCalculate()
{
// arrange
var calculator = new DistanceFailureCalculatorStub();
var unitService = new UnitServiceStub();
var service = new DistanceService(new IDistanceCalculator[] { calculator }, unitService);
var c1 = new Coordinate {
Longitude = 0, Latitude = 0
};
var c2 = new Coordinate {
Longitude = 1, Latitude = 1
};
// act and arrange
Assert.Throws <CalculationException>(() => service.Calculate(c1, c2));
}
public void ShouldNotFail_OnCalculate_IfValidCalculatorExists()
{
// arrange
var calculator1 = new DistanceFailureCalculatorStub();
var calculator2 = new DistanceSuccessCalculatorStub();
var unitService = new UnitServiceStub();
var service = new DistanceService(new IDistanceCalculator[] { calculator1, calculator2 }, unitService);
var c1 = new Coordinate {
Longitude = 0, Latitude = 0
};
var c2 = new Coordinate {
Longitude = 1, Latitude = 1
};
// act
var value = service.Calculate(c1, c2);
// assert
Assert.NotNull(value);
Assert.Equal(Units.Meters, value.Units);
Assert.Equal(10, value.Value);
}