public void GetAirSpeed_NotNailed_NorwegianBlueParrot_should_return_expectedSpeed(int voltage, int expectedSpeed)
{
// Arrange
var sut = new BirdProperties()
{
Type = "NorwegianBlueParrot", Voltage = voltage, IsNailed = false
};
// Act
var outcome = new FlightCalculator().GetAirSpeed(sut);
// Assert
outcome.Should().Be(expectedSpeed);
}
public void GetAirSpeed_AfricanSwallow_should_return_expectedSpeed(int numberOfCoconuts, int expectedSpeed)
{
// Arrange
var sut = new BirdProperties()
{
Type = "AfricanSwallow", NumberOfCoconuts = numberOfCoconuts
};
// Act
var outcome = new FlightCalculator().GetAirSpeed(sut);
// Assert
outcome.Should().Be(expectedSpeed);
}
public void GetAirSpeed_EuropeanSwallow_should_return_35()
{
// Arrange
const int expected = 35;
var sut = new BirdProperties()
{
Type = "EuropeanSwallow"
};
// Act
var outcome = new FlightCalculator().GetAirSpeed(sut);
// Assert
outcome.Should().Be(expected);
}
public void GetAirSpeed_Unknown_type_should_return_0(string type)
{
// Arrange
const int expected = 0;
var sut = new BirdProperties()
{
Type = type
};
// Act
var outcome = new FlightCalculator().GetAirSpeed(sut);
// Assert
outcome.Should().Be(expected);
}
public void GetAirSpeed_Nailed_NorwegianBlueParrot_should_return_0()
{
// Arrange
const int expected = 0;
var sut = new BirdProperties()
{
Type = "NorwegianBlueParrot", IsNailed = true
};
// Act
var outcome = new FlightCalculator().GetAirSpeed(sut);
// Assert
outcome.Should().Be(expected);
}
/*
* 1. Create factory function
* 2. Move conditional code to superclass
* 3. Take a subclass, create override
* 4. Repeat for every conditional
* 5. Adjust function is superclass (consider making superclass abstract)
*/
public int GetAirSpeed(BirdProperties properties)
{
switch (properties.Type)
{
case "EuropeanSwallow":
return(35);
case "AfricanSwallow":
return(40 - 2 * properties.NumberOfCoconuts);
case "NorwegianBlueParrot":
return(properties.IsNailed ? 0 : 10 + properties.Voltage / 10);
default:
return(0);
}
}