BDD for C# NUnit
- by mjezzi
I've been using a home brewed BDD Spec extension for writing BDD style tests in NUnit, and I wanted to see what everyone thought. Does it add value? Does is suck? If so why? Is there something better out there?
Here's the source:
https://github.com/mjezzi/NSpec
There are two reasons I created this
To make my tests easy to read.
To produce a plain english output to
review specs.
Here's an example of how a test will look:
-since zombies seem to be popular these days..
Given a Zombie, Peson, and IWeapon:
namespace Project.Tests.PersonVsZombie
{
public class Zombie
{
}
public interface IWeapon
{
void UseAgainst( Zombie zombie );
}
public class Person
{
private IWeapon _weapon;
public bool IsStillAlive { get; set; }
public Person( IWeapon weapon )
{
IsStillAlive = true;
_weapon = weapon;
}
public void Attack( Zombie zombie )
{
if( _weapon != null )
_weapon.UseAgainst( zombie );
else
IsStillAlive = false;
}
}
}
And the NSpec styled tests:
public class PersonAttacksZombieTests
{
[Test]
public void When_a_person_with_a_weapon_attacks_a_zombie()
{
var zombie = new Zombie();
var weaponMock = new Mock<IWeapon>();
var person = new Person( weaponMock.Object );
person.Attack( zombie );
"It should use the weapon against the zombie".ProveBy( spec =>
weaponMock.Verify( x => x.UseAgainst( zombie ), spec ) );
"It should keep the person alive".ProveBy( spec =>
Assert.That( person.IsStillAlive, Is.True, spec ) );
}
[Test]
public void When_a_person_without_a_weapon_attacks_a_zombie()
{
var zombie = new Zombie();
var person = new Person( null );
person.Attack( zombie );
"It should cause the person to die".ProveBy( spec =>
Assert.That( person.IsStillAlive, Is.False, spec ) );
}
}
You'll get the Spec output in the output window:
[PersonVsZombie]
- PersonAttacksZombieTests
When a person with a weapon attacks a zombie
It should use the weapon against the zombie
It should keep the person alive
When a person without a weapon attacks a zombie
It should cause the person to die
2 passed, 0 failed, 0 skipped, took 0.39 seconds (NUnit 2.5.5).
