Tutorial – BDD and Dependency Injection in .Net (4)

As usual we are picking up from where we left off. In this brief post we will expand our SpecFlow knowledge by focusing on parameterised the step definitions.

Currently the SpecFlow tests are as follows:

PlayRoundFeature.feature

Feature: Play a single round of Rock Paper Scissors
	As a player
	I want to play a round
	So that I can test my luck

Scenario: Computer chooses rock and the player chooses paper
	Given the computer makes a secret choice of rock
	When I choose paper
	Then the result should be “Player Wins!”

Scenario: Computer chooses rock and the player chooses scissors
	Given the computer makes a secret choice of rock
	When I choose scissors
	Then the result should be “Computer Wins!”

PlayRoundSteps.cs

namespace RockPaperScissorsTest.Specs.Steps
{
    [Binding]
    public class PlayRoundSteps
    {
        private const string GameKey = "Game";

        [Given(@"the computer makes a secret choice of rock")]
        public void GivenTheComputerMakesASecretChoiceOfRock()
        {
            var game = new Game(new DescissionEngine());
            ScenarioContext.Current.Add(GameKey, game);
        }

        [When(@"I choose paper")]
        public void WhenIChoosePaper()
        {
            var game = ScenarioContext.Current.Get(GameKey);
            game.PlayerMove = "Paper";
        }

        [When(@"I choose scissors")]
        public void WhenIChooseScissors()
        {
            var game = ScenarioContext.Current.Get(GameKey);
            game.PlayerMove = "Scissors";
        }

        [Then(@"the result should be “Player Wins!”")]
        public void ThenTheResultShouldBePlayerWins()
        {
            var game = ScenarioContext.Current.Get(GameKey);
            Assert.AreEqual("Player Wins!", game.Result());
        }

        [Then(@"the result should be “Computer Wins!”")]
        public void ThenTheResultShouldBeComputerWins()
        {
            var game = ScenarioContext.Current.Get(GameKey);
            Assert.AreEqual("Computer Wins!", game.Result());
        }

    }
}

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