BDD

Behaviour Driven Development

Desenvolvimento Guiado por

Especificações Comportamentais

BDD x TDD

BDD ~~ TDD

troca de ”testes” por ”comportamentos”

BDD = TDD

+ fluência

+ linguagem ubíqua

+ Modelo do Domínio

BDD - Estórias Estórias

1: [Test]

2: public void Transfer_to_cash_account()

3: {

4:

5: Account savings = null;

6: Account cash = null;

8: Story transferStory = new Story("Transfer to cash account");

10: transferStory

11: .AsA("savings account holder")

12: .IWant("to transfer money from my savings account")

13: .SoThat("I can get cash easily from an ATM");

BDD - Estórias

15: transferStory 16: .WithScenario("Savings account is in credit") 18: .Given("my savings account balance is", 100, delegate(int accountBalance) { savings = new Account(accountBalance); })19: .And("my cash account balance is", 10, delegate(int accountBalance) { cash = new Account(accountBalance); })20: .When("I transfer to cash account", 20, delegate(int transferAmount){savings.TransferTo(cash,transferAmount);})21: .Then("my savings account balance should be", 80, delegate(int expectedBalance) { Assert.AreEqual(expectedBalance, savings.Balance); })22: .And("my cash account balance should be", 30, delegate(int expectedBalance) { Assert.AreEqual(expectedBalance, cash.Balance); })23:

BDD - Estórias e Cenários

Estórias

transferStory

32: .WithScenario("Savings account is overdrawn")

33:

34: .Given("my savings account balance is", -20)

35: .And("my cash account balance is", 10)

36: .When("I transfer to cash account", 20)

37: .Then("my savings account balance should be", -20)

38: .And("my cash account balance should be", 10);

39:

40: }