© Hive Studios 2011 Behaviour Driven Development Visual Studio 2010 & SpecFlow Ivan Pavlović, Hive Studios Visual C# MVP, Certified ScrumMaster

© Hive Studios 2011 Agenda A little bit of slides and a lot of examples What is BDD Language Tools Examples

© Hive Studios 2011 Basic Test Types Unit testing Acceptance / Customer testing Integration testing Performance testing Regression testing

© Hive Studios 2011 Behaviour Driven Development One of agile techniques Improves communication between developers and domain experst Example driven specification BDD is a second-generation, outside-in, pull-based, multiple-stakeholder, multiple-scale, high-automation, agile methodology. It describes a cycle of interactions with well-defined outputs, resulting in the delivery of working, tested software that matters. - Dan North (

© Hive Studios 2011 Gherkin (kornišon) Domain Specific Language Natural human language Simple syntax – Feature – Background – Scenario, Scenario Outline – Given, When, Then Localized to 35+ languages

© Hive Studios 2011 Example 1: Feature: Some descriptive text of what is desired 2: In order to realize a named business value 3: As an explicit system actor 4: I want to gain some beneficial outcome which furthers the goal 5: 6: Scenario: Some determinable business situation 7: Given some precondition 8: And some other precondition 9: When some action by the actor 10: And some other action 11: And yet another action 12: Then some testable outcome is achieved 13: And something else we can check happens too 14: 15: Scenario: A different situation 16:...

© Hive Studios 2011 Real example Feature: Serve coffee In order to earn money Customers should be able to buy coffee at all times Scenario: Buy last coffee Given there are 1 coffees left in the machine And I have deposited 1$ When I press the coffee button Then I should be served a coffee

© Hive Studios 2011 Tools Tools are file generators that consumes *.feature files and creates test fixtures Cucumber – Ruby, SpecFlow –.NET, – Nunit, MSTest, MBUnit… …and many others

© Hive Studios 2011 How it works 1.BA or user writes a feature and scenarios and agree with dev that it is doable 2.SpecFlow generates one test per scenario 3.Developer implements step definitions 4.Developer writes just enough code to make tests green 5.Move on to the next scenario

© Hive Studios 2011 Step Definition Mapping … 7: Given some precondition 8: And some other precondition 9: When some action by the actor 10: Then some testable outcome is achieved precondition")] public void SomePrecondition() { … do something… } other precondition")] public void SomePrecondition() { … do something… } action by the actor")] public void SomePrecondition() { … do something… } verifiable result”)] Public void VerifyResult() { … do assert… }

© Hive Studios 2011

Arguments - RegEx … 7: Given I have 5 apples 8: And I eat 2 of them 9: When someone asks how many apples I do have 10: Then I should answer “3 apples” have (.*) apples")] public void SomePrecondition(int numberOfApples) { … do something… } I eat (.*) of them")] public void SomePrecondition(int numberOfEatenApples) { … do something… } someone asks how many apples I do have")] public void SomePrecondition() { … do something… } I should answer \“(.*) apples\””)] Public void VerifyResult(int expected) { … do assert of expected … }

© Hive Studios 2011

Table-like Parameters Scenario: Posting a valid entry Given I am on the posting page And I have filled out the form as follows | Label | Value | | Your name | Jakob | | Your comment | Das ist gut! | When I click the button labelled "Post" Then I should be on the guestbook page And the guestbook entries includes the following | Name | Comment | Posted date | | Jakob | Das ist gut! | (within last minute) |

© Hive Studios 2011 Scenario outline Scenario: TC1 Add two numbers Given I have entered 1 into the calculator And I have entered 2 into the calculator When I press add Then the result should be 3 on the screen Scenario: TC2 Add two numbers Given I have entered 2 into the calculator And I have entered 2 into the calculator When I press add Then the result should be 4 on the screen

© Hive Studios 2011 Scenario outline Scenario Outline: TC5 Given I have entered into the calculator And I have entered into the calculator When I press add Then the result should be on the screen Scenarios: addition | x | y | result| | 1 | 2 | 3 | | 2 | 2 | 4 | | 3 | -3 | 0 |

© Hive Studios 2011

What to Put into Step Definitions It is your call Depend on what you want to test 1.Public Interfaces / Components 2.WebUI using browser automation WatiN, Selenium 3.WebUI using Request/Respons Http Get/Post 4.Win UI using automation White / Windows UI Automation

© Hive Studios 2011 Resources Specflow Gherkin White WatiN

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