Presentation Transcript

1. - Behaviour Driven Development- Visual Studio 2010- SpecFlow

   Ivan Pavlović, Hive Studios Visual C# MVP, MCT, CSM paki@hive-studios.com http://msforge.net/blogs/paki http://twitter.com/ipavlovi
2. Agenda A little bit of slides and a lot of examples What is BDD Language Tools Examples
3. Basic Test Types Unit testing Acceptance / Customer testing Integration testing Performance testing Regression testing
4. BehaviourDrivenDevelopment One of agile tehniques 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 (http://dannorth.net/)
5. Gherkin DomainSpecificLanguage Razumljiv je poslovnimkorisnicima Simple syntax Feature Background Scenario, Scenario Outline Given,When, Then Localized to 35+ languages https://github.com/aslakhellesoy/cucumber/wiki/gherkin
6. 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: ...
7. 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
8. Tools Tools are file generators that consumes *.feature files and creates test fixtures Cucumber – Ruby, http://cukes.info/ SpecFlow– .NET, http://specflow.org Nunit, MSTest, MBUnit… …and many others
9. How it works BAor user writes a feature and scenarios and agree with dev that it is doable SpecFlowgenerates one test per scenario Developer implements step definitions Developer writes just enough code to make tests green Move on to the next scenario
10. Step Definition Mapping … 7: Given some precondition 8: And some other precondition 9: When some action by the actor 10: Thensome testable outcome is achieved [Given(@„some precondition")] public void SomePrecondition() { … do something… } [Given(@„some other precondition")] public void SomePrecondition() { … do something… } [When(@„some action by the actor")] public void SomePrecondition() { … do something… } [Then(@”some verifiable result”)] Public void VerifyResult() { … do assert… } Test Run
11. Arguments - RegEx … 7: GivenI have 5 apples 8: AndI eat 2 of them 9: Whensomeone asks how many apples I do have 10: Then I should answer “3 apples” [Given(@„I have (.*) apples")] public void SomePrecondition(intnumberOfApples) { … do something… } [Given(@„ I eat (.*) of them")] public void SomePrecondition(intnumberOfEatenApples) { … do something… } [When(@„ someone asks how many apples I do have")] public void SomePrecondition() { … do something… } [Then(@” I should answer \“(.*) apples\””)] Public void VerifyResult(int expected) { … do assert of expected … }
12. Table-like Parameters Scenario: Posting a validentry Given I am on the postingpage And I havefilledout the form as follows | Label | Value | | Yourname | Jakob | | Yourcomment | Das ist gut! | When I click the buttonlabelled "Post" Then I should be on the guestbookpage Andthe guestbookentriesincludes the following | Name | Comment | Posted date | | Jakob | Das ist gut! | (within last minute) | [Given(@"I havefilledout the form as follows")] publicvoidFillFormAsFollows(TechTalk.SpecFlow.Tabletable) { foreach(var row in table.Rows) { ….. Do something … } }
13. 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
14. Scenario outline Scenario Outline: TC5Given I have entered <x> into the calculatorAnd I have entered <y> into the calculatorWhen I press addThen the result should be <result> on the screenScenarios: addition| x | y | result|| 1 | 2 | 3 || 2 | 2 | 4 | | 3 | -3 | 0 |
15. What to Put into Step Definitions It is your call Depend on what you want to test PublicInterfaces / Components WebUIusingbrowserautomation WatiN, Selenium WebUIusingRequest/Respons Http Get/Post Win UI usingautomation White / Windows UI Automation
16. Resources Specflow http://specflow.org Gherkin https://github.com/aslakhellesoy/cucumber/wiki/gherkin White http://white.codeplex.com/ WatiN http://watiN.sourceforge.net
17. MSForge.NET