Grails unit testing
- 1. Grails Unit Testing By:- Uday & Imran
- 4. Goals of Unit Testing
- 6. Writing Unit test cases
- 7. Demo
- 8. Exercise
- 9. What do we test ? What a program is supposed to do == What the program actually does
- 10. Motivation People are not perfect We make errors in design and code Testing is an investment Over the time the tests build, the early investment in writing test cases pays dividends later as the size of the application grows.
- 11. A way of thinking Designing and coding are creative
- 12. Testing is destructive.The primary goal is to break the software
- 13. Very often the same person does coding and testing
- 14. Need 'split personality': when you start testing, become paranoid and malicious. Surprisingly hard to do: people don't like finding out that they make mistakes.
- 15. We have more code base to handle
- 16. Testing Testing is a process of executing software with the intent of finding errors.
- 17. Good Testing has high probability of finding as-yet-undiscovered errors
- 18. Successful Testing discovers errors If it did not find any errors, need to ask whether our testing approach is good or not
- 19. Testing needs to be the integral part at each level of development Unit testing (white box)
- 20. Integration testing (white box)
- 21. Functional testing (black box)
- 23. Understanding Unit Testing Unit testing is a method by which individual units of source code are tested to determine if they are fit for use.
- 24. A unit is the smallest testable part of an application.
- 25. Each test case is independent from the others: substitutes like method stubs, mock objects, can be used to assist testing a module in isolation.
- 26. A unit test provides a strict, written contract that the piece of code must satisfy.
- 27. It tests individual methods or blocks of code without considering for surrounding infrastructure.
- 28. It is integral part of the development, so developers write unit test cases.
- 29. Shortcomings of Unit Testing Test cases ‐written to suit programmer’s implementation (not necessarily specification)
- 30. The actual database or external file is never tested directly by TDD.
- 31. It is highly reliant on Refactoring and Programmer skills
- 32. Not every code is testable.
- 33. Advantages of Unit Testing Facilitates change
- 34. Unit testing allows the programmer to refactor code at a later date, and make sure the module still works correctly
- 36. Unit testing may reduce uncertainty in the units themselves and can be used in a bottom-up testing style approach.By testing the parts of a program first and then testing the sum of its parts, integration testing becomes much easier.
- 37. Documentation
- 38. Unit testing provides a sort of living documentation of the system
- 39. Design
- 40. When software is developed using a test-driven approach, the unit test may take the place of formal design. Each unit test can be seen as a design element specifying classes, methods, and observable behaviour.
- 41. Quality Improves the quality, readability and testability of the code
- 42. Spock A developer testing framework for Java and Groovy application
- 43. Based on Groovy
- 44. What makes it stand out from the crowd is its beautiful and highly expressive specification language
- 45. Getting started Basic Terms used in Spock
- 46. Fields Field: store objects belonging to the specification's fixture def obj = new ClassUnderSpecification()
- 48. static final PI = 3.141592654
- 49. Fixture Methods def setup() {} // run before every feature method
- 50. def cleanup() {} // run after every feature method
- 51. def setupSpec() {} // run before the first feature method
- 52. def cleanupSpec() {} // run after the last feature method
- 53. Feature methods def "pushing an element on the stack"() { // blocks go here }
- 55. when, then, (always occure togethor) when:(stimulus)
- 56. then: (response) expect: useful in situations where it is more natural to describe stimulus and expected response in a single expression
- 57. Example when: stack.push(elem) then: !stack.empty stack.size() == 1 stack.peek() == elem
- 58. Example when: def x = Math.max(1, 2) then: x == 2 expect: Math.max(1, 2) == 2
- 59. Where (for data driven testing) data-driven feature methods
- 60. where block always comes last in a method expect: Math.max(a, b) == c where: [a,b,c] << [[1,2,2],[3,7,7]]
- 61. Exception conditions when: emptyStack.pop() then: thrown(EmptyStackException) emptyStack.empty
- 62. def "testing exception is not thrown"() { when: //something that does'nt throw an exception then: notThrown(NullPointerException) }
- 63. More annotations @Timeout @Ignore @IgnoreRest @FailsWith
- 64. Unit testing in grails context simple an quick to run
- 66. doesn't load supporting components
- 67. doesn't spin up the whole Grails environment
- 68. dynamic methods and properties are not available
- 70. ...contd All unit test case files extend UnitSpec
- 71. All controller unit test case file extend ControllerSpec
- 72. All taglib tests files extend TaglibSpec
- 73. All integration test files extend IntegrationSpec
- 74. All integration test files for gsp extend GroovyPagesSpec
- 75. Specification is the super class of all
- 76. class MyService { public String myFunction() { return "testString" } } Test Case def “test my simple function”() { setup: def myService = new MyService() when: String string = myService.myFunction() then: string=="testString" }
- 79. mockConfig()
- 81. mockLogging()
- 82. mockDomain() adds the persistence methods back onto the domain class
- 83. Injected methods mockDomain() gives us
- 84. All of your dynamic finders (findBy* and findAllBy* )
- 85. get(), getAll(), exists(), count(), list(), create(), save(), validate(), delete(), discard(), addTo(), removeFrom()
- 86. Injected methods that aren’t included:
- 87. countBy(), createCriteria(), executeQuery(), executeUpdate(), find(), findAll(), findAllWhere(), findWhere(), ident(), listOrderBy(), merge(), withCriteria(), withTransaction()
- 88. Contd... def instances = [] mockDomain(MyDomain, instances) MyDomain object = new MyDomain(name: 'name') object.save()
- 89. Mock() It can be used to mock any class you want
- 90. Returns an object of the class
- 91. MyService myService = Mock()
- 94. public void myFunction(int number, String name){ MyDomainClass object = new MyDomainClass(age: number, name: name) object.save() } Test Case def “test if my domain object is saved” () { def instances = [] mockDomain(MyDomainClass) def myService = new MyService() myService.myFunction(30, 'myName') MyDomain.count()==1 } Test saving an object
- 95. MockConfig() This is used for mocking Config properties void savePerson(String name) {
- 96. Person person = new Person()
- 99. person.save()
- 100. }
- 101. Contd... def “test my function”() { Setup: mockDomain(Person) mockConfig(''' bank{ accountNumber = '1234567' } ''') when: def personService = new PersonService() personService.savePerson(“Name”) then: Person.count()==1 }
- 102. Contd... def “only user with valid name passes the constraint”() { setup: mockForConstraintsTests(User) when: def user = new User(name:"", login:"admin", password:"pass") user.validate() then: user.errors.errorCount==1 user.errors["name"]=="blank" }
- 103. MockLogging() Used to access the log property void getEmployeeAddresses() { def anyText = "hello world" log.debug anyText } Test
- 104. def “test my method which uses logging”() {
- 106. //
- 107. }
- 108. Function with dependencies public void myFunction(String empId) { String name = otherService.someOtherFunction(empId) MyDomainClass object = new MyDomainClass(name: name) object.save() } Test Case
- 109. def “test my function with dependency on other service”() { setup: OtherService otherService = Mock(OtherService) otherService.someOtherFunction(1001) >> "testName" def myService = new MyService() myService.otherService = otherService when: String string = myService.myFunction( 'myName') then: instances.size()==1 }
- 110. ControllerSpec readymade goodies mockRequest
- 111. mockResponse
- 112. mockSession
- 113. forwardArgs
- 114. redirectArgs
- 115. renderArgs
- 116. mockParams
- 117. Code def commit = { BankFile bankFile = BankFile.get(params.id) try { bankFileService.commit(bankFile, params.comments) flash.message = "Bank File has been committed" } catch (BankFileCommitException e) { flash.message = "Bank File commit failed: ${e.message}" redirect(action: show, id: bankFile.id) }
- 118. Test Def “test my simple action ”() { Setup: mockDomain(BankFile, [new BankFile(id: 1)]) BankFileService serviceMock = Mock() serviceMock.commit(params) >> new BankFile(id: 1) } controller.bankFileService = serviceMock when: mockParams.id = 1 controller.commit() then: redirectArgs.action==”show” redirectArgs.id==1 }
- 119. Spock in grails context renderArgs.model.book==book // For testing model parameters renderArgs.view=='show' // For testing view renderArgs.template=='show' // For testing template
- 120. Spock in grails context Mocking Response mockResponse.contentAsString=='success' mockResponse.contentAsByteArray == bytes mockResponse.contentType = "image/gif" Mocking Request Cookie cookie = new Cookie("A", "ABCD") mockRequest.cookies = [cookie].toArray()
- 121. Questions???
- 125. http://code.google.com/p/spock/wiki/SpockBasics
- 126. http://code.google.com/p/spock/wiki/Interactions
- 130. Thanks (Testing is like walking everybody knows its good but nobody does it)