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NewTestRunner

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This is a first draft for an AccUnit TestRunner.
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[[en:NewTestRunner]]
[[Datei:AccUnit_TestRunner_Draft.jpg|480px]]
[[Datei:AccUnit_TestRunner_Draft.jpg|480px]]
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Details siehe [http://en.accunit.access-codelib.net/NewTestRunner englische Version]
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== Details ==
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(Gathered mainly as results of the discussion between Josef and Paul on Jan 13th, 2012)
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TO BE ORDERED AND REVIEWED
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=== Reponsibilites and Input/Output ===
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* '''TestManager'''
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** Responsibility: Orchestrates the parts described below
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** Responsibilites in particular:
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*** A2: listening to TestCollector and maintaing the list of test related info in the repository
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*** B0: instantiates the TestRunner for each new test run
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*** B1: providing a list of tests to be run by the TestRunner
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**** some sources: all tests from the repository, selection from a test tree, test according to the current selection of the IDE, a prioritizer component, selection by tags, ...)
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*** B3: creating an instance for the current TestRun (actually before starting)
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*** B2: starting the TestRunner (as reaction to some user action)
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*** B4: listening to the outputs of the TestRunner and maintaining the current TestRun object
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*** B5: adding the current TestRun object to the list of test runs in the repository
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** TO BE CLARIFIED: Should this work as a facade?
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** Events:
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*** BeforeCollectingTests (maybe better: BeforeScanningProject? - there are also the test-related modules)
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*** AfterCollectingTests (maybe better: AfterScanningProject? - reasoning as above)
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*** AddedTestRunToRepository(ITestRun)
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* '''TestCollector'''
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** Responsibility: Collects the relevant information for running tests. (rephrased: In order to run a test, no one has to go back to the VBProject to look up something)
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** Input: Events from a component in VbeProjectManagement or just a list of all modules in the VBProject
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** Output: IObservable<ITest>/Events
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*** FoundTestMethod(ITest)
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*** LostTestMethod(ITest)
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*** FoundTestRelatedMethod(IAttributedMethod)
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*** LostTestRelatedMethod(IAttributedMethod)
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** maybe better name: ProjectScanner
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*** there are not just the test classes itself, but also the test-related modules
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** TestManager listens to the output and maintains the list of all test related info in the repository
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* '''Repository.AllTests'''
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** Responsibility: Represents the current structure of the VBProject with respect to tests
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** Flat list (no fixture-tests hierarchy), hierarchies must be derived by UI components
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** Input: Method calls by the TestManager
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** Output: Enumeration/IObservable<ITest>/Events:
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*** AddedTest(ITest)
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*** RemovedTest(ITest)
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*** Cleared
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* '''Repository.TestRelated''' (NOT IN THE DRAWING)
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** Responsibility: Represents all modules in the VBProject that are just test-related, but not actually test fixtures.
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** global info needed by the TestRunner
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** Input: method calls by the TestManager in reaction to events from TestCollector
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** Output: none
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** The TestManager instantiates the TestRunner for each run with this information
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* '''TestRunner'''
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** Responsibility: Coordinates the calls to the methods of the test suite (tests and tag hook handler)
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** Note: Its the TestExecutor that actually invokes the methods via COM, not the TestRunner!
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** Input:
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*** List of tests (subset of test in Repository.AllTests)
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*** List of test related modules (Repository.TestRelated)
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** Output: IObservable<ITestResult>/Events
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*** StartingTestRun(bool cancel)
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*** StartedTestRun(ITestRun)
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*** TagSetChanged(IEnumerable<ITagChangeInfo>)
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*** FinishedTestRun(ITestRun)
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*** ITestRun steadiliy populated during the test run
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** The calling of tag hook handlers (see below) is also managed by the TestRunner
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* '''TestExecutor'''
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** Responsibility: Is able to instantiate classes and invoke methods and understands exceptions from failed assertions
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* Input:
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** name of the class to instantiate/terminate
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** name of the method to execute (along with parameters in the case of a call for a row test)
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* Output:
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** True: method call succeeded
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** False: an assertion failed (assertion message is provided to the TestRunner)
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** Non-Assert exceptions are passed to the TestRunner as is
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*** Future extension point: special handling for exceptions
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=== Conceptual ===
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* No support of FixtureSetup/FixtureTeardown
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** Seldom used, and when, then often misused (violating independency of tests)
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** More global setup/cleanup (as setting up backend for test) via tag-hooks
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* Tags applied on module level inherit to all children (test methods and rows in row tests)
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* Support for tag hierarchies?
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** path notation: e.g. DatabaseTests/ADO/Oracle
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* No guarantee how often a test class will be instantiated during a test run
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** discourage to use class scope (Initialize/Terminate and Fields)
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* Tag Hooks
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** Every time a tag appears during a test run, a setup tag-hook is called (if available)
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** Every time a tag vanishes during a test run, a teardown tag-hook is called (if available)
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** Tag hook handler
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*** reside in class modules annotated with AccUnit:TestRelated
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*** are tagged with AccUnit:Setup("MyTag"), and AccUnit:Teardown("MyTag"), resp.
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* Test related modules (AccUnit:TestRelated) can be standard modules or class modules
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** Test related modules with tag hooks (AccUnit:Setup("MyTag"), AccUnit:Teardown("MyTag")) must reside in class modules
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*** This helps to avoid global state enduring over the end of a test run (still could be done by copy state to fields in standard module)
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=== Technical ===
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* New assembly AccUnit.Framework
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** No References to COM (SimplyVbUnit/Access/TLI)
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* No IFixture
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** By now, no relevant information besides the name
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** The name of the fixture is a property of ITest
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* AccUnit:Rollback and AccUnit:ClickingMsgBox implemented as kind of plugins to the structure
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=== Data structures ===
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* IAttributedMethod
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** modulename
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** methodname
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** attributes
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* ITest
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** fixturename
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** methodname
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** attributes
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** tags (specialized subset of attributes)
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** rowdata (specialized subset of attributes)
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* ITestRun
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** ProjectInfo (Name of the file, version info?, ...)
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** List<ITestResult>
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** State (prepared, running, finished, canceled, aborted)
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** StartedAt
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** EndedAt
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** Summary
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* ITagChangeInfo
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** Tag (string)
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** Change (appeared/disappeared)
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=== Open issues ===
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* Test Reactive Extensions in a VBE AddIn
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Aktuelle Version vom 17:54, 14. Jan. 2012

Details siehe englische Version

Von „http://de.accunit.access-codelib.net/NewTestRunner“
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