Hi, I struggle for a functionality I want to add on Autotest. Suppose a class with two methods A and B, such as A senders of B Zork>>methodA self methodB And unit tests: ZorkTest>>testSomething ..... Zork new methodA ... self assert: .... If I change methodA, Autotest detects it, search all senders of methodA in tests and run. As ZorkTest>>testSomething is sender of Zork>>methodA, it will find and run it. Now if I change methodB and there's no senders in tests, the previous heuristic won't work. So I added as last heuristic: if no method found, search all TestCases that references the changed method class and run. So here it will find ZorkTest and run all its tests. The problem is that I don't really know if the method I've changed has been actually "hit" by the tests. I just see that tests has been run. I don't know if my method has been called when running the tests. So I want to detect this. One way of doing this seems to use MethodContext>>runSimulated:contextAtEachStep:. I've found this looking at MessageTally. Is it the best solution ? So in Autotest>>findRunAndShowTestsOf: I try something like this Autotest>>findRunAndShowTestsOf:changedMethod | testMethods aTestResult methodHit | "Finds the test related to changedMethod, run them and tell the view to update" testMethods := search methodsFor: changedMethod. methodHit := false. thisContext sender runSimulated: [aTestResult := runner run: testMethods] contextAtEachStep: [:current| (current method = changedMethod) "<--- here I detect if changedMethod has been hit" ifTrue: [methodHit := true]]. ..... but using this debugger opens with "SimulationGuardException: triggered by BlockClosure>>newProcess" in MethodContext>>doPrimitive:method:receiver:args: As I don't (yet :) understand all this stuff, I want to know if it's the right way to do it and what should I check. Thanks Laurent Laffont http://pharocasts.blogspot.com/ http://magaloma.blogspot.com/