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Automatically run appropriate tests when a method changes in Cincom Visualworks Smalltalk.

SUnitToo(ls)-AutoTest is licensed under the MIT license. See the Copyright tab in the RB, the 'notice' property of this package, or the License.txt file on GitHub.

SUnitToo(ls)-AutoTest's primary home is the Cincom Public Store Repository. Check there for the latest version. It is also on GitHub.

SUnitToo(ls)-AutoTest was developed in VW 7.9.1, but is compatible with VW 7.7 and later. If you find any incompatibilities with VW 7.7 or later, let me know (see below for contact information) or file an issue on GitHub.


SUnitToo(ls)-AutoTest automatically runs relevant SUnitToo tests when a method is changed. The tests to run are selected using the same approach as the standard SUnitToo(ls) use. If a test method is changed, then that method will be run. If a non-test method in a TestCase subclass is changed, then all of the tests in that class will be run. If a method in a non-TestCase subclass is changed, then all of the tests in the associated TestCase subclass (if any) will be run.

SUnitToo(ls)-AutoTest keeps track of a "hit count" for the changed method. That is, how many times the method was executed while running the associated tests. This allows you to see at a glance whether the method you just changed is covered by the relevant tests.


By default, SUnitToo(ls)-AutoTest is inactive when loaded into an image. In order to activate it, one or more AutoTest UIs must be active. SUnitToo(ls)-AutoTest currently has two UIs available:

  • The main AutoTestUI: This UI runs in a separate window. It can be opened by selecting Tools -> AutoTest UI in the Launcher. This window displays the status of running or completed tests, as well as the hit count for the last changed method. In addition, it allows you to cancel the current test run. If any tests fail or raise errors, you can click on the test status portion of the window to browse the failing tests. If only one test has failed or errored, the test will automatically be run again, opening a debugger to show the failure or error.

  • The AutoTest Notifier (Linux only for now): The AutoTest Notifier does not show a window on the screen. Rather, it integrates with your desktop environment's notification system to display a pop-up notification whenever a test run is complete. The position, appearance, and duration of the notification can be configured using your desktop environment's settings. To enable the AutoTest Notifier, select Tools -> AutoTest Notifier in the Launcher.

If you desire, you can run both AutoTest UI's at the same time. To disable AutoTest, simply close the AutoTest UI and disable the AutoTest Notifier. AutoTest will then be inactive until a UI is opened again.


  • SUnitToo(ls)-AutoTest does not run tests when class definitions are changed. Class change notifications are triggered at some inopportune times (such as when loading code from Store), and so I removed the code that triggers test runs on class definition changes.

  • SUnitToo(ls)-AutoTest does update the state of the method and class icons when run, but those changes are not immediately visible until some other action causes the browser to redisplay itself. The browser does not provide a proper API for such a refresh. There is an API that could be used, but it also causes any in-progress code changes to be lost, which is unacceptable.

  • AutoTest Notifier is Linux-only at present. If you are interested in an AutoTest Notifier for another platform, I'd be happy to accept contributions. I will likely implement something for Mac OS/X when I have time.

  • It is sometimes not safe to have SUnitToo(ls)-AutoTest active when working on some kinds of code, particularly DLLCC interfaces that are under active development. Sometimes, running such a test at the wrong time can crash an image. When working on such code, I recommend closing the AutoTest UI and disabling the AutoTest Notifier to deactivate AutoTest.

Understanding the Code

AutoTest is the main class. It is a singleton. When active, it listens for announcements from a ChangeSetListener, asks a BuildSuite to create a test suite, and then runs it using SuiteRunner. SuiteRunner reports its progress by asking AutoTestAnnouncer to announce various progress announcements. A MethodHitCounter (a MethodWrapper) is installed for the duration of the test run to report a HitCount for the changed method. An AutoTestResults contains the final results of the test run.


SUnitToo(ls)-AutoTest was inspired by the Pharo Autotest package by Laurent Laffont.


I'm happy to receive bug fixes and improvements to this package. If you'd like to contribute, please publish your changes as a "branch" (non-integer) version in the Public Store Repository and contact me as outlined below to let me know. I will merge your changes back into the "trunk" as soon as I can review them.

Contact Information

If you have any questions about SUnitToo(ls)-AutoTest and how to use it, feel free to contact me.


Automatically run relevant SUnitToo tests when a method is changed.







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