feat: only instantiate test resources once in Pharo

[theseion]

Fixes #661

Note: also includes a change to the project loading code. The Moose images already contain SmalltalkCI, which prevented the changes in this PR from being picked up. We now force load SmalltalkCI in Pharo and GToolkit builds.

[Rinzwind]

Looks OK. A slight improvement that could be made is to make #testResourcesSetupOnce assert that the counters are nil before the send of #runSpec: so as to make the change to the counters clear in the test. The exclusion of SCIPharoTestSuiteNestingTestCase1 and SCIPharoTestSuiteNestingTestCase2 could perhaps be handled by adding them to the #exclude in ‘.smalltalk.ston’ instead of through the reflective #isAbstract implementation.

[theseion]

Looks OK. A slight improvement that could be made is to make #testResourcesSetupOnce assert that the counters are nil before the send of #runSpec: so as to make the change to the counters clear in the test.

Good idea.

The exclusion of SCIPharoTestSuiteNestingTestCase1 and SCIPharoTestSuiteNestingTestCase2 could perhaps be handled by adding them to the #exclude in ‘.smalltalk.ston’ instead of through the reflective #isAbstract implementation.

I chose #isAbstract on purpose, to prevent these tests from being available for running in the image as well. They would fail and that would be difficult to understand.