run-tests: roll pytest() into PythonTest._run() Python was the old runner function. It no longer needs to exist since the PythonTest class took its job.

run-tests: remove threadtmp in Test.cleanup() threadtmp is an implementation detail. We move the cleanup of this directory to Test.cleanup() and make the variable internal. The cleanup function will eventually disappear into unittest machinery.

run-tests: allow Test.run() to run multiple times Test.run() can now be executed multiple times on the same Test instance. This feature is currently unused and there are no plans to implement it. The main reason for this work was to refactor testtmp, replacements, and env to be run-time specific as opposed to Test instance specific.

run-tests: capture reference output in TestResult class

run-tests: give TestResult a skipped attribute

run-tests: pass TestResult into run()

run-tests: capture execution results in a TestResult class Some implementation details of test execution still live outside of Test. These include determining what a result means and cleaning up after the test. To move to the world where more of this logic can live inside Test or a derived object, the logic for test execution needs to be refactored. Specifically, exception trapping and opportunities for result processing need to be moved into Test. This patch starts the process by establishing a TestResult class for holding the results of a test execution. In order to actually use this class, exception trapping and execution time recording needed to be moved into Test.run().

run-tests: clean up temp directory variables testtmp is an implementation detail. It didn't need to be exposed to the world. threadtmp is derived from count. It is now created as part of the constructor and mostly hidden from the outside world.

run-tests: move env into Test Environment variables are an implementation detail of how tests are executed. This patch moves environment variable logic into Test and completely hides it from the outside. With this patch, a Test can be executed with two lines: init + run(). Tests are still single-use and take a more arguments to the constructor than likely necessary. These will get addressed in subsequent patches.

run-tests: move killdaemons into Test.run() killdaemons() was the only part of runone() looking at env variables. We move killdaemons() into Test.run() to enable us to fully move env into Test.