Per-test file cleanup and new PsutilTestCase (#1743)

Test files/dirs are now removed after each test. when invoked via self.get_testfn().
Until now test files were stored in a global variable and were removed at process exit, via atexit.register(), but this didn't work with parallel tests because the fork()ed workers use os._exit(0), preventing cleanup functions to run.
All test classes now inherit from PsutilTestCase class, which provides the most important methods requiring an automatic cleanup (get_test_subprocess() and others).

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index f6e8ba70..86727ca7 100644
--- a/Makefile
+++ b/Makefile
@@ -59,7 +59,7 @@ clean:  ## Remove all build files.
 	rm -rf \
 		*.core \
 		*.egg-info \
-		*\$testfn* \
+		*\@psutil-* \
 		.coverage \
 		.failed-tests.txt \
 		.tox \