test: change how we keep mismatched actual output

Now when a goldtest has a failure, the actual mismatched output will be written
to the tests/actual directory.

Along the way, I removed some obsolete settings which were only used by unittest
and unittest_mixins, which we no longer use:

- COVERAGE_KEEP_TMP
- COVERAGE_ENV_ID
- $TMPDIR/coverage_test

1 files changed, 0 insertions, 9 deletions

diff --git a/tests/coveragetest.py b/tests/coveragetest.py
index 80e8853a..e5543a0b 100644
--- a/tests/coveragetest.py
+++ b/tests/coveragetest.py
@@ -51,15 +51,6 @@ class CoverageTest(
     # Let stderr go to stderr, pytest will capture it for us.
     show_stderr = True
 
-    # Temp dirs go to $TMPDIR/coverage_test/*
-    temp_dir_prefix = "coverage_test/"
-    if os.getenv('COVERAGE_ENV_ID'):                        # pragma: debugging
-        temp_dir_prefix += "{}/".format(os.getenv('COVERAGE_ENV_ID'))
-
-    # Keep the temp directories if the env says to.
-    # $set_env.py: COVERAGE_KEEP_TMP - Keep the temp directories made by tests.
-    keep_temp_dir = bool(int(os.getenv("COVERAGE_KEEP_TMP", "0")))
-
     def setup_test(self):
         super().setup_test()