Support context-aware subprocess tracking in tests

conftest.py

@@ -161,3 +161,9 @@ def pytest_runtest_setup(item):
 
 # Generate localhost certificate files, needed by some tests
 generate_keys()
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_runtest_setup(item):
+    import os
+    os.environ["DELTA_TEST_NAME"] = item.nodeid

tests/sitecustomize.py

@@ -1,2 +1,12 @@
+import os
 import coverage
+
+# Start coverage first as configured
 coverage.process_startup()
+
+# If started, set the context to the active test name
+cov = coverage.Coverage.current()
+if cov:
+    test_name = os.environ.get("DELTA_TEST_NAME")
+    if test_name:
+        cov.switch_context(test_name)