bpo-28180: Fix test_capi.test_forced_io_encoding() (#2155)
Don't run Python in an empty environment, but copy the current
environment and set PYTHONIOENCODING. So the test works also on
Python compiled in shared mode (using libpython).
diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index c4a9766..1cf5cd7 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -480,7 +480,7 @@
def test_forced_io_encoding(self):
# Checks forced configuration of embedded interpreter IO streams
- env = {"PYTHONIOENCODING": "utf-8:surrogateescape"}
+ env = dict(os.environ, PYTHONIOENCODING="utf-8:surrogateescape")
out, err = self.run_embedded_interpreter("forced_io_encoding", env=env)
if support.verbose > 1:
print()