bpo-28180: Fix test_capi.test_forced_io_encoding() (python#2155)

vstinner · web-flow · commit eb52ac89929b · 2017-06-13T11:49:44.000+02:00
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
@@ -480,7 +480,7 @@ def test_subinterps_distinct_state(self):
 
     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()
