Fix test_undecodable_env of test_subproces for non-ASCII directory

Victor Stinner · Victor Stinner · commit ce2d24d54987 · 2010-04-23T22:55:39.000Z
This test was introduced by r80421 (issue #8391). The fix: copy the environment variables instead of starting Python in an empty environement. In an empty environment, the locale is C and Python uses ASCII for the default file system encoding. The non-ASCII directory will be encoded using surrogates, but Python3 is unable to load a module or package with a filename using surrogates. See issue #8242 for more information about running Python3 with a non-ascii directory in an empty environement.
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
@@ -807,19 +807,23 @@ def test_undecodable_env(self):
 
             # test str with surrogates
             script = "import os; print(repr(os.getenv(%s)))" % repr(key)
+            env = os.environ.copy()
+            env[key] = value
             stdout = subprocess.check_output(
                 [sys.executable, "-c", script],
-                env={key: value})
+                env=env)
             stdout = stdout.rstrip(b'\n\r')
             self.assertEquals(stdout, value_repr)
 
             # test bytes
             key = key.encode("ascii", "surrogateescape")
             value = value.encode("ascii", "surrogateescape")
             script = "import os; print(repr(os.getenv(%s)))" % repr(key)
+            env = os.environ.copy()
+            env[key] = value
             stdout = subprocess.check_output(
                 [sys.executable, "-c", script],
-                env={key: value})
+                env=env)
             stdout = stdout.rstrip(b'\n\r')
             self.assertEquals(stdout, value_repr)
 
