bpo-31904: Fix test_c_locale_coercion encodings for VxWorks RTOS (GH-19448)

Author: pxinwr

Lib/test/test_c_locale_coercion.py

@@ -49,6 +49,10 @@
     # TODO: Work out a robust dynamic test for this that doesn't rely on
     #       CPython's own locale handling machinery
     EXPECT_COERCION_IN_DEFAULT_LOCALE = False
+elif sys.platform == "vxworks":
+    # VxWorks defaults to using UTF-8 for all system interfaces
+    EXPECTED_C_LOCALE_STREAM_ENCODING = "utf-8"
+    EXPECTED_C_LOCALE_FS_ENCODING = "utf-8"
 
 # Note that the above expectations are still wrong in some cases, such as:
 # * Windows when PYTHONLEGACYWINDOWSFSENCODING is set

Misc/NEWS.d/next/Tests/2020-04-09-16-29-18.bpo-31904.ej348T.rst

@@ -0,0 +1 @@
+Set expected default encoding in test_c_locale_coercion.py for VxWorks RTOS.