From: Brian Curtin <brian.curtin@gmail.com>
Date: Tue, 1 Jun 2010 13:29:13 +0000 (+0000)
Subject: Fix #8618. Ask the Windows mixer API if there are any playback devices
X-Git-Tag: v2.7rc1~54
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=824912eb30d64c196e88602e5488803d8f16991a;p=python

Fix #8618. Ask the Windows mixer API if there are any playback devices
configured before attempting to test PlaySound.
---

diff --git a/Lib/test/test_winsound.py b/Lib/test/test_winsound.py
index 228dfa146a..366c74b6cd 100644
--- a/Lib/test/test_winsound.py
+++ b/Lib/test/test_winsound.py
@@ -5,6 +5,7 @@ from test import test_support
 import time
 import os
 import subprocess
+import ctypes
 
 winsound = test_support.import_module('winsound')
 import _winreg
@@ -12,6 +13,11 @@ import _winreg
 def has_sound(sound):
     """Find out if a particular event is configured with a default sound"""
     try:
+        # Ask the mixer API for the number of devices it knows about.
+        # When there are no devices, PlaySound will fail.
+        if ctypes.windll.winmm.mixerGetNumDevs() is 0:
+            return False
+
         key = _winreg.OpenKeyEx(_winreg.HKEY_CURRENT_USER,
                 "AppEvents\Schemes\Apps\.Default\{0}\.Default".format(sound))
         value = _winreg.EnumValue(key, 0)[1]