我正在使用 Capybara 来测试我的 Rails 应用程序。
我需要测试一些 javascript，所以我设置了 webkit 来测试这些页面（不记得所有步骤，几个月前做了）。这是几个月前的一个这样的规范，效果很好：
describe "user fills in form", js: true, driver: :webkit do
...
end
该规范执行并通过就好了。
我制定了一个新规范并拥有这个规范：
describe "check player", js: true, driver: :webkit do
...
end
我得到这个错误：
2012-05-28 10:24:48.771 webkit_server[6274:207] Cannot find executable for CFBundle 0x104552dc0 </Library/Internet Plug-Ins/Unused> (not loaded)
2012-05-28 10:24:48.885 webkit_server[6274:207] Error loading /Applications/Amazon MP3 Downloader.app/Contents/Resources/AmazonMP3DownloaderPlugin.plugin/Contents/MacOS/AmazonMP3DownloaderPlugin: dlopen(/Applications/Amazon MP3 Downloader.app/Contents/Resources/AmazonMP3DownloaderPlugin.plugin/Contents/MacOS/AmazonMP3DownloaderPlugin, 262): no suitable image found. Did find:
/Applications/Amazon MP3 Downloader.app/Contents/Resources/AmazonMP3DownloaderPlugin.plugin/Contents/MacOS/AmazonMP3DownloaderPlugin: no matching architecture in universal wrapper
objc[6274]: Class WebCoreMovieObserver is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/Versions/A/WebCore. One of the two will be used. Which one is undefined.
objc[6274]: Class WebCoreSharedBufferData is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/Versions/A/WebCore. One of the two will be used. Which one is undefined.
objc[6274]: Class WebVideoFullscreenWindow is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit. One of the two will be used. Which one is undefined.
objc[6274]: Class WebVideoFullscreenController is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit. One of the two will be used. Which one is undefined.
objc[6274]: Class WebVideoFullscreenHUDWindowController is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit. One of the two will be used. Which one is undefined.
objc[6274]: Class WebVideoFullscreenHUDWindow is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit. One of the two will be used. Which one is undefined.
objc[6274]: Class WebWindowFadeAnimation is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit. One of the two will be used. Which one is undefined.
objc[6274]: Class WebWindowScaleAnimation is implemented in both /usr/local/Cellar/qt/4.8.0/lib/QtWebKit.framework/Versions/4/QtWebKit and /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit. One of the two will be used. Which one is undefined.
2012-05-28 10:24:48.981 webkit_server[6274:207] Error loading /Library/Internet Plug-Ins/npgtpo3dautoplugin.plugin/Contents/MacOS/npgtpo3dautoplugin: dlopen(/Library/Internet Plug-Ins/npgtpo3dautoplugin.plugin/Contents/MacOS/npgtpo3dautoplugin, 262): no suitable image found. Did find:
/Library/Internet Plug-Ins/npgtpo3dautoplugin.plugin/Contents/MacOS/npgtpo3dautoplugin: mach-o, but wrong architecture
2012-05-28 10:24:49.215 webkit_server[6274:207] Error loading /Library/Internet Plug-Ins/Silverlight.plugin/Contents/MacOS/agcore: dlopen(/Library/Internet Plug-Ins/Silverlight.plugin/Contents/MacOS/agcore, 262): no suitable image found. Did find:
/Library/Internet Plug-Ins/Silverlight.plugin/Contents/MacOS/agcore: mach-o, but wrong architecture
2012-05-28 10:24:49.262 webkit_server[6274:207] Error loading /Library/Internet Plug-Ins/googletalkbrowserplugin.plugin/Contents/MacOS/googletalkbrowserplugin: dlopen(/Library/Internet Plug-Ins/googletalkbrowserplugin.plugin/Contents/MacOS/googletalkbrowserplugin, 262): no suitable image found. Did find:
/Library/Internet Plug-Ins/googletalkbrowserplugin.plugin/Contents/MacOS/googletalkbrowserplugin: mach-o, but wrong architecture
2012-05-28 10:24:49.304 webkit_server[6274:207] Error loading /Library/Internet Plug-Ins/QuickTime Plugin.plugin/Contents/MacOS/QuickTime Plugin: dlopen(/Library/Internet Plug-Ins/QuickTime Plugin.plugin/Contents/MacOS/QuickTime Plugin, 265): no suitable image found. Did find:
/Library/Internet Plug-Ins/QuickTime Plugin.plugin/Contents/MacOS/QuickTime Plugin: mach-o, but wrong architecture
2012-05-28 10:24:49.356 webkit_server[6274:207] Error loading /Users/Tyler/Library/Internet Plug-Ins/Google Earth Web Plug-in.plugin/Contents/MacOS/libnpgeplugin.dylib: dlopen(/Users/Tyler/Library/Internet Plug-Ins/Google Earth Web Plug-in.plugin/Contents/MacOS/libnpgeplugin.dylib, 265): no suitable image found. Did find:
/Users/Tyler/Library/Internet Plug-Ins/Google Earth Web Plug-in.plugin/Contents/MacOS/libnpgeplugin.dylib: mach-o, but wrong architecture
2012-05-28 10:24:49.454 webkit_server[6274:207] Error loading /Library/Internet Plug-Ins/net.juniper.DSSafariExtensions.plugin/Contents/MacOS/net.juniper.DSSafariExtensions: dlopen(/Library/Internet Plug-Ins/net.juniper.DSSafariExtensions.plugin/Contents/MacOS/net.juniper.DSSafariExtensions, 262): no suitable image found. Did find:
/Library/Internet Plug-Ins/net.juniper.DSSafariExtensions.plugin/Contents/MacOS/net.juniper.DSSafariExtensions: mach-o, but wrong architecture
2012-05-28 10:24:49.823 webkit_server[6274:207] Error loading /Library/Internet Plug-Ins/SlingPlayer.plugin/Contents/MacOS/SlingPlayer: dlopen(/Library/Internet Plug-Ins/SlingPlayer.plugin/Contents/MacOS/SlingPlayer, 262): no suitable image found. Did find:
/Library/Internet Plug-Ins/SlingPlayer.plugin/Contents/MacOS/SlingPlayer: mach-o, but wrong architecture
2012-05-28 10:24:49.887 webkit_server[6274:207] Error loading /Library/Internet Plug-Ins/Unity Web Player.plugin/Contents/MacOS/Unity Web Player: dlopen(/Library/Internet Plug-Ins/Unity Web Player.plugin/Contents/MacOS/Unity Web Player, 262): no suitable image found. Did find:
/Library/Internet Plug-Ins/Unity Web Player.plugin/Contents/MacOS/Unity Web Player: no matching architecture in universal wrapper
奇怪的是，如果我为我的应用程序运行所有规范，第一个（使用 webkit 驱动程序）就可以工作。只有较新的规范会引发此错误。