命令xctool -workspace Foo.xcworkspace -scheme Foo -sdk macosx -configuration Debug test -test-sdk macosx在本地工作，所有测试通过。
使用Travis我会收到以下错误：
Failed to query the list of test cases in the test bundle: dlopen(/Users/travis/Library/Developer/Xcode/DerivedData/Foo-bvxkmfrwzzvtxgaeoosknyzjovjc/Build/Products/Debug/OS X Tests.xctest/Contents/MacOS/OS X Tests, 2): Symbol not found: _NSURLSessionTransferSizeUnknown
Referenced from: /Users/travis/Library/Developer/Xcode/DerivedData/Foo-bvxkmfrwzzvtxgaeoosknyzjovjc/Build/Products/Debug/OS X Tests.xctest/Contents/MacOS/OS X Tests
Expected in: /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
in /Users/travis/Library/Developer/Xcode/DerivedData/Foo-bvxkmfrwzzvtxgaeoosknyzjovjc/Build/Products/Debug/OS X Tests.xctest/Contents/MacOS/OS X Tests
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** TEST FAILED: 0 passed, 0 failed, 0 errored, 0 total ** (21121 ms)
The command "xctool -workspace Foo.xcworkspace -scheme Foo -sdk macosx -configuration Debug test -test-sdk macosx" exited with 1.
我的.travis.yml文件如下：
language: objective-c
before_install:
- gem install cocoapods --no-ri --no-rdoc --no-document --quiet
- brew update
- brew uninstall xctool
- brew install xctool
script:
- xctool -workspace Foo.xcworkspace -scheme Foo -sdk macosx -configuration Debug test -test-sdk macosx
为什么会发生这种情况，我该如何解决？
travis当前不支持小牛，这是问题的根本原因。
在GitHub上正在跟踪对10.9的支持。