问题
Created a new OS X library project, deleted the Objective-C stubs and add a Swift file (Empty.swift). In the same directory, added a unit test (new->Unit Test), EmptyTest.swift. The code generated won't compile because this OS X library project doesn't know how to resolve the dependency to XCTest.
XCTest is at this location /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/XCTest
The solution for command line tools is here (How can I run XCTest for a swift application from the command line?). How to add the dependency using Xcode 7?
回答1:
You can add Unit test case via new target instead of creating file in the same target
File - New - Target - OS X -Test - OS X Unit Testing Bundle
When you create new unit testing bundle it creates new unit test swift file with XCTest as dependancy When you run this target it don't show the error of XCTest
Update : If you want it in the same target.
In the Build Settings find FRAMEWORK_SEARCH_PATHS and add $(PLATFORM_DIR)/Developer/Library/Frameworks in it
after that if you build your app will build successfully
回答2:
Show the File Inspector and check the Target Membership on EmptyTest.swift. I'm betting you added it to the production target, when it should be in the test target instead.
来源：https://stackoverflow.com/questions/35686679/add-xctest-dependency-to-xcode-7-project