Add a comment pointing to Xcode 6's XCTestExpectation for testing asynchronous behavior.
Add a comment pointing to Xcode 6's XCTestExpectation for testing asynchronous behavior.

DELTA=4 (4 added, 0 deleted, 0 changed)
DELTA_BY_EXTENSION=h=4
isongga/google-toolbox-for-mac,isongga/google-toolbox-for-mac,isongga/google-toolbox-for-mac