xctest.sh

# It's relatively easy to run Apple XCTest on OS X and swift-corelibs-xctest on Linux.
# Just look at apple/swift-corelibs-foundation for an example.
#
# But it's pretty difficult to run swift-corelibs-xctest on OS X.
#
# Let's say we have the following file:
#
#     // main.swift
#     import XCTest
#     XCTMain([])
#
# To compile this on Linux:
swiftc main.swift -o MyTest
# And to run:
./MyTest

# To compile this on OS X:
export BUILT_PRODUCTS_DIR=/Users/bgesiak/Library/Developer/Xcode/DerivedData/XCTest-bzxmivvccdrmtvctkfgutfkgbsze/Build/Products/Debug
xcrun -sdk `xcrun --sdk macosx --show-sdk-path` \
      swiftc \
      -target x86_64-apple-macosx10.11 \
      -L$BUILT_PRODUCTS_DIR \
      -I$BUILT_PRODUCTS_DIR \
      -F$BUILT_PRODUCTS_DIR \
      -Xlinker -rpath \
      -Xlinker $BUILT_PRODUCTS_DIR \
      main.swift -o MyTest
# And to run:
./MyTest