[gtest] Create a shared include directory for gtest utilities.

Many times unit tests for different libraries would like to use
the same helper functions for checking common types of errors.

This patch adds a common library with helpers for testing things
in Support, and introduces helpers in here for integrating the
llvm::Error and llvm::Expected<T> classes with gtest and gmock.

Normally, we would just be able to write:

   EXPECT_THAT(someFunction(), succeeded());

but due to some quirks in llvm::Error's move semantics, gmock
doesn't make this easy, so two macros EXPECT_THAT_ERROR() and
EXPECT_THAT_EXPECTED() are introduced to gloss over the difficulties.
Consider this an exception, and possibly only temporary as we
look for ways to improve this.

Differential Revision: https://reviews.llvm.org/D33059

llvm-svn: 305395

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/Testing/Support/CMakeLists.txt b/llvm/lib/Testing/Support/CMakeLists.txt
new file mode 100644
index 00000000000..fa8dfe59c8b
--- /dev/null
+++ b/llvm/lib/Testing/Support/CMakeLists.txt
@@ -0,0 +1,12 @@
+add_llvm_library(LLVMTestingSupport
+  Error.cpp
+
+  BUILDTREE_ONLY
+  
+  ADDITIONAL_HEADER_DIRS
+  ${LLVM_MAIN_INCLUDE_DIR}/llvm/Testing/Support
+  )
+
+include_directories(${LLVM_MAIN_SRC_DIR}/utils/unittest/googletest/include)
+include_directories(${LLVM_MAIN_SRC_DIR}/utils/unittest/googlemock/include)
+target_link_libraries(LLVMTestingSupport PRIVATE gtest)
\ No newline at end of file