Add google test

Add separate tests for different pairs, tuples and structs

Based on code by Cody
Signed-off-by: Cody W. Eilar <Cody.Eilar@Gmail.com>
Signed-off-by: James Sharpe <mail@jsharpe.net>

CMakeLists.txt

@@ -17,19 +17,28 @@ use_cxx11()
 find_package(HDF5 REQUIRED COMPONENTS C HL)
 find_package(Boost REQUIRED COMPONENTS system)
 find_package(MPI REQUIRED)
+find_package(GTest REQUIRED) 
+
+enable_testing()
 
 include_directories(  
-    ${MPI_INCLUDE_PATH}
-    ${HDF5_INCLUDE_DIRS}
-    ${boost_INCLUDE_DIRS}
-    )
+  ${GTEST_INCLUDE_DIRS}
+  ${HDF5_INCLUDE_DIRS}
+  ${MPI_INCLUDE_PATH}
+  ${boost_INCLUDE_DIRS}
+  )
 
 include_directories(..)
 
 add_executable(hdf5_tests test-hdf.cpp )
-target_link_libraries(hdf5_tests ${HDF5_LIBRARIES} ${Boost_LIBRARIES} ${HDF5_LIBRARIES} ${MPI_C_LIBRARIES})
+
+target_link_libraries(hdf5_tests
+  ${Boost_LIBRARIES}
+  ${GTEST_BOTH_LIBRARIES}
+  ${HDF5_LIBRARIES}
+  ${HDF5_LIBRARIES}
+  ${MPI_C_LIBRARIES}
+  )
 
 add_test(NAME hdf5
 	COMMAND hdf5_tests)
-
-enable_testing()