Adding support for unit testing using boost unit test and ctest

tests/CMakeLists.txt

@@ -0,0 +1,42 @@
+#
+# CMakeLists.txt - CMake configuration file for epanet/tests
+#
+# Created: February 13, 2018
+# Author:  Constantin Savtchenko
+# Ref: http://neyasystems.com/an-engineers-guide-to-unit-testing-cmake-and-boost-unit-tests/
+#
+# Modified by: Michael E. Tryby
+#              US EPA ORD/NRMRL
+# 
+
+#Setup CMake to run tests
+enable_testing()
+
+#Prep ourselves for compiling boost
+find_package(Boost COMPONENTS unit_test_framework REQUIRED)
+include_directories (${Boost_INCLUDE_DIRS} ../include ../tools/epanet-output/src)
+
+#I like to keep test files in a separate source directory called test
+file(GLOB TEST_SRCS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} test_*.cpp)
+
+#Run through each source
+foreach(testSrc ${TEST_SRCS})
+        #Extract the filename without an extension (NAME_WE)
+        get_filename_component(testName ${testSrc} NAME_WE)
+
+        #Add compile target
+        add_executable(${testName} ${testSrc})
+
+        #link to Boost libraries AND your targets and dependencies
+        target_link_libraries(${testName} ${Boost_LIBRARIES} epanet epanet-output)
+
+        #I like to move testing binaries into a testBin directory
+        set_target_properties(${testName} PROPERTIES 
+            RUNTIME_OUTPUT_DIRECTORY  ${CMAKE_BINARY_DIR}/bin)
+
+        #Finally add it to test execution - 
+        #Notice the WORKING_DIRECTORY and COMMAND
+        add_test(NAME ${testName}
+                 COMMAND ${CMAKE_BINARY_DIR}/bin/${testName}  
+                 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/data)
+endforeach(testSrc)