Add Testing framework as a submodule and test folder with example, closes #1

.gitignore

 # Ignore the user-specific initial_cache file
 initial_cache.cmake
+targets/*
+install/*
+build/*
+3rdparty/*
+examples/data/*.mtl
+examples/data/*.obj
+.idea/*
+cmake-build-debug/*

.gitmodules

@@ -13,3 +13,6 @@
 [submodule "3rdparty/mexplus"]
 	path = 3rdparty/mexplus
 	url = https://github.com/kyamagu/mexplus.git
+[submodule "3rdparty/Catch"]
+	path = 3rdparty/Catch
+	url = https://github.com/philsquared/Catch.git

CMakeLists.txt

@@ -64,6 +64,8 @@ option(GENERATE_PYTHON_BINDINGS "Build python bindings. Requires python to be in
 message(STATUS "GENERATE_PYTHON_BINDINGS: ${GENERATE_PYTHON_BINDINGS}")
 option(GENERATE_MATLAB_BINDINGS "Build Matlab bindings. Requires Matlab with the compiler installed or the Matlab Compiler Runtime." OFF)
 message(STATUS "GENERATE_MATLAB_BINDINGS: ${GENERATE_MATLAB_BINDINGS}")
+option(BUILD_TESTS "Build tests for this library." ON)
+message(STATUS "BUILD_TESTS: ${BUILD_TESTS}")
 
 
 # Build a CPack driven installer package:
@@ -75,7 +77,7 @@ set(CPACK_PACKAGE_VERSION_PATCH "${eos_VERSION_PATCH}")
 include(CPack)
 
 # Find dependencies:
-find_package(OpenCV 2.4.3 REQUIRED core)
+find_package(OpenCV REQUIRED core)
 message(STATUS "OpenCV include dir found at ${OpenCV_INCLUDE_DIRS}")
 message(STATUS "OpenCV lib dir found at ${OpenCV_LIB_DIR}")
 
@@ -168,6 +170,10 @@ install(FILES ${CMAKE_SOURCE_DIR}/3rdparty/nanoflann/COPYING DESTINATION 3rdpart
 install(DIRECTORY ${CMAKE_SOURCE_DIR}/3rdparty/eigen3-nnls/src/ DESTINATION 3rdparty/eigen3-nnls/src) # eigen3-nnls header
 install(FILES ${CMAKE_SOURCE_DIR}/3rdparty/eigen3-nnls/README.md DESTINATION 3rdparty/eigen3-nnls/) # eigen3-nnls attribution
 
+if(BUILD_TESTS)
+	add_subdirectory(tests)
+endif()
+
 if(BUILD_EXAMPLES)
 	add_subdirectory(examples)
 endif()

tests/CMakeLists.txt

+project(tests)
+cmake_minimum_required(VERSION 2.8.10)
+
+# The examples need a few additional dependencies (e.g. boost filesystem and OpenCV highgui):
+
+#check installed version in order to include the correct OpenCV libraries
+#version variable is defined from project root's CMakeLists
+if("${OpenCV_VERSION_MAJOR}$" EQUAL 2)
+    message(STATUS "OpenCV 2.x detected")
+    find_package(OpenCV 2.4.3 REQUIRED core imgproc highgui)
+elseif("${OpenCV_VERSION_MAJOR}$" EQUAL 3)
+    message(STATUS "OpenCV 3.x detected - including imgcodecs for compatibility")
+    find_package(OpenCV 3.0.0 REQUIRED core imgproc imgcodecs)
+endif()
+message(STATUS "OpenCV include dir found at ${OpenCV_INCLUDE_DIRS}")
+message(STATUS "OpenCV lib dir found at ${OpenCV_LIB_DIR}")
+# This allows us to compile in RelWithDebInfo. It'll use the Release-version of OpenCV:
+set_target_properties(${OpenCV_LIBS} PROPERTIES MAP_IMPORTED_CONFIG_RELWITHDEBINFO RELEASE)
+
+if(MSVC)
+    # The standard find_package for boost on Win finds the dynamic libs, so for dynamic linking to boost we need to #define:
+    add_definitions(-DBOOST_ALL_NO_LIB) # Don't use the automatic library linking by boost with VS (#pragma ...). Instead, we specify everything here in cmake.
+    add_definitions(-DBOOST_ALL_DYN_LINK) # Link against the dynamic boost lib - needs to match with the version that find_package finds.
+endif()
+find_package(Boost 1.50.0 COMPONENTS system filesystem program_options REQUIRED)
+if(Boost_FOUND)
+    message(STATUS "Boost found at ${Boost_INCLUDE_DIRS}")
+else(Boost_FOUND)
+    message(FATAL_ERROR "Boost not found")
+endif()
+
+if(MSVC)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /bigobj")
+endif()
+
+# Includes Catch in the project:
+enable_testing(true)  # Enables unit-testing.
+
+# Expose required variable (CATCH_INCLUDE_DIR) to parent scope
+set(CATCH_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/3rdparty/Catch/include CACHE INTERNAL "Path to include folder for Catch")
+
+add_library(Catch INTERFACE)
+target_include_directories(Catch INTERFACE ${CATCH_INCLUDE_DIR})
+
+add_executable (fitting-test fitting/fitting_test.cpp)
+target_link_libraries(fitting-test Catch ${OPENCV_LIBS} ${BOOST_LIBRARIES})
+
+add_test (NAME fitting-test COMMAND fitting-test)
+install(TARGETS fitting-test DESTINATION tests)
+
+
+# Simple model fitting (orthographic camera & shape to landmarks) example:
+#add_executable(fit-model-simple fit-model-simple.cpp)
+#add_executable(fitting-tests )
+#target_link_libraries(fit-model-simple ${OpenCV_LIBS} ${Boost_LIBRARIES})
+
+# install target:
+#install(TARGETS fit-model-simple DESTINATION bin)
+#install(DIRECTORY ${CMAKE_SOURCE_DIR}/examples/data DESTINATION bin)
+

tests/fitting/fitting_test.cpp

+#define CATCH_CONFIG_MAIN
+#include "catch.hpp"
+
+TEST_CASE("stupid/1=1", "Prove that one equals two" ){
+	int one = 1;
+	REQUIRE( one == 1 );
+}
+