Merge /u/alonsoschaich/zint/ branch enable-qt-test-on-win32 into master

https://sourceforge.net/p/zint/code/merge-requests/141/

backend/tests/README

@@ -8,8 +8,18 @@ ZINT_TEST option enabled:
   mkdir build
   cd build
   cmake -DZINT_TEST=ON ..
-  make
+  cmake --build .
 
+When using generators that support multiple build configurations, such as
+Visual C++ Project Files (the default generator on win32), the configuration
+can be provided via --config:
+
+  cd <project-dir>
+  mkdir build
+  cd build
+  cmake -DZINT_TEST=ON ..
+  cmake --build . --config Debug
+  
 ------------------------------------------------------------------------------
 
 In order to run the test suite, the path of the zint library may need to be
@@ -29,6 +39,12 @@ To run all tests (within <build-dir>):
 
   ctest
 
+When using a generator that does support multiple build configurations, the
+configuration that was used to build the project has to be explicitly provided
+to ctest, even if it was the default one:
+
+  ctest -C Debug
+
 For various useful options, e.g. matching (-R) and excluding (-E) tests, see
 https://cmake.org/cmake/help/latest/manual/ctest.1.html#options
 

backend_qt/CMakeLists.txt

@@ -21,7 +21,7 @@ target_include_directories(${PROJECT_NAME} PUBLIC "${CMAKE_SOURCE_DIR}/backend")
 
 target_link_libraries(${PROJECT_NAME} zint Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::Gui)
 
-if(ZINT_TEST AND NOT WIN32) # Fails with "Test not available without configuration" on Windows so skip
+if(ZINT_TEST)
     add_subdirectory(tests)
 endif()