TextureTools: make the test files properly accessible on an iOS device.

Testing exclusively on the iOS Simulator isn't a good thing after all.

src/Magnum/TextureTools/Test/CMakeLists.txt

@@ -59,7 +59,14 @@ if(BUILD_GL_TESTS)
                        ${CMAKE_CURRENT_BINARY_DIR}/configure.h)
     endif()
 
-    corrade_add_test(TextureToolsDistanceFieldGLTest DistanceFieldGLTest.cpp
+    set(TextureToolsDistanceFieldGLTest_SRCS DistanceFieldGLTest.cpp)
+    if(CORRADE_TARGET_IOS)
+        # TODO: do this in a generic way in corrade_add_test()
+        set_source_files_properties(DistanceFieldGLTestFiles PROPERTIES
+            MACOSX_PACKAGE_LOCATION Resources)
+        list(APPEND TextureToolsDistanceFieldGLTest_SRCS DistanceFieldGLTestFiles)
+    endif()
+    corrade_add_test(TextureToolsDistanceFieldGLTest ${TextureToolsDistanceFieldGLTest_SRCS}
         LIBRARIES MagnumTextureTools MagnumGL MagnumTrade MagnumDebugTools MagnumOpenGLTester
         FILES
             DistanceFieldGLTestFiles/input.tga

src/Magnum/TextureTools/Test/DistanceFieldGLTest.cpp

@@ -58,6 +58,7 @@ struct DistanceFieldGLTest: GL::OpenGLTester {
 
     private:
         PluginManager::Manager<Trade::AbstractImporter> _manager;
+        std::string _testDir;
 };
 
 DistanceFieldGLTest::DistanceFieldGLTest() {
@@ -73,6 +74,20 @@ DistanceFieldGLTest::DistanceFieldGLTest() {
     CORRADE_INTERNAL_ASSERT(_manager.load(ANYIMAGEIMPORTER_PLUGIN_FILENAME) & PluginManager::LoadState::Loaded);
     CORRADE_INTERNAL_ASSERT(_manager.load(TGAIMPORTER_PLUGIN_FILENAME) & PluginManager::LoadState::Loaded);
     #endif
+
+    #ifdef CORRADE_TARGET_APPLE
+    if(Utility::Directory::isSandboxed()
+        #if defined(CORRADE_TARGET_IOS) && defined(CORRADE_TESTSUITE_TARGET_XCTEST)
+        /** @todo Fix this once I persuade CMake to run XCTest tests properly */
+        && std::getenv("SIMULATOR_UDID")
+        #endif
+    ) {
+        _testDir = Utility::Directory::join(Utility::Directory::path(Utility::Directory::executableLocation()), "DistanceFieldGLTestFiles");
+    } else
+    #endif
+    {
+        _testDir = DISTANCEFIELDGLTEST_FILES_DIR;
+    }
 }
 
 void DistanceFieldGLTest::test() {
@@ -80,7 +95,7 @@ void DistanceFieldGLTest::test() {
     if(!(importer = _manager.loadAndInstantiate("TgaImporter")))
         CORRADE_SKIP("TgaImporter plugin not found.");
 
-    CORRADE_VERIFY(importer->openFile(Utility::Directory::join(DISTANCEFIELDGLTEST_FILES_DIR, "input.tga")));
+    CORRADE_VERIFY(importer->openFile(Utility::Directory::join(_testDir, "input.tga")));
     CORRADE_COMPARE(importer->image2DCount(), 1);
     Containers::Optional<Trade::ImageData2D> inputImage = importer->image2D(0);
     CORRADE_VERIFY(inputImage);
@@ -182,7 +197,7 @@ void DistanceFieldGLTest::test() {
     #endif
 
     CORRADE_COMPARE_WITH(*actualOutputImage,
-        Utility::Directory::join(DISTANCEFIELDGLTEST_FILES_DIR, "output.tga"),
+        Utility::Directory::join(_testDir, "output.tga"),
         DebugTools::CompareImageToFile{_manager});
 }
 
@@ -192,7 +207,7 @@ void DistanceFieldGLTest::benchmark() {
     if(!(importer = _manager.loadAndInstantiate("TgaImporter")))
         CORRADE_SKIP("TgaImporter plugin not found.");
 
-    CORRADE_VERIFY(importer->openFile(Utility::Directory::join(DISTANCEFIELDGLTEST_FILES_DIR, "input.tga")));
+    CORRADE_VERIFY(importer->openFile(Utility::Directory::join(_testDir, "input.tga")));
     CORRADE_COMPARE(importer->image2DCount(), 1);
     Containers::Optional<Trade::ImageData2D> inputImage = importer->image2D(0);
     CORRADE_VERIFY(inputImage);