python: resolve a test TODO now that we have plugin metadata access.

package/ci/appveyor-desktop-gles.bat

@@ -63,6 +63,7 @@ cmake .. ^
     -DMAGNUM_WITH_WINDOWLESSWGLAPPLICATION=ON ^
     -DMAGNUM_WITH_ANYIMAGEIMPORTER=ON ^
     -DMAGNUM_WITH_ANYSCENECONVERTER=ON ^
+    -DMAGNUM_WITH_TGAIMPORTER=ON ^
     -G Ninja || exit /b
 cmake --build . || exit /b
 cmake --build . --target install || exit /b

package/ci/appveyor-desktop.bat

@@ -73,6 +73,7 @@ cmake .. ^
     -DMAGNUM_WITH_WINDOWLESSWGLAPPLICATION=ON ^
     -DMAGNUM_WITH_ANYIMAGEIMPORTER=ON ^
     -DMAGNUM_WITH_ANYSCENECONVERTER=ON ^
+    -DMAGNUM_WITH_TGAIMPORTER=ON ^
     %COMPILER_EXTRA% -G Ninja || exit /b
 cmake --build . || exit /b
 cmake --build . --target install || exit /b

package/ci/unix-desktop-gles.sh

@@ -46,6 +46,7 @@ cmake .. \
     -DMAGNUM_WITH_WINDOWLESSEGLAPPLICATION=ON \
     -DMAGNUM_WITH_ANYIMAGEIMPORTER=ON \
     -DMAGNUM_WITH_ANYSCENECONVERTER=ON \
+    -DMAGNUM_WITH_TGAIMPORTER=ON \
     -G Ninja
 ninja install
 cd ../..

package/ci/unix-desktop.sh

@@ -47,6 +47,7 @@ cmake .. \
     -DMAGNUM_WITH_WINDOWLESS${PLATFORM_GL_API}APPLICATION=ON \
     -DMAGNUM_WITH_ANYIMAGEIMPORTER=ON \
     -DMAGNUM_WITH_ANYSCENECONVERTER=ON \
+    -DMAGNUM_WITH_TGAIMPORTER=ON \
     -G Ninja
 
 # In case of a static build there's no way for the test to know the plugin

src/python/magnum/test/test_trade.py

@@ -1005,9 +1005,16 @@ class Importer(unittest.TestCase):
 
     def test_set_preferred_plugins(self):
         manager = trade.ImporterManager()
-        # TODO test this better once we can verify it gets actually loaded
+
+        # TGA importer is loaded directly
+        importer = manager.load_and_instantiate('TgaImporter')
+        self.assertEqual(importer.metadata.name, 'TgaImporter')
+
         manager.set_preferred_plugins('TgaImporter', ['StbImageImporter', 'DevIlImageImporter'])
-        self.assertIn('StbImageImporter', manager.alias_list)
+
+        # TGA importer is loaded from the preferred implementation
+        importer = manager.load_and_instantiate('TgaImporter')
+        self.assertEqual(importer.metadata.name, 'StbImageImporter')
 
     def test_set_preferred_plugins_alias_not_found(self):
         manager = trade.ImporterManager()