AnySceneImporter: test meshAttribute[For]Name() propagation.

It should work even if no file is opened, but that ... crashes.

src/MagnumPlugins/AnySceneImporter/Test/AnySceneImporterTest.cpp

@@ -64,6 +64,9 @@ struct AnySceneImporterTest: TestSuite::Tester {
     void propagateConfigurationUnknown();
     void propagateFileCallback();
 
+    void meshAttributeName();
+    void meshAttributeNameNoFileOpened();
+
     /* Explicitly forbid system-wide plugin dependencies */
     PluginManager::Manager<AbstractImporter> _manager{"nonexistent"};
 };
@@ -108,7 +111,10 @@ AnySceneImporterTest::AnySceneImporterTest() {
               &AnySceneImporterTest::propagateFlags,
               &AnySceneImporterTest::propagateConfiguration,
               &AnySceneImporterTest::propagateConfigurationUnknown,
-              &AnySceneImporterTest::propagateFileCallback});
+              &AnySceneImporterTest::propagateFileCallback,
+
+              &AnySceneImporterTest::meshAttributeName,
+              &AnySceneImporterTest::meshAttributeNameNoFileOpened});
 
     /* Load the plugin directly from the build tree. Otherwise it's static and
        already loaded. */
@@ -307,6 +313,31 @@ void AnySceneImporterTest::propagateFileCallback() {
     CORRADE_VERIFY(!importer->isOpened());
 }
 
+void AnySceneImporterTest::meshAttributeName() {
+    PluginManager::Manager<AbstractImporter> manager{MAGNUM_PLUGINS_IMPORTER_INSTALL_DIR};
+    #ifdef ANYSCENEIMPORTER_PLUGIN_FILENAME
+    CORRADE_VERIFY(manager.load(ANYSCENEIMPORTER_PLUGIN_FILENAME) & PluginManager::LoadState::Loaded);
+    #endif
+
+    if(manager.load("GltfImporter") < PluginManager::LoadState::Loaded)
+        CORRADE_SKIP("GltfImporter plugin can't be loaded.");
+
+    Containers::Pointer<AbstractImporter> importer = manager.instantiate("AnySceneImporter");
+
+    CORRADE_VERIFY(importer->openFile(Utility::Path::join(ANYSCENEIMPORTER_TEST_DIR, "mesh-custom-attribute.gltf")));
+    CORRADE_COMPARE(importer->meshAttributeForName("_TBN"), meshAttributeCustom(2));
+    CORRADE_COMPARE(importer->meshAttributeForName("nonexistent"), MeshAttribute{});
+    CORRADE_COMPARE(importer->meshAttributeName(meshAttributeCustom(2)), "_TBN");
+    CORRADE_COMPARE(importer->meshAttributeName(meshAttributeCustom(3)), "");
+}
+
+void AnySceneImporterTest::meshAttributeNameNoFileOpened() {
+    Containers::Pointer<AbstractImporter> importer = _manager.instantiate("AnySceneImporter");
+
+    CORRADE_COMPARE(importer->meshAttributeForName(""), MeshAttribute{});
+    CORRADE_COMPARE(importer->meshAttributeName(meshAttributeCustom(0)), "");
+}
+
 }}}}
 
 CORRADE_TEST_MAIN(Magnum::Trade::Test::AnySceneImporterTest)

src/MagnumPlugins/AnySceneImporter/Test/CMakeLists.txt

@@ -56,6 +56,7 @@ corrade_add_test(AnySceneImporterTest AnySceneImporterTest.cpp
     LIBRARIES MagnumTrade
     FILES
         ${PROJECT_SOURCE_DIR}/src/MagnumPlugins/ObjImporter/Test/pointMesh.obj
+        mesh-custom-attribute.gltf
         triangle.ply)
 target_include_directories(AnySceneImporterTest PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>)
 if(MAGNUM_ANYSCENEIMPORTER_BUILD_STATIC)

src/MagnumPlugins/AnySceneImporter/Test/mesh-custom-attribute.gltf

@@ -0,0 +1,38 @@
+{
+  "asset": {
+    "version": "2.0"
+  },
+  "meshes": [
+    {
+      "primitives": [
+        {
+          "attributes": {
+            "_TBN": 0
+          }
+        }
+      ]
+    }
+  ],
+  "accessors": [
+    {
+      "bufferView": 0,
+      "componentType": 5120,
+      "normalized": true,
+      "count": 1,
+      "type": "MAT3"
+    }
+  ],
+  "bufferViews": [
+    {
+      "buffer": 0,
+      "byteLength": 36
+    }
+  ],
+  "buffers": [
+    {
+      "byteLength": 36,
+      "comment": "base64.b64encode(bytes(36))",
+      "uri": "data:application/octet-stream;base64,AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
+    }
+  ]
+}