tests: add unit tests for VRML file with textures

tests/src/App/CMakeLists.txt

@@ -20,4 +20,5 @@ target_sources(
             ${CMAKE_CURRENT_SOURCE_DIR}/PropertyExpressionEngine.cpp
             ${CMAKE_CURRENT_SOURCE_DIR}/StringHasher.cpp
             ${CMAKE_CURRENT_SOURCE_DIR}/VarSet.cpp
+            ${CMAKE_CURRENT_SOURCE_DIR}/VRMLObject.cpp
 )

tests/src/App/VRMLObject.cpp

@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+/***************************************************************************
+ *   Copyright (c) 2024 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+ *                                                                         *
+ *   This file is part of FreeCAD.                                         *
+ *                                                                         *
+ *   FreeCAD is free software: you can redistribute it and/or modify it    *
+ *   under the terms of the GNU Lesser General Public License as           *
+ *   published by the Free Software Foundation, either version 2.1 of the  *
+ *   License, or (at your option) any later version.                       *
+ *                                                                         *
+ *   FreeCAD is distributed in the hope that it will be useful, but        *
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of            *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      *
+ *   Lesser General Public License for more details.                       *
+ *                                                                         *
+ *   You should have received a copy of the GNU Lesser General Public      *
+ *   License along with FreeCAD. If not, see                               *
+ *   <https://www.gnu.org/licenses/>.                                      *
+ *                                                                         *
+ **************************************************************************/
+
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+
+#include <App/Application.h>
+#include <App/Document.h>
+#include <App/VRMLObject.h>
+#include <Base/FileInfo.h>
+#include <src/App/InitApplication.h>
+
+// NOLINTBEGIN
+
+class VRMLObjectTest: public ::testing::Test
+{
+protected:
+    static void SetUpTestSuite()
+    {
+        tests::initApplication();
+    }
+
+    void SetUp() override
+    {
+        document = App::GetApplication().openDocument(fileName().c_str());
+    }
+
+    void TearDown() override
+    {
+        if (document) {
+            App::GetApplication().closeDocument(document->getName());
+        }
+    }
+
+    std::string fileName() const
+    {
+        std::string resDir(DATADIR);
+        resDir.append("/tests/TestVRMLTextures.FCStd");
+        return resDir;
+    }
+
+    App::Document* getDocument() const
+    {
+        return document;
+    }
+
+private:
+    App::Document* document {};
+};
+
+TEST_F(VRMLObjectTest, loadVRMLWithTextures)
+{
+    App::Document* doc = getDocument();
+    ASSERT_TRUE(doc);
+
+    auto vrml = dynamic_cast<App::VRMLObject*>(doc->getActiveObject());
+    ASSERT_TRUE(vrml);
+
+    auto res = vrml->Resources.getValues();
+    EXPECT_EQ(res.size(), 6);
+    EXPECT_EQ(res[0], std::string("FreeCAD/FreeCAD1.png"));
+    EXPECT_EQ(res[1], std::string("FreeCAD/FreeCAD2.png"));
+    EXPECT_EQ(res[2], std::string("FreeCAD/FreeCAD3.png"));
+    EXPECT_EQ(res[3], std::string("FreeCAD/FreeCAD4.png"));
+    EXPECT_EQ(res[4], std::string("FreeCAD/FreeCAD5.png"));
+    EXPECT_EQ(res[5], std::string("FreeCAD/FreeCAD6.png"));
+
+    auto url = vrml->Urls.getValues();
+    EXPECT_EQ(url.size(), 6);
+    for (const auto& it : url) {
+        Base::FileInfo fi(it);
+        EXPECT_TRUE(fi.isFile());
+        EXPECT_TRUE(fi.exists());
+    }
+}
+
+// NOLINTEND