Tests/LibGfx: Test we can decode everything in TinyVG

This tests that we can successfully parse the "everything" TVG files,
which make use of every feature in TinyVG.

Test files taken from https://github.com/TinyVG/examples (MIT).

Tests/LibGfx/TestImageDecoder.cpp

@@ -590,3 +590,20 @@ TEST_CASE(test_tvg)
 
     expect_single_frame_of_size(*plugin_decoder, { 1024, 1024 });
 }
+
+TEST_CASE(test_everything_tvg)
+{
+    Array file_names {
+        TEST_INPUT("tvg/everything.tvg"sv),
+        TEST_INPUT("tvg/everything-32.tvg"sv)
+    };
+
+    for (auto file_name : file_names) {
+        auto file = MUST(Core::MappedFile::map(file_name));
+        EXPECT(Gfx::TinyVGImageDecoderPlugin::sniff(file->bytes()));
+        auto plugin_decoder = MUST(Gfx::TinyVGImageDecoderPlugin::create(file->bytes()));
+        MUST(plugin_decoder->initialize());
+
+        expect_single_frame_of_size(*plugin_decoder, { 400, 768 });
+    }
+}