Tests: Add a test for JPEGs with RGB components

Author: https://github.com/LucasChollet
Commit: https://github.com/SerenityOS/serenity/commit/af58f012be
Pull-request: https://github.com/SerenityOS/serenity/pull/17720
Reviewed-by: https://github.com/nico ✅

Tests/LibGfx/TestImageDecoder.cpp

@@ -112,6 +112,17 @@ TEST_CASE(test_jpeg_sof0_several_scans)
     EXPECT_EQ(frame.image->size(), Gfx::IntSize(592, 800));
 }
 
+TEST_CASE(test_jpeg_rgb_components)
+{
+    auto file = MUST(Core::MappedFile::map(TEST_INPUT("rgb_components.jpg"sv)));
+    EXPECT(Gfx::JPEGImageDecoderPlugin::sniff(file->bytes()));
+    auto plugin_decoder = MUST(Gfx::JPEGImageDecoderPlugin::create(file->bytes()));
+    EXPECT(plugin_decoder->initialize());
+
+    auto frame = MUST(plugin_decoder->frame(0));
+    EXPECT_EQ(frame.image->size(), Gfx::IntSize(592, 800));
+}
+
 TEST_CASE(test_jpeg_sof2_spectral_selection)
 {
     auto file = MUST(Core::MappedFile::map(TEST_INPUT("spectral_selection.jpg"sv)));