TEST(Imgcodecs_APNG, imencode_imdecode_animation)
{
    Animation gt_animation, mem_animation;
    EXPECT_TRUE(fillFrames(gt_animation, true));

    std::vector<unsigned char> buf;
    EXPECT_TRUE(imencodeanimation(".png", gt_animation, buf));
    EXPECT_TRUE(imdecodeanimation(buf, mem_animation));

    // Since the last frames are identical, APNG encoder optimizes by storing only one of them,
    // and the duration value for the last frame is calculated by APNG encoder.
    EXPECT_EQ(mem_animation.frames.size(), gt_animation.frames.size() - 2);
    EXPECT_EQ(mem_animation.bgcolor, gt_animation.bgcolor);
    EXPECT_EQ(mem_animation.loop_count, gt_animation.loop_count);
    for (size_t i = 0; i < mem_animation.frames.size() - 1; i++)
    {
        EXPECT_EQ(0, cvtest::norm(mem_animation.frames[i], gt_animation.frames[i], NORM_INF));
        EXPECT_EQ(mem_animation.durations[i], gt_animation.durations[i]);
    }
}