Swiper incorrectly warns about a wrong number of slides for loop mode

[Mateusz Groth]

Check that this is really a bug

• I confirm

Reproduction link

https://codesandbox.io/p/devbox/swiper-react-infinite-loop-vfz433?file=%2Fsrc%2FApp.jsx

Bug description

If you attempt to render a basic loop swiper with any number of slides within jest tests the swiper warns about the incorrect number of slides when it shouldn't

The Swiper

import { Autoplay, Navigation, Pagination } from 'swiper/modules';
import { Swiper, SwiperSlide } from 'swiper/react';

const modules = [Navigation, Pagination, Autoplay];

export const App = () => {
  return (
    <Swiper
      loop
      slidesPerView={1}
      slidesPerGroup={1}
      loopAddBlankSlides
      modules={modules}
    >
      <SwiperSlide>test</SwiperSlide>
      <SwiperSlide>test</SwiperSlide>
      <SwiperSlide>test</SwiperSlide>
      <SwiperSlide>test</SwiperSlide>
      <SwiperSlide>test</SwiperSlide>
      <SwiperSlide>test</SwiperSlide>
    </Swiper>
  );
};

the test

import { render } from '@testing-library/react';

import { App } from './abc';

describe('App', () => {
  it('App', () => {
    render(<App />);
  });
});

Caution

Swiper Loop Warning: The number of slides is not enough for loop mode, it will be disabled and not function properly. You need to add more slides (or make duplicates) or lower the values of slidesPerView and slidesPerGroup parameters

Expected Behavior

No warning

Actual Behavior

Warning

Swiper version

11.1.4

Platform/Target and Browser Versions

macOS 14.5

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Make sure this is a Swiper issue and not a framework-specific issue

Would you like to open a PR for this bug?

• I'm willing to open a PR

[Mateusz Groth]

Added the bug to the Swiper element as I believe this is where the issue lays

[Mateusz Groth]

The 'slides' is an empty list in the loopFix method

[Mateusz Groth]

There is this loopCreate method that has initSlides. Shouldn't there be a

swiper.slides = slides

at the end?

like

  const initSlides = () => {
    const slides = elementChildren(slidesEl, `.${params.slideClass}, swiper-slide`);
    slides.forEach((el, index) => {
      el.setAttribute('data-swiper-slide-index', index);
    });
    swiper.slides = slides
  };

[Zhipeng Zeng]

have the same issue