vitest.setup.ts

/**
 * Setup for the DOM test project (vitest.config.mts -> "dom").
 * jsdom does not implement the browser APIs React and the charting library
 * expect, so they are stubbed here.
 */
import { afterEach } from "vitest";
import { cleanup } from "@testing-library/react";

afterEach(() => {
  cleanup();
});

if (typeof window !== "undefined") {
  if (!window.matchMedia) {
    window.matchMedia = ((query: string) => ({
      matches: false,
      media: query,
      onchange: null,
      addListener: () => {},
      removeListener: () => {},
      addEventListener: () => {},
      removeEventListener: () => {},
      dispatchEvent: () => false,
    })) as unknown as typeof window.matchMedia;
  }

  if (!("ResizeObserver" in window)) {
    class ResizeObserverStub {
      observe(): void {}
      unobserve(): void {}
      disconnect(): void {}
    }
    (window as unknown as { ResizeObserver: unknown }).ResizeObserver = ResizeObserverStub;
    (globalThis as unknown as { ResizeObserver: unknown }).ResizeObserver = ResizeObserverStub;
  }

  if (!("IntersectionObserver" in window)) {
    class IntersectionObserverStub {
      readonly root = null;
      readonly rootMargin = "";
      readonly thresholds: readonly number[] = [];
      observe(): void {}
      unobserve(): void {}
      disconnect(): void {}
      takeRecords(): [] {
        return [];
      }
    }
    (window as unknown as { IntersectionObserver: unknown }).IntersectionObserver = IntersectionObserverStub;
    (globalThis as unknown as { IntersectionObserver: unknown }).IntersectionObserver = IntersectionObserverStub;
  }
}