text: // @ts-check
  const { test, expect } = require('@playwright/test');
  
  test.beforeEach(async ({page}) => {
    await page.addInitScript(() => {
      class FileSystemFileHandleMock {
        constructor(file) {
          this._file = file;
        }
  
        async getFile() {
          return this._file;
        }
      }
      window.showOpenFilePicker = async () => [new FileSystemFileHandleMock(new File(['Test content.'], "foo.txt"))];
    });
  });
  
  test('show file picker with mock class', async ({ page }) => {
    await page.goto('/file-picker.html');
    await page.locator('button', { hasText: 'Open File' }).click();
    // Check that the content of the mock file has been loaded.
    await expect(page.locator('textarea')).toHaveValue('Test content.');
  });
  