使用TestCafe测试react-select下拉框失效，求问题排查

Let’s break down what’s going wrong with your TestCafe test for react-select, and fix it step by step.

Key Issues in Your Code #

1. Wrong DOM Element Assumptions
   react-select doesn’t render native <option> elements—it uses a custom DOM structure with classes like customSelect__control (the clickable trigger to open the dropdown) and customSelect__option (the individual dropdown items). Trying to target <option> will never work here.

2. Syntax & Logic Errors in dropDownValueSelector
   Your function has several critical bugs:

• You reference a customSelect variable that’s never defined
• The chain await t.click(customSelect).find(...) is invalid—find is a selector method, not an action you can chain off a TestCafe click
• There’s an extra closing }); at the end that breaks syntax
• You’re targeting .customSelect__input, which is irrelevant here since your component has isSearchable={false} (this element won’t exist or serve any purpose)

3. Inaccurate Selector Targeting
   While you pass the id="#my-dropdown" prop to react-select, you need to ensure you’re clicking the actual interactive control element that opens the dropdown—not just the root element directly (though the root might map to the control, being explicit with react-select’s class is more reliable).

Fixed Solution #

Here’s the corrected dropDownValueSelector function, tailored to react-select’s actual DOM structure:

import { Selector } from 'testcafe';

export default async (t, { selector, newValue }) => {
  // Target the clickable control element of react-select
  const selectControl = Selector(selector).find('.customSelect__control');
  
  // Click to open the dropdown menu
  await t.click(selectControl);
  
  // Locate the target option using react-select's custom option class
  const targetOption = Selector('.customSelect__option').withText(newValue);
  
  // Wait for the option to become visible (handles async rendering delays)
  await t.expect(targetOption.exists).ok();
  
  // Click the option to select it
  await t.click(targetOption);
};

Additional Checks to Ensure Success #

• Verify your custom Select component correctly passes the id prop to the underlying react-select. The react-select component should render the id on its root control element (the one with customSelect__control class), so your #my-dropdown selector will find it.
• If your options load asynchronously (e.g., from an API), add an extra wait for the menu to render, or use await t.expect(Selector('.customSelect__menu').exists).ok() before targeting the option.
• Ensure newValue exactly matches the displayed text in the option—withText is case-sensitive by default. Use withText(new RegExp(newValue, 'i')) if you need case-insensitive matching.

Revised Test Case #

Your test case itself is structured correctly, but here it is for reference:

test('DropDown test', async t => {
  await dropdownValueSelector(t, { selector: '#my-dropdown', newValue: 'value 2' });
});

内容的提问来源于stack exchange，提问作者Sunny