完善的函数仅在测试套件中抛出错误,在实际中不会抛出错误 app/browser

polished function throws error only in test suite, not in actual app/browser

我有一个按钮,它使用来自 polished (styled-componenents) 的 lighten 助手。我像这样在悬停时调用它:

FAB.styles.tsx

&:hover,
&:focus {
    * {
      cursor: pointer;
    }

    background: ${(props) => lighten(0.1, props.theme.primary)};
    transition: background 0.25s;
}

没有错误,完全按预期工作。

当我尝试测试该组件时,出现以下错误:

    Passed an incorrect argument to a color function, please pass a string representation of a color.

      41 |     }
      42 |
    > 43 |     background: ${(props) => lighten(0.1, props.theme.primary)} !important;

为什么在浏览器中没有抛出此类错误时只在此处抛出错误?

答案是将您的测试包装在 ThemeProvider 中。您可以使用自定义呈现方法来执行此操作,类似于他们在 testing-library docs on setup.

中显示的方法
const Wrapper = ({ children }: any) => {
  return <ThemeProvider theme={theme}>{children}</ThemeProvider>;
};

export const customRender = (
  ui: ReactElement,
  options?: Omit<RenderOptions, "wrapper">
) => render(ui, { wrapper: Wrapper, ...options });

export * from "@testing-library/react";
it("renders something", () => {
    customRender(<Component />);
    const linkElement = screen.getByTitle(/Work with us/i);
    expect(linkElement).toBeInTheDocument();
});

感谢 polished/styled-components 的维护者之一 Brian Hough 的帮助,我找到了答案。你可以看到我们的帖子 here.