Help Configuring Expo 52 with Jest and @testing-library/react-native to Test Elements with expect().toHaveStyle
@danstepanov 已经在做这个了。
开始于 2026年4月15日。
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描述
Hi there! 👋🏾
I’m currently working on a project with Expo 52 and trying to set up Jest testing with @testing-library/react-native. Everything works fine in development and production, but I’m having trouble running tests that involve NativeWind styles.
In my tests, I’m trying to use expect(text).toHaveStyle() to check if the styles are being applied correctly, but it's not working in the test environment.
I’ve already followed the steps in the documentation, but I’m still facing issues with applying styles during tests.
Example Code
I have the following code using useColorScheme():
import * as React from "react";
import { Text, View } from "react-native";
import { render } from "@testing-library/react-native";
const BlackViewWhiteText = () => {
return (
<View
testID="black-view"
className="bg-black flex-1 justify-center items-center"
>
<Text className="text-white">white text</Text>
</View>
);
};
it("should correct styles for black background and white text using NativeWind", () => {
const { getByText, toJSON, getByTestId } = render(<BlackViewWhiteText />);
const text = getByText("white text");
const view = getByTestId("black-view");
expect(toJSON()).toMatchSnapshot();
expect(text).toHaveProp("className");
expect(view).toHaveStyle({ color: "black" }); // same rgb(0,0,0)
expect(text).toHaveStyle({ color: "white" }); // same rgb(255,255,255)
/* expect(element).toHaveStyle()
- Expected
+ Received
- color: black;
*/
});
However, the test is not behaving as expected when it comes to checking styles, especially with the NativeWind utilities. I would appreciate any help on how to properly configure Expo 52 with Jest and @testing-library/react-native to make these tests pass.
It would also be great to have an example of the Jest configuration and how to test the useColorScheme changing dark mode.
Thanks in advance for your help!
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