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[Bug]: "Element type is invalid" when testing Line chart with react testing library #1218

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@lukecoursey

Description

Current and expected behavior

Calling render() with a component that uses a Line chart fails with the message:

Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.
Check the render method of `TestChart`.

The exact same test using a Bar chart instead of a Line chart passes with no errors. The charts render fine, the error only appears during unit testing.

Example component:

import { Line } from 'react-chartjs-2';
const TestChart = () => {
 const chartData = {
 labels: [2010, 2011, 2012, 2013],
 datasets: [
 {
 label: 'All Species',
 data: [1, 5, 10, 20],
 borderColor: '#009344',
 backgroundColor: '#009344'
 }
 ]
 };
 return <Line data={chartData} />;
};
export default TestChart;

And example test:

import { render } from '@testing-library/react';
import TestChart from '../components/TestChart';
describe('TestChart.tsx', () => {
 it('should render', () => {
 const component = render(<TestChart />);
 expect(component).toBeTruthy();
 });
});

Reproduction

Repro examples provided above

chart.js version

v4.4.0

react-chartjs-2 version

v5.2.0

Possible solution

No response

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