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fix: mock window.matchMedia for Jest tests #450

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merged 1 commit into from
May 26, 2025
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fix: mock window.matchMedia for Jest tests #450

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15 changes: 15 additions & 0 deletions jest.setup.js
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,21 @@ if (!global.TextDecoder) {
global.TextDecoder = TextDecoder;
}

// window.matchMedia doesn't exist in test environment
Object.defineProperty(window, 'matchMedia', {
writable: true,
value: jest.fn().mockImplementation(query => ({
matches: false,
media: query,
onchange: null,
addListener: jest.fn(), // deprecated
removeListener: jest.fn(), // deprecated
addEventListener: jest.fn(),
removeEventListener: jest.fn(),
dispatchEvent: jest.fn(),
})),
});

global.React = React;

const savedLocation = window.location;
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