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add global mock for the matchMedia function

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Signed-off-by: Augustin Husson <husson.augustin@gmail.com>
This commit is contained in:
Augustin Husson 2021-09-08 17:24:54 +02:00
parent 2cfdaf915f
commit e1d8891a73
2 changed files with 17 additions and 1 deletions
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2
web/ui/react-app/src/hooks/useMedia.ts
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@ -9,7 +9,7 @@ const useMedia = (query: string): boolean => {
const handler = () => setMatches(mediaQuery.matches);
mediaQuery.addEventListener('change', handler);
return () => mediaQuery.removeEventListener('change', handler);
}, []);
}, [mediaQuery]);
return matches;
};

16
web/ui/react-app/src/setupTests.ts
View File

@ -10,6 +10,22 @@ const customGlobal: GlobalWithFetchMock = global as GlobalWithFetchMock;
customGlobal.fetch = require('jest-fetch-mock');
customGlobal.fetchMock = customGlobal.fetch;
// https://stackoverflow.com/questions/39830580/jest-test-fails-typeerror-window-matchmedia-is-not-a-function
// https://jestjs.io/docs/manual-mocks#mocking-methods-which-are-not-implemented-in-jsdom
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(),
})),
});
// CodeMirror in the expression input requires this DOM API. When we upgrade react-scripts
// and the associated Jest deps, hopefully this won't be needed anymore.
document.getSelection = function () {