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jest.config.js
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const nextJest = require("next/jest");
const createJestConfig = nextJest({
// Provide the path to your Next.js app to load next.config.js and .env files in your test environment
dir: "./",
});
/** @type {import('jest').Config} */
const customJestConfig = {
setupFilesAfterEnv: ["<rootDir>/jest.setup.js"],
moduleNameMapper: {
"^components/(.*)$": "<rootDir>/src/components/$1",
"^data/(.*)$": "<rootDir>/src/data/$1",
"^types/(.*)$": "<rootDir>/src/types/$1",
"^theme/(.*)$": "<rootDir>/src/theme/$1",
"^slices/(.*)$": "<rootDir>/src/slices/$1",
"^store/(.*)$": "<rootDir>/src/store/$1",
"^utils/(.*)$": "<rootDir>/src/utils/$1",
"^contexts/(.*)$": "<rootDir>/src/contexts/$1",
"^helpers/(.*)$": "<rootDir>/src/helpers/$1",
"^pages/(.*)$": "<rootDir>/src/pages/$1",
"^graphql/(.*)$": "<rootDir>/src/graphql/$1",
"^uuid$": require.resolve("uuid"),
},
testEnvironment: "jest-environment-jsdom",
};
// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
module.exports = async () => ({
/**
* Using ...(await createJestConfig(customJestConfig)()) to override transformIgnorePatterns
* provided byt next/jest.
*
* @link https://github.com/vercel/next.js/issues/36077#issuecomment-1096635363
*/
...(await createJestConfig(customJestConfig)()),
/**
* Swiper use ECMAScript Modules (ESM) and Jest provides some experimental support for it
* but "node_modules" are not transpiled by next/jest yet.
*
* The "transformIgnorePatterns" on "jest.config.js" prevents the Swiper files from being
* transformed by Jest but it affects the CSS files that are provided by this package.
* Mocking these CSS files is the solution that demands the smallest configuration.
*
* @link https://github.com/vercel/next.js/issues/36077#issuecomment-1096698456
* @link https://jestjs.io/docs/ecmascript-modules
*/
transformIgnorePatterns: ["node_modules/(?!(swiper|ssr-window|dom7)/)"],
verbose: true,
});