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jest.config.js
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jest.config.js
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// jest.config.js
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: "./",
});
// Add any custom config to be passed to Jest
const customJestConfig = {
// Add more setup options before each test is run
// setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
// if using TypeScript with a baseUrl set to the root directory then you need the below for alias' to work
moduleDirectories: ["node_modules", "<rootDir>/"],
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 = createJestConfig(customJestConfig);
module.exports = {
collectCoverage: true,
// on node 14.x coverage provider v8 offers good speed and more or less good report
coverageProvider: "v8",
collectCoverageFrom: [
"**/*.{js,jsx,ts,tsx}",
"!**/*.d.ts",
"!**/node_modules/**",
"!<rootDir>/out/**",
"!<rootDir>/.next/**",
"!<rootDir>/*.config.js",
"!<rootDir>/coverage/**",
],
moduleNameMapper: {
// Handle CSS imports (with CSS modules)
// https://jestjs.io/docs/webpack#mocking-css-modules
"^.+\\.module\\.(css|sass|scss)$": "identity-obj-proxy",
// Handle CSS imports (without CSS modules)
"^.+\\.(css|sass|scss)$": "<rootDir>/__mocks__/styleMock.js",
// Handle image imports
// https://jestjs.io/docs/webpack#handling-static-assets
"^.+\\.(png|jpg|jpeg|gif|webp|avif|ico|bmp|svg)$/i": `<rootDir>/__mocks__/fileMock.js`,
// Handle module aliases
"^@/components/(.*)$": "<rootDir>/components/$1",
},
// Add more setup options before each test is run
// setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
testPathIgnorePatterns: ["<rootDir>/node_modules/", "<rootDir>/.next/"],
testEnvironment: "jsdom",
transform: {
// Use babel-jest to transpile tests with the next/babel preset
// https://jestjs.io/docs/configuration#transform-objectstring-pathtotransformer--pathtotransformer-object
"^.+\\.(js|jsx|ts|tsx)$": ["babel-jest", { presets: ["next/babel"] }],
},
transformIgnorePatterns: [
"/node_modules/",
"^.+\\.module\\.(css|sass|scss)$",
],
};