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jest.config.js
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jest.config.js
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const transformIgnoreModules = ["nanoid"].join("|");
module.exports = {
collectCoverage: true,
// on node 14.x coverage provider v8 offers good speed and more or less good report
coverageProvider: 'v8',
collectCoverageFrom: [
'<rootDir>/src/**/*.{js,jsx,ts,tsx}',
// Ignore files directly in app dir
'!<rootDir>/src/app/*.{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)$/i': `<rootDir>/__mocks__/fileMock.js`,
// Handle module aliases
'^@/app/(.*)$': '<rootDir>/src/app/$1',
'^@/components/(.*)$': '<rootDir>/src/components/$1',
'^@/db/(.*)$': '<rootDir>/src/db/$1',
'^@/lib/(.*)$': '<rootDir>/src/lib/$1',
// ES module imports
'^nanoid(/(.*)|$)': 'nanoid$1',
},
// Add more setup options before each test is run
setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
testPathIgnorePatterns: ['<rootDir>/node_modules/', '<rootDir>/.next/'],
testEnvironment: 'jsdom',
transform: {
// Use babel-jest to transpile tests with the next/babel preset
// https://jestjs.io/docs/configuration#transform-objectstring-pathtotransformer--pathtotransformer-object
'^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }],
},
transformIgnorePatterns: [
'/node_modules/',
'^.+\\.module\\.(css|sass|scss)$',
`/node_modules/(?!${transformIgnoreModules})`
],
modulePathIgnorePatterns: ["<rootDir>/src/types"]
}