jest_config.json

  "jest": {
    "preset": "ts-jest",
    "testEnvironment": "jest-environment-jsdom",
    "snapshotSerializers": [
      "enzyme-to-json/serializer"
    ],
    "collectCoverageFrom": [
      "src/**/*.{ts,tsx}"
    ],
    "globals": {
      "ts-jest": {
        "tsconfig": "tsconfig.json"
      },
      "window": {}
    },
    "testMatch": [
      "**/__tests__/**/*.[jt]s?(x)"
    ],
    "moduleNameMapper": {
      "\\.(css|less|scss|svg)$": "identity-obj-proxy"
    },
    "transform": {
      "\\.tsx?$": "ts-jest",
      "\\.jsx?$": "babel-jest"
    },
    "setupFilesAfterEnv": [
      "<rootDir>/src/setupTests.ts"
    ]
  },