I'm using React and Typescript.
In my test file I try to render a component
test("Render Header", () => { render(<Header />); });
The header component is using the action creator from actions.tsx
import { loadRepo } from "../../redux/actions"; dispatch(loadRepo());
loadRepo is an asynchronous operation creator using axios. My test throws an error because I imported axios in actions.tsx. The error is as follows: The import statement cannot be used outside the module.
I tried setting up babel and jest configurations. This is what I have.
babel.config.js
module.exports = { presets: [["@babel/preset-env", { targets: { node: "current" } }], "@babel/preset-react", "@babel/preset-typescript"], plugins: [], };
jest.config.js
module.exports = { setupFilesAfterEnv: ["@testing-library/jest-dom/extend-expect"], moduleNameMapper: { "\.(css|less|scss|sass)$": "identity-obj-proxy", }, transform: { "^.+\.(js|jsx|ts|tsx)$": "babel-jest", }, };
package.json
"dependencies": { "@testing-library/user-event": "^13.5.0", "@types/node": "^16.18.23", "@types/react": "^18.0.35", "@types/react-dom": "^18.0.11", "axios": "^1.3.5", "bootstrap": "^5.2.3", "react": "^18.2.0", "react-bootstrap": "^2.7.3", "react-dom": "^18.2.0", "react-redux": "^8.0.5", "react-scripts": "5.0.1", "redux": "^4.2.1", "redux-thunk": "^2.4.2", "typescript": "^4.9.5", "web-vitals": "^2.1.4" }, "scripts": { "start": "react-scripts start", "build": "react-scripts build", "test": "react-scripts test", "eject": "react-scripts eject" }, "devDependencies": { "@babel/core": "^7.21.4", "@babel/preset-env": "^7.21.4", "@babel/preset-react": "^7.18.6", "@babel/preset-typescript": "^7.21.4", "@testing-library/jest-dom": "^5.16.5", "@testing-library/react": "^14.0.0", "babel-jest": "^29.5.0", "jest": "^27.5.1" }
I was able to fix this error by adding the following code to package.json to force jest to import the commonjs axios build