Config Jest on ViteJS — Just edit transform property. Source: https://www.youtube.com/watch?v=edXudaVB0Bg&ab_channel=Rocketseat

jest.config.ts

...
transform: {
  '^.+\\.(t|j)sx?$': [
    '@swc/jest',
    {
      jsc: {
        parser: {
          syntax: 'typescript',
          tsx: true,
          decorators: true,
        },
        keepClassNames: true,
        transform: {
          legacyDecorator: true,
          decoratorMetadata: true,
          react: {
            runtime: 'automatic',
          },
        },
      },
      module: {
        type: 'es6',
        noInterop: false,
      },
    },
  ],
},
...

npm

npm i -D jest @types/jest ts-node