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reactjstypescriptjestjsts-jest

Jest complains about Typescript syntax

When I run yarn test Jest throws an error that says

'Const declarations' require an initialization value.

Which is not what I'm doing!

> 4 | const config: HardhatUserConfig = {
    |             ^
  5 |   solidity: "0.8.9",
  6 |   paths: {
  7 |     artifacts: "./src/artifects",

I think it is obvious that jest is having problem with TS syntax.
How can I fix that?

Solution

  • You need to use ts-jest.

    • Install ts-jest: npm install ts-jest -D
    • Update your jest config to use: preset: 'ts-jest'

    You still run your tests the same way - just run jest.