使用 tsyringe @injectable 时获得对装饰器错误的实验性支持

Question

I'm using tsyringe for dependency injection and trying to run unit tests. The class is in ts and the test file is in js. When I try to run my tests by executing TS_NODE_PROJECT=\"tsconfig.testing.json\" mocha -r ts-node/register src/**/*.test.js I get the following compilation error:

repo.ts:27:14 - error TS1219: Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option in your 'tsconfig' or 'jsconfig' to remove this warning.

Here is my code.

// repo.ts
@injectable()
export class Repo {

  testAdd = (a, b) => {
    return a + b;
  };
}

// repo.test.js
const { Repo } = require("../repo");
const expect = require("chai").expect;

describe("testing the add function", () => {
  it("addition worked correctly", (done) => {
    const r = new Repo();
    const res = r.testAdd(4, 5);
    expect(res).to.equal(9);
    done();
  });
});

// tsconfig.json
{
  "compilerOptions": {
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "module": "commonjs",
    "noImplicitReturns": false,
    "noUnusedLocals": false,
    "outDir": "lib",
    "sourceMap": true,
    "strict": false,
    "target": "es2017"
  },
  "compileOnSave": true,
  "include": ["src"]
}

// tsconfig.testing.json
{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es6"
  },
  "include": ["**/*.spec.ts"]
}

If I get rid of the injectable() decorator then the tests work. If I change the test ext from js to ts, then it works. I tried creating a jsconfig.json and adding in

 "experimentalDecorators": true,
 "emitDecoratorMetadata": true,

but it didn't help.

What am I doing wrong?

Answer 1

Update, I think the issue is that I needed to add the

"experimentalDecorators": true,
"emitDecoratorMetadata": true,

in the tsconfig.testing.json file as well. So far looks to be working with the.js testing files.