打字稿，玩笑：SyntaxError：无法在模块外部使用import语句

Question

基本上，我开始研究测试，并且我正在尝试测试一个函数，以检查一个值是否在笑话中为Class类型。

我的isClass.spec.ts ：

import { isClass, ClassType } from './isClass';

describe('Verify if parameter is typeof class', () => {
  it('Expect true when value is typeof class or false if not typeof class', () => {
    class test {}
    const result = isClass(new test());
    expect();
  });
})

我的isClass.ts

export type ClassType = { new (...args: any[]): any };

export const isClass = (object: any): object is ClassType => {
  return object;
};

我的纱线测试中出现此错误：

Jest encountered an unexpected token

    This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.

    By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".
 Details:

    /home/spirit/Documentos/spt-bootstrapApp/src/utils/isClass.spec.ts:1
    import { isClass, ClassType } from './isClass';
    ^^^^^^

    SyntaxError: Cannot use import statement outside a module

      at Runtime._execModule (node_modules/jest-runtime/build/index.js:1179:56)

我的jest.config.js：

const { compilerOptions } = require('./tsconfig.json');
const { pathsToModuleNameMapper } = require('ts-jest/utils');

module.exports = {
  clearMocks: true,
  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, {
    prefix: '<rootDir>',
  }),
  preset: 'ts-jest',
  testEnvironment: 'node',
};