test init messes up project

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):
✔ Getting NativeScript components versions information...
✔ Component nativescript has 7.0.8 version and is up to date.
✔ Component @nativescript/core has 7.0.3 version and is up to date.
✔ Component @nativescript/ios has 7.0.0 version and is up to date.
✖ Component @nativescript/android is not installed.

Describe the bug
Trying to run unit tests fails with the following error:

Error: Cannot use import statement outside a module
    at Errors.failWithOptions (/usr/local/lib/node_modules/nativescript/lib/common/errors.js:157:27)
    at Errors.fail (/usr/local/lib/node_modules/nativescript/lib/common/errors.js:130:21)
    at DevicesService.<anonymous> (/usr/local/lib/node_modules/nativescript/lib/common/mobile/mobile-core/devices-service.js:425:30)
    at Generator.throw (<anonymous>)
    at rejected (/usr/local/lib/node_modules/nativescript/lib/common/mobile/mobile-core/devices-service.js:12:65)
    at processTicksAndRejections (internal/process/task_queues.js:97:5) {
  name: 'Exception',
  errorCode: 127,
  suggestCommandHelp: false,
  proxyAuthenticationRequired: false,
  printOnStdout: undefined
}

To Reproduce

tns create demo-test --tsc
tns test init #select mocha
tns test ios

Expected behavior
Tests to run.

Sample project

Additional context

使用 tns create demo-test --tsc、tns test init 和 tns test ios 重現失敗，然後檢查 lib/common/mobile/mobile-core/devices-service.js 中回報的 CLI 路徑。追蹤 Mocha 測試設定的初始化方式，並判斷必須進行哪些變更，才能讓產生的 TypeScript 專案在沒有匯入錯誤的情況下執行其 iOS 測試。