Nativescript-cli: test init messes up project

[PeterStaev]

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

[PeterStaev]

Not only that but after you run tns test init the project is left in a buggy state and you can't even run your project as it throws the same error (even after using ns clean):

➜  demo-test ns run android
Searching for devices...
Preparing project...
File change detected. Starting incremental webpack compilation...

webpack is watching the files…

Hash: 86c6aa4a5faf27c81052
Version: webpack 4.44.2
Time: 8598ms
Built at: 09/24/2020 11:56:41 PM
              Asset      Size   Chunks             Chunk Names
          bundle.js  28.2 KiB   bundle  [emitted]  bundle
       package.json  1.31 KiB           [emitted]  
         runtime.js  77.1 KiB  runtime  [emitted]  runtime
tns-java-classes.js   0 bytes           [emitted]  
          vendor.js  5.98 MiB   vendor  [emitted]  vendor
Entrypoint bundle = runtime.js vendor.js bundle.js
[../package.json] 1.19 KiB {bundle} [optional] [built]
[./ sync ^\.\/app\.(css|scss|less|sass)$] . sync nonrecursive ^\.\/app\.(css|scss|less|sass)$ 174 bytes {bundle} [built]
[./ sync recursive (?<!\bApp_Resources\b.*)(?<!\.\/\btests\b\/.*?)\.(xml|css|js|(?<!\.d\.)ts|(?<!\b_[\w-]*\.)scss)$] . sync (?<!\bApp_Resources\b.*)(?<!\.\/\btests\b\/.*?)\.(xml|css|js|(?<!\.d\.)ts|(?<!\b_[\w-]*\.)scss)$ 271 bytes {bundle} [built]
[./app-root.xml] 309 bytes {bundle} [optional] [built]
[./app.css] 1.84 KiB {bundle} [optional] [built]
[./main-page.ts] 1.36 KiB {bundle} [optional] [built]
[./main-page.xml] 1.87 KiB {bundle} [optional] [built]
[./main-view-model.ts] 1.04 KiB {bundle} [built]
[./main.ts] 2.19 KiB {bundle} [built]
    + 331 hidden modules
Webpack compilation complete. Watching for file changes.
Webpack build done!
Updating runtime package.json with configuration values...
Project successfully prepared (android)
Cannot use import statement outside a module

[PeterStaev]

Seems the problem is with @nativescript/unit-test-runner after prepare hook, which has import keyword and it fails. Replacing it with require seems to fix the problem:

const path = require("path");
const fs = require("fs");
// import * as path from "path";
// import * as fs from "fs";

[NathanWalker]

Thanks for this @PeterStaev we're shooting to wrap this up by Friday and will be running some tests with all latest changes.