idea

Mocha

Install ts-node.

In require:

    "test": "mocha --require ts-node/register test/**/*.test.ts"

Install extension "Mocha Test Explorer". Configure, and in settings.json, add:

  "mochaExplorer.files": "test/**/*.ts",
  "mochaExplorer.require": "ts-node/register"

Debug

Add a .vscode/launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "node",
      "request": "launch",
      "name": "Launch Program",
      "skipFiles": [
        "<node_internals>/**"
      ],
      "program": "${workspaceFolder}\\src\\index.ts",
      "outFiles": [
        "${workspaceFolder}/dist/**/*.js"
      ]
    }
  ]
}

Make sure that sourceMap is true in the tsconfig