Test: ESLint support for TypeScript

[dbaeumer]

Tests microsoft/vscode-eslint#802

• anyOS @isidorn
• anyOS @sana-ajani

Complexity: 3

The ESLint extension now has better support for TypeScript. Test that this is working as expected if a workspace is setup correctly for eslint usage.

Prerequisite

Install the latest version of the ESLint extension from here: https://github.com/microsoft/vscode-eslint/releases/tag/2.0.1-next.1

Setup

• create a new workspace folder
• add eslint to it
• add typescript to it.
• add the typescript parser to it: "@typescript-eslint/parser
• create a .eslintrc.json file and configure the typescript parse

	"parser": "@typescript-eslint/parser",
	"parserOptions": {
		"ecmaVersion": 6,
		"sourceType": "module"
	}

• create a TypeScript file

A blueprint repository can be found here: https://github.com/microsoft/vscode-eslint/tree/2.0.1-next.1/playgrounds/ts

Ensure the following:

• the TypeScript file is validated correctly
• for workspace that don't have TypeScript support enabled for eslint no error messages are shown and no Output panels pop to the front.

Please report issues here: https://github.com/microsoft/vscode-eslint/issues

[isidorn]

Works nicely. I also set it up for our VS Code repo. I tested on macOS.