Make npm test run tests

package.json

@@ -14,13 +14,15 @@
     "prepublish": "npm run clean && npm run compile",
     "test": "npm run compile && npm run lint && atom --test build/test"
   },
+  "atomTestRunner": "./test/runner",
   "dependencies": {
     "fuzzaldrin-plus": "^0.6.0",
     "vscode-jsonrpc": "4.0.0",
     "vscode-languageserver-protocol": "3.12.0",
     "vscode-languageserver-types": "3.12.0"
   },
   "devDependencies": {
+    "@smashwilson/atom-mocha-test-runner": "^1.4.0",
     "@types/atom": "^1.31.0",
     "@types/chai": "^4.1.7",
     "@types/fuzzaldrin-plus": "0.6.0",

test/runner.js

@@ -0,0 +1,14 @@
+const { TestRunnerParams } = require("atom");
+const { createRunner } = require('@smashwilson/atom-mocha-test-runner');
+
+module.exports = createRunner({
+    htmlTitle: `atom-languageclient Tests - pid ${process.pid}`,
+    reporter: process.env.MOCHA_REPORTER || 'list',
+  },
+  (mocha) => {
+    mocha.timeout(parseInt(process.env.MOCHA_TIMEOUT || '5000', 10));
+    if (process.env.APPVEYOR_API_URL) {
+      mocha.reporter(require('mocha-appveyor-reporter'));
+    }
+  },
+);