Add testing support

package.json

@@ -9,7 +9,8 @@
   "private": false,
   "scripts": {
     "build": "tsc --project tsconfig.json",
-    "start": "node lib/app.js"
+    "start": "node lib/app.js",
+    "test": "mocha -r ts-node/register tests/**/*.ts"
   },
   "dependencies": {
     "@octokit/rest": "^16.28.7",
@@ -26,15 +27,19 @@
     "yaml": "^1.6.0"
   },
   "devDependencies": {
+    "@types/chai": "^4.1.7",
     "@types/express": "^4.17.0",
     "@types/ioredis": "^4.0.13",
     "@types/markdown-it": "^0.0.8",
     "@types/micromatch": "^3.1.0",
     "@types/mime": "^2.0.1",
+    "@types/mocha": "^5.2.7",
     "@types/node": "^12.6.9",
     "@types/node-emoji": "^1.8.1",
     "@types/request-promise-native": "^1.0.16",
     "@types/yaml": "^1.0.2",
+    "chai": "^4.2.0",
+    "ts-node": "^8.3.0",
     "typescript": "^3.5.3"
   }
 }

tsconfig.json

@@ -25,5 +25,8 @@
     "inlineSources": true,
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
-  }
+  },
+  "exclude": [
+      "tests/**/*"
+  ]
 }