fix(wrap): Extensions functions.handler -> eventType key exists but is undefined value (#49)

Author: Salakar

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-- '6.14.0'
 - '8'
+- '10'
 - stable
 sudo: false

package.json

@@ -34,15 +34,15 @@
     "lodash": "^4.17.5"
   },
   "devDependencies": {
-    "@types/chai": "^4.1.2",
-    "@types/mocha": "^5.0.0",
-    "chai": "^4.1.2",
-    "firebase-admin": "~6.1.0",
-    "firebase-functions": "^2.1.0",
-    "mocha": "^5.0.5",
-    "sinon": "^4.4.9",
-    "tslint": "^5.8.0",
-    "typescript": "^2.4.1"
+    "@types/chai": "~4.2.4",
+    "@types/mocha": "^5.2.7",
+    "chai": "^4.2.0",
+    "firebase-admin": "~8.6.1",
+    "firebase-functions": "^3.3.0",
+    "mocha": "^6.2.2",
+    "sinon": "^7.5.0",
+    "tslint": "^5.20.0",
+    "typescript": "^3.6.4"
   },
   "peerDependencies": {
     "firebase-functions": ">1.0.1",

src/main.ts

@@ -111,7 +111,7 @@ export function wrap<T>(cloudFunction: CloudFunction<T>): WrappedFunction {
           params: {},
       };
 
-      if (has(defaultContext, 'eventType') &&
+      if (has(defaultContext, 'eventType') && defaultContext.eventType !== undefined &&
         defaultContext.eventType.match(/firebase.database/)) {
         defaultContext.authType = 'UNAUTHENTICATED';
         defaultContext.auth = null;