[Fixes #14] Merge array of route paths

lib/index.js

@@ -23,6 +23,10 @@ module.exports = function (options) {
 		if (str instanceof RegExp) {
 			str = str.toString();
 		}
+
+		if (Array.isArray(str)) {
+			str = str.join(',')
+		}
 
 		return str && str.replace(REGEX_PIPE, DELIM);
 	}

lib/index.test.js

@@ -183,6 +183,22 @@ describe('connectDatadog', () => {
           await asyncConnectDatadogAndCallMiddleware({ response_code: true, path })
           expectConnectedToDatadog(stat, statTags, false)
         })
+
+        describe('when the path is an array of paths', () => {
+          it('should append the joined path to the metric tag', async () => {
+            req.route.path = ['/some/path', '/array/of/paths']
+            const path = true
+            const stat = 'node.express.router'
+            const statTags = [
+              `route:${req.route.path}`,
+              `response_code:${res.statusCode}`,
+              `path:${req.path}`,
+            ]
+
+            await asyncConnectDatadogAndCallMiddleware({ response_code: true, path })
+            expectConnectedToDatadog(stat, statTags, false)
+          })
+        })
       })
 
       describe('when the path option is falsy', () => {