Fixes incorrect passing on of arguments when injected

Fixes #7.

Author: hlapp

index.js

@@ -57,8 +57,10 @@ REDstart.inject = function(RED, timeout) {
     RED.start = injectedStart;
     injected.set(RED, injectedStart);
 
+    /* eslint-disable no-invalid-this */
     // the function we will be injecting
     function injectedStart() {
-        return start(arguments).then(REDstart(RED, timeout));
+        return start.apply(this, arguments).then(REDstart(RED, timeout));
     }
+    /* eslint-enable no-invalid-this */
 };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "node-red-embedded-start",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "Enables waiting for flows to have started for embedded Node-RED applications",
   "main": "index.js",
   "scripts": {

test/02.js

@@ -1,6 +1,7 @@
 "use strict";
 
-var test = require('tape');
+var test = require('tape'),
+    sinon = require('sinon');
 var path = require('path');
 var embeddedStart = require('../');
 
@@ -87,3 +88,28 @@ test('can inject wait into RED.start()', function(t) {
         return prom;
     }).catch(failAndEnd(t));
 });
+
+test('arguments with which RED.start() is called are passed on', function(t) {
+    t.plan(5);
+
+    let stub = sinon.stub(RED, "start");
+    stub.returns(Promise.resolve(42));
+
+    embeddedStart.inject(RED);
+    RED.start("one").then((result) => {
+        t.equal(result, 42, 'passes on to the stub we presented');
+        let call = stub.getCall(0);
+        t.deepEqual(call.args, ["one"], 'correctly passes through one argument');
+        t.equal(call.thisValue, RED, '"this" is set to RED');
+        return RED.start("one", "two", "three");
+    }).then(() => {
+        let call = stub.getCall(1);
+        t.deepEqual(call.args, ["one", "two", "three"],
+             'correctly passes through multiple arguments');
+        t.equal(call.thisValue, RED, '"this" is set to RED');
+        RED.start.restore();
+    }).catch((err) => {
+        RED.start.restore();
+        failAndEnd(t)(err);
+    });
+});