Add deprecation tests (and fix lint error)

Author: simonbrunel

src/core/core.helpers.js

@@ -5,7 +5,6 @@
 var color = require('chartjs-color');
 var defaults = require('./core.defaults');
 var helpers = require('../helpers/index');
-var scaleService = require('../core/core.scaleService');
 
 module.exports = function() {
 

test/specs/global.deprecations.tests.js

@@ -42,6 +42,18 @@ describe('Deprecations', function() {
 				expect(Chart.types).toEqual({});
 			});
 		});
+
+		describe('Chart.helpers.configMerge', function() {
+			it('should be defined as a function', function() {
+				expect(typeof Chart.helpers.configMerge).toBe('function');
+			});
+		});
+
+		describe('Chart.helpers.scaleMerge', function() {
+			it('should be defined as a function', function() {
+				expect(typeof Chart.helpers.scaleMerge).toBe('function');
+			});
+		});
 	});
 
 	describe('Version 2.7.3', function() {