[Tests] skip template literal tests unless supported

package.json

@@ -76,6 +76,7 @@
     "browser-unpack": "^1.1.1",
     "coffee-script": "~1.10.0",
     "coffeeify": "~1.1.0",
+    "has-template-literals": "^1.0.0",
     "isstream": "^0.1.2",
     "make-generator-function": "^1.1.0",
     "seq": "0.3.5",

test/quotes.js

@@ -2,10 +2,28 @@ var browserify = require('../');
 var vm = require('vm');
 var test = require('tap').test;
 
+var hasTemplateLiterals = require('has-template-literals')();
+
 test('quotes', function (t) {
-    t.plan(3);
+    t.plan(2);
 
     var b = browserify(__dirname + '/quotes/main.js');
+    b.bundle(function (err, src) {
+        var c = {
+            done : function (single, double) {
+                t.equal(single, 'success', 'single quotes');
+                t.equal(double, 'success', 'double quotes');
+                t.end();
+            }
+        };
+        vm.runInNewContext(src, c);
+    });
+});
+
+test('interpolation literals', { skip: !hasTemplateLiterals }, function (t) {
+    t.plan(3);
+
+    var b = browserify(__dirname + '/quotes/backtick.js');
     b.bundle(function (err, src) {
         var c = {
             done : function (single, double, backtick) {

test/quotes/backtick.js

@@ -0,0 +1 @@
+done(require('./one.js'), require("./two.js"), require(`./three.js`));

test/quotes/main.js

@@ -1 +1 @@
-done(require('./one.js'), require("./two.js"), require(`./three.js`));
+done(require('./one.js'), require("./two.js"));