Only run "require" tests when require() is available

spec/qunit_spec.js

@@ -1475,26 +1475,6 @@ test('GH-375: Unicode line terminators', function() {
   shouldCompileTo('\u2028', {}, '\u2028');
 });
 
-test('Load .handlebars files with require()', function() {
-  var template = require("./example_1");
-  assert.deepEqual(template, require("./example_1.handlebars"));
-
-  var expected = 'foo\n';
-  var result = template({foo: "foo"});
-
-  equal(result, expected);
-});
-
-test('Load .hbs files with require()', function() {
-  var template = require("./example_2");
-  assert.deepEqual(template, require("./example_2.hbs"));
-
-  var expected = 'Hello, World!\n';
-  var result = template({name: "World"});
-
-  equal(result, expected);
-});
-
 suite('Utils');
 
 test('escapeExpression', function() {
@@ -1522,3 +1502,27 @@ test('isEmpty', function() {
   equal(Handlebars.Utils.isEmpty('foo'), false);
   equal(Handlebars.Utils.isEmpty({bar: 1}), false);
 });
+
+if (typeof(require) !== 'undefined') {
+  suite('Require');
+
+  test('Load .handlebars files with require()', function() {
+    var template = require("./example_1");
+    assert.deepEqual(template, require("./example_1.handlebars"));
+
+    var expected = 'foo\n';
+    var result = template({foo: "foo"});
+
+    equal(result, expected);
+  });
+
+  test('Load .hbs files with require()', function() {
+    var template = require("./example_2");
+    assert.deepEqual(template, require("./example_2.hbs"));
+
+    var expected = 'Hello, World!\n';
+    var result = template({name: "World"});
+
+    equal(result, expected);
+  });
+}