Add ensure string helper for nodes.

test/red/utils_spec.js

@@ -0,0 +1,41 @@
+/**
+ * Copyright 2014 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+var should = require("should");
+var utils = require("../../red/utils");
+
+describe("red/utils", function() {
+    describe('ensureString', function() {
+        it('strings are preserved', function() {
+            utils.ensureString('string').should.equal('string');
+        });
+        it('Buffer is converted', function() {
+            var s = utils.ensureString(new Buffer('foo'));
+            s.should.equal('foo');
+            (typeof s).should.equal('string');
+        });
+        it('Object is converted to JSON', function() {
+            var s = utils.ensureString({foo: "bar"});
+            (typeof s).should.equal('string');
+            should.deepEqual(JSON.parse(s), {foo:"bar"});
+        });
+        it('stringifies other things', function() {
+            var s = utils.ensureString(123);
+            (typeof s).should.equal('string');
+            s.should.equal('123');
+        });
+    });
+});
+