added tests with 'travis-ci' integration

.gitignore

@@ -20,3 +20,6 @@ Properties
 
 # VIM backup files
 *~
+
+# test folder
+!_tests/*

.travis.yml

@@ -0,0 +1,3 @@
+language: node_js
+node_js:
+  - 0.8

_tests/src/exec.ts

@@ -0,0 +1,77 @@
+//
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// 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.
+//
+
+// Allows for executing a program with command-line arguments and reading the result
+interface IExec {
+    exec: (filename: string, cmdLineArgs: string[], handleResult: (ExecResult) => void) => void;
+}
+
+declare var require;
+
+class ExecResult {
+    public stdout = "";
+    public stderr = "";
+    public exitCode: number;
+}
+
+class WindowsScriptHostExec implements IExec {
+    public exec(filename: string, cmdLineArgs: string[], handleResult: (ExecResult) => void) : void {
+        var result = new ExecResult();
+        var shell = new ActiveXObject('WScript.Shell');
+        try {
+            var process = shell.Exec(filename + ' ' + cmdLineArgs.join(' '));
+        } catch(e) {
+            result.stderr = e.message;
+            result.exitCode = 1
+            handleResult(result);
+            return;
+        }
+        // Wait for it to finish running
+        while (process.Status != 0) { /* todo: sleep? */ }
+
+
+        result.exitCode = process.ExitCode;
+        if(!process.StdOut.AtEndOfStream) result.stdout = process.StdOut.ReadAll();
+        if(!process.StdErr.AtEndOfStream) result.stderr = process.StdErr.ReadAll();
+
+        handleResult(result);
+    }
+}
+
+class NodeExec implements IExec {
+    public exec(filename: string, cmdLineArgs: string[], handleResult: (ExecResult) => void) : void {
+        var nodeExec = require('child_process').exec;
+
+        var result = new ExecResult();
+        result.exitCode = null;
+        var cmdLine = filename + ' ' + cmdLineArgs.join(' ');
+
+        var process = nodeExec(cmdLine, function (error, stdout, stderr) {
+            result.stdout = stdout;
+            result.stderr = stderr;
+            result.exitCode = error ? error.code : 0;
+            handleResult(result);
+        });
+    }
+}
+
+var Exec: IExec = function() : IExec {
+    var global = <any>Function("return this;").call(null);
+    if(typeof global.ActiveXObject !== "undefined") {
+        return new WindowsScriptHostExec();
+    } else {
+        return new NodeExec();
+    }
+}();