Add setName and exec test

test.js

@@ -0,0 +1,22 @@
+var sudo = require('./');
+var exec = require('child_process').exec;
+
+function cleanup() {
+  exec('sudo -k');
+}
+
+console.log('sudo.setName("Test")');
+console.log('sudo.exec("echo hello")');
+sudo.setName('Test');
+sudo.exec('echo hello',
+  function(error, stdout, stderr) {
+    console.log('error: ' + error);
+    console.log('stdout: ' + JSON.stringify(stdout));
+    console.log('stderr: ' + JSON.stringify(stderr));
+    cleanup();
+    if (error) throw error;
+    if (stdout !== 'hello\n') throw new Error('stdout != "hello\n"');
+    if (stderr !== "") throw new Error('stderr != ""');
+    console.log('OK');
+  }
+);