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gaia/tests/jsmarionette/runner/marionette-js-runner/test/integration/clientasync.js

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+'use strict';
+var assert = require('assert');
+
+marionette('client async', function() {
+  var Tcp = require('marionette-client').Drivers.Tcp;
+  var client = marionette.client({ driver: Tcp });
+
+  function onePlusOne() {
+    return 1 + 1;
+  }
+
+  test('async magic', function(done) {
+    var isAsync = false;
+    client.executeScript(onePlusOne, function(err, result) {
+      if (!isAsync) return done(new Error('is sync!'));
+      assert.equal(result, 2);
+      done();
+    });
+    isAsync = true;
+  });
+
+});