Click the green arrow to the right of the address bar to start the server. The status bar turns yellow to let you know the server is running, but has no slave browsers.
Then, copy the capture URL and paste it in a browser. The status bar turns green, and the corresponding browser icon lights up. Now you’re ready to run tests.
To run tests, right-click greeter.jstd and choose Run “greeter.jstd”. Tests will be run against the local JsTestDriver server.
In our case we have one failed test "GreeterTest.test greet null". You can easily navigate from the stack trace to the source code that causes problems. You can also navigate from the test results tree to the test case/test function declaration using the F4 key.