How to run a single test case using Jasmine?

Recently I started using Jasmine in my Angular2 project and had hard time figuring out how to run a single test case file . I googled quite a bit (remember I am new to Jasmine). Lot of people asked the same question in the forums and there wasn’t a straight answer . Then I looked in the jasmine documentation and here it is , just add ‘f’ infront of the describe . ‘f’ means focused .

fdescribe(‘Test My Service ’, () => {

});

Almost spent a full day for that magical ‘f’ suffix :)