try to find a free port if default already in use

[just-boris]

Now if specified port already is being used, plugin will throw an exception. It would be nice to be able try another port without extra bothering. Karma test runner already have this feature.

I often use your project when I have to test front end within java applications, and I wish to have this feature here as well. It will try to connect the default port, and if it is used, then try next port, and throw the error only if all of next 10 ports already busy.

[mprins]

You might want to use InetSocketAddress with a portnumber of 0 to find a free ephemeral port.

eg.

int newPort = new java.net.InetSocketAddress(0).getPort();

[just-boris]

Yes, I saw that behaviour.
But the main feature, which my logic gives, is a predictable used port range. Sometimes, (with a firewall, for example), you cannot connect to random port, but can setup trusted range (8234-8244 here by default).

Is there an another way to get free port from some given range?

[mprins]

Is there an another way to get free port from some given range?
AFAIK no.

[klieber]

This should be resolved in 3.0-beta-01. I decided to go with the simpler and more performant approach of just allowing the system to choose a random port if 8234 is not available. Seems to work nicely with the changes in #352 which automatically opens the browser and navigates to the spec runner for you.