add check for state on job restart and cancel

lib/travis/api/v3.rb

@@ -35,6 +35,8 @@ module Travis
       NotImplemented      = ServerError        .create('request not (yet) implemented', status: 501)
       RequestLimitReached = ClientError        .create('request limit reached for resource', status: 429)
       AlreadySyncing      = ClientError        .create('sync already in progress', status: 409)
+      AlreadyRunning      = ClientError        .create('job already running', status: 409)
+      NotCancelable       = ClientError        .create('job is not running, cannot canel', status: 409)
       MethodNotAllowed    = ClientError        .create('method not allowed', status: 405)
     end
   end

lib/travis/api/v3/queries/job.rb

@@ -8,12 +8,17 @@ module Travis::API::V3
     end
 
     def cancel(user)
+      puts find.state
+      raise NotCancelable if %w(passed failed cancelled errored).include? find.state
       payload = { id: id, user_id: user.id, source: 'api' }
       perform_async(:job_cancellation, payload)
       payload
     end
 
     def restart(user)
+      puts find.state
+      puts find.state.class
+      raise AlreadyRunning if %w(received queued started).include? find.state
       payload = { id: id, user_id: user.id, source: 'api' }
       perform_async(:job_restart, payload)
       payload