add rake task for getting squeue text output (#841)

Add a rake task for getting squeue text output to help with generating test fixtures.

Rakefile

@@ -1,6 +1,8 @@
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
 
+require_relative 'lib/tasks/slurm'
+
 RSpec::Core::RakeTask.new(:spec)
 
 task :default => :spec

lib/tasks/slurm.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require_relative '../ood_core'
+require_relative '../ood_core/job/adapters/slurm'
+
+namespace :slurm do
+
+  desc 'Get squeue output in the format this gem expects'
+  task :squeue do
+    fields = OodCore::Job::Adapters::Slurm::Batch.new.all_squeue_fields
+    args = OodCore::Job::Adapters::Slurm::Batch.new.squeue_args(options: fields.values)
+
+    single_job = `squeue #{args.join(' ')}`.split("\n")[0...2]
+
+    puts single_job
+  end
+end