Fix no implicit conversion to rational from nil (#239)

* Fix no implicit conversion to rational from nil
Before this change if the boottime was nil, the check_ready
loop would exit on Time.now - host['boottime'] with a TypeError
in jruby. The boottime is nil when the power is Off so moving that check
earlier should catch that bug.

* set test data properly

lib/vmpooler/pool_manager.rb

@@ -119,8 +119,17 @@ module Vmpooler
         return
       end
 
+      $redis.hset('vmpooler__vm__' + vm, 'check', Time.now)
+      # Check if the VM is not powered on, before checking TTL
+      unless host['powerstate'].casecmp('poweredon').zero?
+        $redis.smove('vmpooler__ready__' + pool, 'vmpooler__completed__' + pool, vm)
+        $logger.log('d', "[!] [#{pool}] '#{vm}' appears to be powered off, removed from 'ready' queue")
+        return
+      end
+
       # Check if the hosts TTL has expired
       if ttl > 0
+        # host['boottime'] may be nil if host is not powered on
         if ((Time.now - host['boottime']) / 60).to_s[/^\d+\.\d{1}/].to_f > ttl
           $redis.smove('vmpooler__ready__' + pool, 'vmpooler__completed__' + pool, vm)
 
@@ -129,14 +138,6 @@ module Vmpooler
         end
       end
 
-      $redis.hset('vmpooler__vm__' + vm, 'check', Time.now)
-      # Check if the VM is not powered on
-      unless host['powerstate'].casecmp('poweredon').zero?
-        $redis.smove('vmpooler__ready__' + pool, 'vmpooler__completed__' + pool, vm)
-        $logger.log('d', "[!] [#{pool}] '#{vm}' appears to be powered off, removed from 'ready' queue")
-        return
-      end
-
       # Check if the hostname has magically changed from underneath Pooler
       if host['hostname'] != vm
         $redis.smove('vmpooler__ready__' + pool, 'vmpooler__completed__' + pool, vm)

spec/unit/pool_manager_spec.rb

@@ -322,7 +322,9 @@ EOT
 
       context 'is turned off' do
         before(:each) do
+          host['boottime'] = nil
           host['powerstate'] = 'PoweredOff'
+          ttl = 1440
         end
 
         it 'should move the VM to the completed queue' do