state: implement Unit.AssignToUnusedMachine

state/tools_test.go

Index: state/tools_test.go
=== modified file 'state/tools_test.go'
--- state/tools_test.go	2012-09-19 13:40:41 +0000
+++ state/tools_test.go	2012-09-20 16:30:05 +0000
@@ -60,5 +60,5 @@
 	c.Assert(err, IsNil)
 	unit, err := svc.AddUnit()
 	c.Assert(err, IsNil)
-	testAgentTools(c, unit, "unit wordpress/0")
+	testAgentTools(c, unit, `unit "wordpress/0"`)
 }