Improve error message displayed when environment.yml is not found.

test/support/test_environment.rb

@@ -2,23 +2,39 @@ require 'active_support/core_ext/hash/indifferent_access'
 
 module Aviator
 class Test
-  
+
   module Environment
-    
+
     class << self
-      
+
       attr_reader :config,
                   :path
-      
+
       def init!
         @path = Pathname.new(__FILE__).join('..', '..', 'environment.yml').expand_path
+        
+        unless path.file?
+          raise <<-EOF
 
-        raise "Environment file #{ path } does not exist. Please make one." unless path.file?
-      
+
+=======================================================================
+The test suite could not find an environment file at:
+
+#{ path }
+
+The test suite needs this so it will know which OpenStack environment
+to connect to when creating new VCR cassettes. Please make one by
+copying the contents of environment.yml.example.
+=======================================================================
+
+
+EOF
+        end
+        
         @config = YAML.load_file(path).with_indifferent_access
       end
-      
-      
+
+
       def method_missing(name, *args)
         if config.keys.include? name.to_s
           config[name.to_s]
@@ -26,11 +42,11 @@ class Test
           super name, *args
         end
       end
-      
+
     end
-    
+
   end
-  
+
   Environment.init!
 
 end