cleaning up some test warnings

Signed-off-by: wycats <wycats@gmail.com>

activerecord/lib/active_record/associations.rb

@@ -111,8 +111,11 @@ module ActiveRecord
     private
       # Gets the specified association instance if it responds to :loaded?, nil otherwise.
       def association_instance_get(name)
-        association = instance_variable_get("@#{name}")
-        association if association.respond_to?(:loaded?)
+        ivar = "@#{name}"
+        if instance_variable_defined?(ivar)
+          association = instance_variable_get(ivar)
+          association if association.respond_to?(:loaded?)
+        end
       end
 
       # Set the specified association instance.

activerecord/lib/active_record/base.rb

@@ -1041,6 +1041,7 @@ module ActiveRecord #:nodoc:
 
           object.instance_variable_set(:'@attributes', record)
           object.instance_variable_set(:'@attributes_cache', {})
+          object.instance_variable_set(:@new_record, false)
 
           object.send(:_run_find_callbacks)
           object.send(:_run_initialize_callbacks)

activerecord/lib/active_record/reflection.rb

@@ -154,6 +154,11 @@ module ActiveRecord
         @klass ||= active_record.send(:compute_type, class_name)
       end
 
+      def initialize(macro, name, options, active_record)
+        super
+        @collection = [:has_many, :has_and_belongs_to_many].include?(macro)
+      end
+
       # Returns a new, unsaved instance of the associated class. +options+ will
       # be passed to the class's constructor.
       def build_association(*options)
@@ -256,9 +261,6 @@ module ActiveRecord
       # association. Returns +true+ if the +macro+ is one of +has_many+ or
       # +has_and_belongs_to_many+, +false+ otherwise.
       def collection?
-        if @collection.nil?
-          @collection = [:has_many, :has_and_belongs_to_many].include?(macro)
-        end
         @collection
       end
 

activerecord/lib/active_record/relation.rb

@@ -14,6 +14,11 @@ module ActiveRecord
 
     def initialize(klass, table)
       @klass, @table = klass, table
+
+      @readonly_value    = nil
+      @create_with_value = nil
+      @implicit_readonly = nil
+
       (ASSOCIATION_METHODS + MULTI_VALUE_METHODS).each {|v| instance_variable_set(:"@#{v}_values", [])}
     end