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@@ -155,6 +155,10 @@ module RspecOnRailsOnCrack
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     #
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     #   it_assigns :foo # => assigns[:foo].should == @foo
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     #
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+    # If there is no instance variable @foo, it will just check to see if its not nil:
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+    #
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+    #   if_assigns :foo # => assigns[:foo].should_not be_nil (if @foo is not defined in spec)
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+    #
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     # Check multiple instance variables
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     # 
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     #   it_assigns :foo, :bar
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@@ -285,7 +289,11 @@ module RspecOnRailsOnCrack
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           when :undefined
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             controller.send(:instance_variables).should_not include("@#{name}")
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           when Symbol
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-            assigns[name].should == instance_variable_get("@#{value}")
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+            if (instance_variable = instance_variable_get("@#{value}")).nil?
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+              assigns[name].should_not be_nil
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+            else
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+              assigns[name].should == instance_variable
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+            end
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           end
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       end
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     end