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@@ -31,6 +31,10 @@ module ActiveDocument
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       @property_index[key] = value
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     end
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+    def include?(key)
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+      !@property_index[key].nil?
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+    end
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+    
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     class Property
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       attr_reader :name
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@@ -16,7 +16,7 @@ describe ActiveDocument::Schema do
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     end
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   end
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-  describe "#property" do
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+  describe "#property(type, name)" do
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     before :all do
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       @adding_property = lambda do
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         MockRecord::Generic.schema { property :string, :name }
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@@ -38,4 +38,12 @@ describe ActiveDocument::Schema do
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       MockRecord::Generic.schema[:name].should == ActiveDocument::Schema::StringProperty.new(:name)
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     end
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   end
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+  
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+  describe "#include?" do
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+    it "knows if the given property has been created" do
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+       MockRecord::Generic.schema { property :string, :name }
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+       MockRecord::Generic.schema.should     include(:name)
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+       MockRecord::Generic.schema.should_not include(:foo)
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+    end
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+  end
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 end
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