inventory specs

describe LineItem do
    context "#save" do
        context "when track inventory is true" do
            it "should adjust inventory counts" do
                # set preference here
                InventoryUnit.should_receive(:adjust_inventory_counts).with(order)
                order.save
            end
        end
        context "when track inventory is false" do
            it "should not adjust inventory counts"
        end
        context "when create inventory is true" do
            it "should manage inventory units"
        end
        context "when create inventory is false" do
            it "should not manage inventory units"
        end
    end
end

describe "InventoryUnits" do
    let(:order) { mock_model Order }
    let(:variant) { mock_model Variant }
    let(:line_item) { mock_model(LineItem, :order => order, :variant => variant, :quantity => 2 }

    context "#adjust_counts" do
    end

    context "#adjust_units" do    
        
        context "when new units are called for" do
            berfore { order.stub_chain :inventory_units, :by_variant, :count => 1 }
            
            it "should create the required units" do
                InventoryUntis.should_receive(:create_units).with(variant, 1)
                InventoryUnits.adjust_units(line_item)
            end
            it "should not destroy units"
        end
        context "when less units are called for" do
            berfore { order.stub_chain :inventory_units, :by_variant, :count => 3 }
            
            it "should not add units" do
                InventoryUnits.should_not_receive :create_units
            end
            it "should remove the correct units" do
            end
        end
        it "should add units when called for" do
        end
        it "should remove units when called for"
    end
    context "#create_units" do
    
    end
end