Created
August 21, 2012 22:33
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stubbing sum vs reduce
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| class User < ActiveRecord::Base | |
| has_many :orders | |
| has_many :order_items, :through => :orders | |
| def revenue | |
| #TODO: stubbing OrderItem#price means I can't use .sum(:price). Is there a better way to use stubs AND sql? | |
| #order_items.kept.sum(:price) | |
| order_items.kept.reduce(0) { |sum, n| sum + n.price } | |
| end | |
| end |
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| require "spec_helper" | |
| describe User do | |
| before(:each) { | |
| OrderItem.any_instance.stub(:price).and_return(25) | |
| } | |
| describe "#revenue" do | |
| context "no orders" do | |
| specify { user.revenue.should == 0 } | |
| end | |
| context "one order" do | |
| specify { user_with_no_kept_items.revenue.should == 0 } | |
| specify { user_with_all_kept_items.revenue.should == 125 } | |
| specify { user_with_one_kept_item.revenue.should == 25 } | |
| end | |
| context "multiple orders" do | |
| it "should return 50 for two orders, each with one kept item" do | |
| 2.times { FactoryGirl.create :order_with_one_kept_item, user: user } | |
| user.revenue.should == 50 | |
| end | |
| end | |
| end |
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