Created
August 26, 2011 08:08
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Is it possible to rspec this properly without hitting the database?
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create_table "line_items", :force => true do |t| | |
t.integer "cost" | |
t.boolean "paid" | |
t.integer "order_id" | |
end | |
create_table "orders", :force => true do |t| | |
end | |
# ----- | |
class LineItem < ActiveRecord::Base | |
scope :paid, where(:paid => true) | |
end | |
# ----- | |
class Order < ActiveRecord::Base | |
has_many :line_items | |
def total_cost | |
line_items.paid.sum(:cost) | |
end | |
end | |
# ----- | |
require 'spec_helper' | |
describe Order do | |
let(:order) { Order.new(:line_items => line_items) } | |
describe '#total_cost' do | |
subject { order.total_cost } | |
context 'with line items costing 2 and 3 and 4 (unpaid)' do | |
before { order.save! } | |
let(:line_items) { | |
[ | |
LineItem.new(:cost => 2, :paid => true), | |
LineItem.new(:cost => 3, :paid => true), | |
LineItem.new(:cost => 4, :paid => false), | |
] | |
} | |
it { should == 5 } | |
end | |
context 'with no line items' do | |
let(:line_items) { [] } | |
it { should == 0 } | |
end | |
end | |
end |
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That sounds pretty challenging but if it passed the AREL test suite (I haven't looked into it but I assume it has one and that it is reasonably complicated), then it would seem reasonable enough to run your unit tests against that instead of the database.