tap/spec/models/order_item_spec.rb
2016-03-08 15:53:50 +01:00

73 lines
1.7 KiB
Ruby

# == Schema Information
#
# Table name: order_items
#
# id :integer not null, primary key
# order_id :integer
# product_id :integer not null
# count :integer default(0)
#
describe OrderItem do
it 'has a valid factory' do
order_item = create :order_item
expect(order_item).to be_valid
end
############
# FIELDS #
############
describe 'fields' do
before :each do
@order_item = create :order_item
end
describe 'product' do
it 'should be present' do
@order_item.product = nil
expect(@order_item).to_not be_valid
end
end
describe 'count' do
it 'should be present' do
@order_item.count = nil
expect(@order_item).to_not be_valid
end
it 'should be positive' do
@order_item.count = -5
expect(@order_item).to_not be_valid
end
it 'should be less or equal to product stock' do
@order_item.count = @order_item.product.stock + 1
expect(@order_item).to_not be_valid
@order_item.count = [@order_item.product.stock, 100].min
expect(@order_item).to be_valid
end
end
end
###############
# CALLBACKS #
###############
describe 'stock change' do
before :each do
@product = create :product
@count = rand 10
@order_item = build :order_item, product: @product, count: @count
end
it 'should decrement on create' do
expect{ @order_item.save }.to change{ @product.stock }.by(-@count)
end
it 'should increment on destroy' do
@order_item.save
expect{ @order_item.destroy }.to change{ @product.stock }.by(@count)
end
end
end