5 Rules - Tests without active record

test.rb

before do
  @user = user_with(first_name: "Maria")
  @project_one = project_with(
    fixed_annual_rate: 11,
    execution_date: Date.new(2015, 10, 8),
    investments: [investment_with(amount: 100_000, user: user)])
end

def project_with(attrs)
  FakeProject.new({ fixed_annual_rate: 11 }.merge(attrs))
end

def investment_with(attrs)
  FakeInvestment.new(attrs)
end

def user_with(attrs)
  FakeUser.new(attrs)
end

class FakeInvestment
  attr_reader :id, :date, :user, :amount, :user_id, :project, :project_id, :investment_type
  
  def initialize(attrs = {})
    @id = attrs[:id] || SecureRandom.uuid
    @date = attrs[:date]
    @user = attrs[:user]
    @user_id = attrs[:user_id] || user && user.id
    @amount = attrs[:amount]
    @project = attrs[:project]
    @project_id = attrs[:project_id] || project && project.id
    @investment_type = attrs[:investment_type]
  end
end