Adds valuator investment abilities

app/models/abilities/valuator.rb

@@ -3,7 +3,9 @@ module Abilities
     include CanCan::Ability
 
     def initialize(user)
+      valuator = user.valuator
       can [:read, :update, :valuate], SpendingProposal
+      can [:update, :valuate], Budget::Investment, id: valuator.investment_ids, budget: { valuating: true }
     end
   end
-end
+end

app/models/valuator.rb

@@ -4,6 +4,8 @@ class Valuator < ActiveRecord::Base
 
   has_many :valuation_assignments, dependent: :destroy
   has_many :spending_proposals, through: :valuation_assignments
+  has_many :valuator_assignments, dependent: :destroy, class_name: 'Budget::ValuatorAssignment'
+  has_many :investments, through: :valuator_assignments, class_name: 'Budget::Investment'
 
   validates :user_id, presence: true, uniqueness: true
 

spec/models/abilities/valuator_spec.rb

@@ -5,8 +5,24 @@ describe "Abilities::Valuator" do
   subject(:ability) { Ability.new(user) }
   let(:user) { valuator.user }
   let(:valuator) { create(:valuator) }
+  let(:non_assigned_investment) { create(:budget_investment) }
+
+  let(:assigned_investment) { create(:budget_investment, budget: create(:budget, valuating: true)) }
+  before(:each) { assigned_investment.valuators << valuator }
+
+  let(:assigned_investment_not_valuating) { create(:budget_investment, budget: create(:budget, valuating: false)) }
+  before(:each) { assigned_investment_not_valuating.valuators << valuator }
 
   it { should be_able_to(:read, SpendingProposal) }
   it { should be_able_to(:update, SpendingProposal) }
   it { should be_able_to(:valuate, SpendingProposal) }
+
+  it { should_not be_able_to(:update, non_assigned_investment) }
+  it { should_not be_able_to(:valuate, non_assigned_investment) }
+
+  it { should be_able_to(:update, assigned_investment) }
+  it { should be_able_to(:valuate, assigned_investment) }
+
+  it { should_not be_able_to(:update, assigned_investment_not_valuating) }
+  it { should_not be_able_to(:valuate, assigned_investment_not_valuating) }
 end