Add status destroy authorization to policy (#3453)

* Add status destroy authorization to policy

* Create explicit unreblog status authorization

spec/policies/status_policy_spec.rb

@@ -4,7 +4,9 @@ require 'pundit/rspec'
 RSpec.describe StatusPolicy, type: :model do
   subject { described_class }
 
+  let(:admin) { Fabricate(:user, admin: true) }
   let(:alice) { Fabricate(:account, username: 'alice') }
+  let(:bob) { Fabricate(:account, username: 'bob') }
   let(:status) { Fabricate(:status, account: alice) }
 
   permissions :show?, :reblog? do
@@ -86,4 +88,22 @@ RSpec.describe StatusPolicy, type: :model do
       expect(subject).to_not permit(viewer, status)
     end
   end
+
+  permissions :destroy?, :unreblog? do
+    it 'grants access when account is deleter' do
+      expect(subject).to permit(status.account, status)
+    end
+
+    it 'grants access when account is admin' do
+      expect(subject).to permit(admin.account, status)
+    end
+
+    it 'denies access when account is not deleter' do
+      expect(subject).to_not permit(bob, status)
+    end
+
+    it 'denies access when no deleter' do
+      expect(subject).to_not permit(nil, status)
+    end
+  end
 end