Fix failing testst

spec/controllers/transactions_controller_spec.rb

@@ -17,14 +17,18 @@ RSpec.describe TransactionsController, type: :controller do
           cents: 70,
           message: 'hoi'
         }}
-        post :create, @attributes
-        @transaction = Transaction.last
       end
 
       it "should create a new transaction" do
         expect {post :create, @attributes}.to change {Transaction.count}.by(1)
       end
 
+      describe "fields" do
+        before :each do
+          post :create, @attributes
+          @transaction = Transaction.last
+        end
+
         it "should set debtor" do
           expect(@transaction.debtor).to eq(@debtor)
         end
@@ -41,6 +45,7 @@ RSpec.describe TransactionsController, type: :controller do
           expect(@transaction.issuer).to eq(@debtor)
         end
       end
+    end
 
     context "with float euros" do
       it "should set correct amount" do