add more transaction controller tests

spec/controllers/transactions_controller_spec.rb

@@ -1,4 +1,5 @@
 require 'rails_helper'
+require 'spec_helper'
 
 RSpec.describe TransactionsController, type: :controller do
   describe "creating transaction" do
@@ -8,14 +9,36 @@ RSpec.describe TransactionsController, type: :controller do
       sign_in @debtor
     end
 
-    it "should create a valid transaction" do
-      expect do
-        put :create, { transaction: {
+    context "with valid attributes" do
+      before :each do
+        @attributes = { transaction: {
           creditor: @creditor.name,
           amount: 20,
-          message: "hoi"
+          message: 'hoi'
         }}
-      end.to change {Transaction.count}.by(1)
+        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
+
+      it "should set debtor" do
+        expect(@transaction.debtor).to eq(@debtor)
+      end
+
+      it "should set amount" do
+        expect(@transaction.amount).to eq(20)
+      end
+
+      it "should set creditor" do
+        expect(@transaction.creditor).to eq(@creditor)
+      end
+
+      it "should set issuer" do
+        expect(@transaction.issuer).to eq(@debtor)
+      end
     end
   end
 end