tab/spec/controllers/transactions_controller_spec.rb

describe TransactionsController, type: :controller do
  describe "creating transaction" do
    before :each do
      @debtor = create(:user)
      @creditor = create(:user)
      sign_in @debtor
    end

    context "with valid attributes" do
      before :each do
        @attributes = { transaction: {
          debtor: @debtor.name,
          creditor: @creditor.name,
          cents: 70,
          message: "hoi"
        } }
      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

        it "should set amount" do
          expect(@transaction.amount).to eq(70)
        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

    context "with float euros" do
      it "should set correct amount" do
        post :create, transaction: {
          debtor: @debtor.name,
          creditor: @creditor.name,
          euros: 10.5,
          message: "Omdat je een leuke jongen bent!"
        }
        expect(Transaction.last.amount).to eq(1050)
      end
    end

    context "with negative amount" do
      it "should be refused" do
        expect do
          post :create, transaction: attributes_for(:transaction, cents: -20)
        end.not_to change { Transaction.count }
      end
    end

    context "for other user" do
      it "should be refused" do
        expect do
          post :create, transaction: {
            debtor: @creditor.name,
            creditor: @debtor.name,
            euros: 10000000,
            message: "DIT IS OVERVAL"
          }
        end.not_to change { Transaction.count }
      end
    end
  end
end