require "spec_helper"

describe Stellar::Transaction do
  subject do
    Stellar::Transaction.new({
      source_account: Stellar::AccountID.new(:key_types_ed25519, "\x00" * 32),
      fee:            10,
      seq_num:        1,
      memo:           Stellar::Memo.new(:memo_none),
      ext:            Stellar::Transaction::Ext.new(0),
      operations:     [
        Stellar::Operation.new(body: Stellar::Operation::Body.new(:inflation))
      ]
    })
  end
  let(:key_pair){ Stellar::KeyPair.random }

  describe "#sign" do
    let(:result){ subject.sign(key_pair) }

    it "returns a signature of SHA256(signature_base of the transaction)" do
      hash     = Digest::SHA256.digest(subject.signature_base)
      expected = key_pair.sign(hash)
      expect(result).to eq(expected)
    end
  end

  describe  "#to_envelope" do
    let(:result){ subject.to_envelope(key_pair) }

    it "return a Stellar::TransactionEnvelope" do
      expect(result).to be_a(Stellar::TransactionEnvelope)
    end

    it "correctly signs the transaction" do
      expect(result.signatures.length).to eq(1)
      expect(result.signatures.first).to be_a(Stellar::DecoratedSignature)
      expect(result.signatures.first.hint).to eq(key_pair.signature_hint)
      expect(result.signatures.first.signature).to eq(subject.sign(key_pair))
    end
  end
end