describe ChatWork::Client do
  describe '#initialize' do
    subject { ChatWork::Client.new(api_key, access_token, api_base, api_version) }

    let(:api_key)      { nil }
    let(:access_token) { nil }
    let(:api_base)     { 'https://api.chatwork.com/' }
    let(:api_version)  { '/v2' }

    context 'with api_key' do
      let(:api_key) { 'my_api_key' }

      it 'client has X-ChatWorkToken header' do
        connection = subject.instance_variable_get(:@conn)

        expect(connection.headers['X-ChatWorkToken']).to eq "my_api_key"
      end
    end

    context 'with access_token' do
      let(:access_token) { 'my_access_token' }

      it 'client has Authorization header' do
        connection = subject.instance_variable_get(:@conn)

        expect(connection.headers['Authorization']).to eq "Bearer my_access_token"
      end
    end

    context 'without both api_key and access_token' do
      it { expect { subject }.to raise_error 'Either api_key or access_token is required' }
    end
  end
end