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spec_dir = File.expand_path(File.join(File.dirname(__FILE__)))
$LOAD_PATH.unshift(spec_dir)
$LOAD_PATH.uniq!

require 'googleauth/iam'

describe Google::Auth::IAMCredentials do
  IAMCredentials = Google::Auth::IAMCredentials
  let(:test_selector) { 'the-test-selector' }
  let(:test_token) { 'the-test-token' }
  let(:test_creds) { IAMCredentials.new(test_selector, test_token) }

  describe '#apply!' do
    it 'should update the target hash with the iam values' do
      md = { foo: 'bar' }
      test_creds.apply!(md)
      expect(md[IAMCredentials::SELECTOR_KEY]).to eq test_selector
      expect(md[IAMCredentials::TOKEN_KEY]).to eq test_token
      expect(md[:foo]).to eq 'bar'
    end
  end

  describe 'updater_proc' do
    it 'should provide a proc that updates a hash with the iam values' do
      md = { foo: 'bar' }
      the_proc = test_creds.updater_proc
      got = the_proc.call(md)
      expect(got[IAMCredentials::SELECTOR_KEY]).to eq test_selector
      expect(got[IAMCredentials::TOKEN_KEY]).to eq test_token
      expect(got[:foo]).to eq 'bar'
    end
  end

  describe '#apply' do
    it 'should not update the original hash with the iam values' do
      md = { foo: 'bar' }
      test_creds.apply(md)
      expect(md[IAMCredentials::SELECTOR_KEY]).to be_nil
      expect(md[IAMCredentials::TOKEN_KEY]).to be_nil
      expect(md[:foo]).to eq 'bar'
    end

    it 'should return a with the iam values' do
      md = { foo: 'bar' }
      got = test_creds.apply(md)
      expect(got[IAMCredentials::SELECTOR_KEY]).to eq test_selector
      expect(got[IAMCredentials::TOKEN_KEY]).to eq test_token
      expect(got[:foo]).to eq 'bar'
    end
  end
end