# File lib/fog/aws/requests/sts/assume_role_with_web_identity.rb, line 20
        def assume_role_with_web_identity(role_arn, web_identity_token, role_session_name, options={})
          role = options[:iam].data[:roles].values.detect { |r| r[:arn] == role_arn }

          Excon::Response.new.tap do |response|
            response.body = {
              'AssumedRoleUser' => {
                'Arn'           => role[:arn],
                'AssumedRoleId' => role[:role_id]
              },
              'Audience'    => 'fog',
              'Credentials' => {
                'AccessKeyId'     => Fog::AWS::Mock.key_id(20),
                'Expiration'      => options[:expiration] || Time.now + 3600,
                'SecretAccessKey' => Fog::AWS::Mock.key_id(40),
                'SessionToken'    => Fog::Mock.random_hex(8)
              },
              'Provider'                    => 'fog',
              'SubjectFromWebIdentityToken' => Fog::Mock.random_hex(8)
            }
            response.status = 200
          end
        end