```ruby
require 'test_helper'

class NordeaRenewCertApplicationRequestTest < ActiveSupport::TestCase
  setup do
    @params = nordea_renew_certificate_params

    # Convert the keys here since the conversion is usually done by the client and these tests
    # bypass the client
    @params[:own_signing_certificate] = x509_certificate(@params[:own_signing_certificate])
    @params[:signing_private_key]     = rsa_key(@params[:signing_private_key])

    application_request = Sepa::SoapBuilder.new(@params).application_request
    @doc                = Nokogiri::XML(application_request.to_xml)
  end

  test "validates against schema" do
    errors = []

    Dir.chdir(SCHEMA_PATH) do
      xsd = Nokogiri::XML::Schema(IO.read('cert_application_request.xsd'))
      xsd.validate(@doc).each do |error|
        errors << error
      end
    end

    assert errors.empty?, "The following schema validations failed:\n#{errors.join("\n")}"
  end

  test "customer id is set correctly" do
    assert_equal @doc.at_css("CustomerId").content, @params[:customer_id]
  end
end
```

Test that timestamp is set correctly
user
```ruby
require 'test_helper'

class NordeaRenewCertApplicationRequestTest < ActiveSupport::TestCase
  setup do
    @params = nordea_renew_certificate_params

    # Convert the keys here since the conversion is usually done by the client and these tests
    # bypass the client
    @params[:own_signing_certificate] = x509_certificate(@params[:own_signing_certificate])
    @params[:signing_private_key]     = rsa_key(@params[:signing_private_key])

    application_request = Sepa::SoapBuilder.new(@params).application_request
    @doc                = Nokogiri::XML(application_request.to_xml)
  end

  test "validates against schema" do
    errors = []

    Dir.chdir(SCHEMA_PATH) do
      xsd = Nokogiri::XML::Schema(IO.read('cert_application_request.xsd'))
      xsd.validate(@doc).each do |error|
        errors << error
      end
    end

    assert errors.empty?, "The following schema validations failed:\n#{errors.join("\n")}"
  end

  test "customer id is set correctly" do
    assert_equal @doc.at_css("CustomerId").content, @params[:customer_id]
  end

  test "timestamp is set correctly" do
    timestamp = Time.strptime(@doc.at_css("Timestamp").content, '%Y-%m-%dT%H:%M:%S%z')
    assert timestamp <= Time.now && timestamp > (Time.now - 60), "Timestamp was not set correctly"
  end
end
```
assistant