puppet error with native code

#!/usr/bin/env bash

# first create the file with puppet just like sensu does
puppet apply --verbose -e 'file{"/tmp/testfile.txt": ensure => present, content => "foobar"}'

# now try to write to the file from ruby code (aka. the provide) just like puppet

cat > /tmp/providertest.rb << 'EOF'
#!/usr/bin/env ruby

File.open('/tmp/test2/testfile.txt', 'w').do |file|
    file.write('hello world')
done
EOF

ruby /tmp/providertest.rb

/tmp/testfile.txt
/tmp/providertest.rb