test.rb

require 'rubygems'
require 'fog'

Fog.mock!

describe 'Bug' do
  it 'should not fail' do
    compute = Fog::Compute.new(
      :provider => 'openstack',
      :openstack_username => 'user',
      :openstack_api_key => 'pass',
      :openstack_tenant => 'tenant',
      :openstack_auth_url => 'http://auth/url',
    )

    server_def = {
      :name => 'name',
      :image_ref => 'image_ref',
      :flavor_ref => 'flavor',
      :key_name => 'key_name',
      :user_data => 'user_data',
    }

    server = compute.servers.create(server_def)
  end
end

$ rspec test.rb
F

Failures:

  1) Bug should not fail
     Failure/Error: server = compute.servers.create(server_def)
     ArgumentError:
       Missing required arguments: openstack_auth_url
     # ./test.rb:24:in `block (2 levels) in <top (required)>'

Finished in 0.05619 seconds
1 example, 1 failure

Failed examples:

rspec ./test.rb:7 # Bug should not fail

The test fails with a misleading Missing required arguments: openstack_auth_url error message. Even adding :openstack_auth_url => 'http://foo/auth' doesn't fix the problem, because the error is propagated from the Fog::Identity creation (which happens in the mocking code for create_server).

  1) Bug should not fail
     Failure/Error: server = compute.servers.create(server_def)
     ArgumentError:
       Missing required arguments: openstack_auth_url
     # /Users/rjunior/.rvm/gems/ruby-1.9.3-p429/gems/fog-1.15.0/lib/fog/core/service.rb:208:in `validate_options'
     # /Users/rjunior/.rvm/gems/ruby-1.9.3-p429/gems/fog-1.15.0/lib/fog/core/service.rb:58:in `new'
     # /Users/rjunior/.rvm/gems/ruby-1.9.3-p429/gems/fog-1.15.0/lib/fog/identity.rb:17:in `new'
     # /Users/rjunior/.rvm/gems/ruby-1.9.3-p429/gems/fog-1.15.0/lib/fog/identity.rb:5:in `[]'
     # /Users/rjunior/.rvm/gems/ruby-1.9.3-p429/gems/fog-1.15.0/lib/fog/openstack/requests/compute/create_server.rb:94:in `create_server'