Add lookup_hiera_hash function

The lookup_hiera_hash function is meant to lookup for the value
of a given key from a given Hiera hash. In the manifests this is
possible by saving the value of the hash in a variable first but
when driving lookups from the Heat templates we can't do it.

Change-Id: Ie31bb70314db44a0a18e86090cc74aa4df5de169

1 files changed, 20 insertions, 0 deletions

diff --git a/spec/functions/lookup_hiera_hash_spec.rb b/spec/functions/lookup_hiera_hash_spec.rb
new file mode 100644
index 0000000..ffaf8b5
--- /dev/null
+++ b/spec/functions/lookup_hiera_hash_spec.rb
@@ -0,0 +1,20 @@
+require 'spec_helper'
+require 'puppet'
+
+# puppet 4.0 call_function() has no visibility of 3.x functions and will fail anyway
+unless Puppet.version =~ /^4\.0/
+  describe 'lookup_hiera_hash' do
+    # working version
+    it { should run.with_params('my_hash', 'network').and_return('127.0.0.1') }
+    # raise if key does not exist
+    it { should run.with_params('my_hash', 'not_network').and_raise_error(Puppet::ParseError) }
+    # raise if hash value returned by hiera is not a hash
+    it { should run.with_params('not_hash', 'key').and_raise_error(Puppet::ParseError) }
+    # raise if arguments are not two
+    it { should run.with_params('hash', 'key', 'unexpected').and_raise_error(ArgumentError) }
+    it { should run.with_params('hash').and_raise_error(ArgumentError) }
+    # raise if arguments are not strings
+    it { should run.with_params({}, 'key').and_raise_error(Puppet::ParseError) }
+    it { should run.with_params('hash', true).and_raise_error(Puppet::ParseError) }
+  end
+end