Add join_keys_to_values function

This commit adds a function that joins each of a hash's keys with that
key's corresponding value, separated by a separator string. The
arguments are a hash and separator string. The return value is an
array of joined key/value pairs.

1 files changed, 40 insertions, 0 deletions

diff --git a/spec/unit/puppet/parser/functions/join_keys_to_values_spec.rb b/spec/unit/puppet/parser/functions/join_keys_to_values_spec.rb
new file mode 100644
index 0000000..a52fb71
--- /dev/null
+++ b/spec/unit/puppet/parser/functions/join_keys_to_values_spec.rb
@@ -0,0 +1,40 @@
+#! /usr/bin/env ruby -S rspec
+require 'spec_helper'
+
+describe "the join_keys_to_values function" do
+  let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
+
+  it "should exist" do
+    Puppet::Parser::Functions.function("join_keys_to_values").should == "function_join_keys_to_values"
+  end
+
+  it "should raise a ParseError if there are fewer than two arguments" do
+    lambda { scope.function_join_keys_to_values([{}]) }.should raise_error Puppet::ParseError
+  end
+
+  it "should raise a ParseError if there are greater than two arguments" do
+    lambda { scope.function_join_keys_to_values([{}, 'foo', 'bar']) }.should raise_error Puppet::ParseError
+  end
+
+  it "should raise a TypeError if the first argument is an array" do
+    lambda { scope.function_join_keys_to_values([[1,2], ',']) }.should raise_error TypeError
+  end
+
+  it "should raise a TypeError if the second argument is an array" do
+    lambda { scope.function_join_keys_to_values([{}, [1,2]]) }.should raise_error TypeError
+  end
+
+  it "should raise a TypeError if the second argument is a number" do
+    lambda { scope.function_join_keys_to_values([{}, 1]) }.should raise_error TypeError
+  end
+
+  it "should return an empty array given an empty hash" do
+    result = scope.function_join_keys_to_values([{}, ":"])
+    result.should == []
+  end
+
+  it "should join hash's keys to its values" do
+    result = scope.function_join_keys_to_values([{'a'=>1,2=>'foo',:b=>nil}, ":"])
+    result.should =~ ['a:1','2:foo','b:']
+  end
+end