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-rw-r--r--lib/puppet/parser/functions/array_union.rb10
-rw-r--r--spec/unit/parser/functions/array_union.rb39
2 files changed, 49 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/array_union.rb b/lib/puppet/parser/functions/array_union.rb
new file mode 100644
index 0000000..1ccad3f
--- /dev/null
+++ b/lib/puppet/parser/functions/array_union.rb
@@ -0,0 +1,10 @@
+Puppet::Parser::Functions::newfunction(
+ :array_union,
+ :type => :rvalue,
+ :doc => "Unions two arrays
+
+ Example: array_union(['a','b'],['c']) -> ['a','b','c']"
+) do |args|
+ raise Puppet::ParseError, 'array_union() needs two arguments' if args.length != 2
+ args[0].to_a | args[1].to_a
+end
diff --git a/spec/unit/parser/functions/array_union.rb b/spec/unit/parser/functions/array_union.rb
new file mode 100644
index 0000000..37df2b3
--- /dev/null
+++ b/spec/unit/parser/functions/array_union.rb
@@ -0,0 +1,39 @@
+#! /usr/bin/env ruby
+
+require File.dirname(__FILE__) + '/../../../spec_helper'
+
+describe "the array_union function" do
+
+ before :each do
+ @scope = Puppet::Parser::Scope.new
+ end
+
+ it "should exist" do
+ Puppet::Parser::Functions.function("array_union").should == "function_array_union"
+ end
+
+ it "should raise a ParseError if there is less than 2 arguments" do
+ lambda { @scope.function_array_union([["foo"]]) }.should( raise_error(Puppet::ParseError))
+ end
+
+ it "should raise a ParseError if there is more than 2 arguments" do
+ lambda { @scope.function_array_union([["foo", "bar", "gazonk"]]) }.should( raise_error(Puppet::ParseError))
+ end
+
+ it "should union to arrays" do
+ result = @scope.function_array_union([['a','b'],['c']])
+ result.should(eql(['a','b','c']))
+ end
+
+ it "should do nothing if an item is present" do
+ result = @scope.function_array_union([['a','b'],['b']])
+ result.should(eql(['a','b']))
+ end
+
+ it "should leave the argument untouched" do
+ a = ['a','b']
+ result = @scope.function_array_union([a,['c']])
+ a.should(eql(['a','b']))
+ end
+
+end