1 files changed, 33 insertions, 0 deletions
diff --git a/puppet/modules/stdlib/spec/functions/unique_spec.rb b/puppet/modules/stdlib/spec/functions/unique_spec.rb
new file mode 100755
index 00000000..7cd3a566
--- /dev/null
+++ b/puppet/modules/stdlib/spec/functions/unique_spec.rb
@@ -0,0 +1,33 @@
+#! /usr/bin/env ruby -S rspec
+require 'spec_helper'
+
+describe "the unique function" do
+  let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
+
+  it "should exist" do
+    expect(Puppet::Parser::Functions.function("unique")).to eq("function_unique")
+  end
+
+  it "should raise a ParseError if there is less than 1 arguments" do
+    expect { scope.function_unique([]) }.to( raise_error(Puppet::ParseError))
+  end
+
+  it "should remove duplicate elements in a string" do
+    result = scope.function_unique(["aabbc"])
+    expect(result).to(eq('abc'))
+  end
+
+  it "should remove duplicate elements in an array" do
+    result = scope.function_unique([["a","a","b","b","c"]])
+    expect(result).to(eq(['a','b','c']))
+  end
+
+  it "should accept objects which extend String" do
+    class AlsoString < String
+    end
+
+    value = AlsoString.new('aabbc')
+    result = scope.function_unique([value])
+    result.should(eq('abc'))
+  end
+end