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-rwxr-xr-xspec/functions/difference_spec.rb19
1 files changed, 19 insertions, 0 deletions
diff --git a/spec/functions/difference_spec.rb b/spec/functions/difference_spec.rb
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+++ b/spec/functions/difference_spec.rb
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+#! /usr/bin/env ruby -S rspec
+require 'spec_helper'
+
+describe "the difference function" do
+ let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
+
+ it "should exist" do
+ expect(Puppet::Parser::Functions.function("difference")).to eq("function_difference")
+ end
+
+ it "should raise a ParseError if there are fewer than 2 arguments" do
+ expect { scope.function_difference([]) }.to( raise_error(Puppet::ParseError) )
+ end
+
+ it "should return the difference between two arrays" do
+ result = scope.function_difference([["a","b","c"],["b","c","d"]])
+ expect(result).to(eq(["a"]))
+ end
+end