ba6dd13990
This function is similar to a coalesce function in SQL in that it will return the first value in a list of values that is not undefined or an empty string (two things in Puppet that will return a boolean false value). Typically, this function is used to check for a value in the Puppet Dashboard/Enterprise Console, and failover to a default value like the following: $real_jenkins_version = pick($::jenkins_version, '1.449') The value of $real_jenkins_version will first look for a top-scope variable called 'jenkins_version' (note that parameters set in the Puppet Dashboard/ Enterprise Console are brought into Puppet as top-scope variables), and, failing that, will use a default value of 1.449.
34 lines
979 B
Ruby
34 lines
979 B
Ruby
#!/usr/bin/env ruby -S rspec
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require 'spec_helper'
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describe "the pick function" do
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let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
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it "should exist" do
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Puppet::Parser::Functions.function("pick").should == "function_pick"
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end
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it 'should return the correct value' do
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scope.function_pick(['first', 'second']).should == 'first'
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end
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it 'should return the correct value if the first value is empty' do
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scope.function_pick(['', 'second']).should == 'second'
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end
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it 'should remove empty string values' do
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scope.function_pick(['', 'first']).should == 'first'
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end
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it 'should remove :undef values' do
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scope.function_pick([:undef, 'first']).should == 'first'
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end
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it 'should remove :undefined values' do
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scope.function_pick([:undefined, 'first']).should == 'first'
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end
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it 'should error if no values are passed' do
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expect { scope.function_pick([]) }.to raise_error(Puppet::Error, /Must provide non empty value./)
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end
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end
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