Merge pull request #37 from fiddyspence/ticket/master/12776-validate_…

…slength

(#12776) Added validate_slength function and rspec test

lib/puppet/parser/functions/validate_slength.rb

@@ -0,0 +1,52 @@
+module Puppet::Parser::Functions
+
+ newfunction(:validate_slength, :doc => <<-'ENDHEREDOC') do |args|
+ Validate that the first argument is a string (or an array of strings), and
+ less/equal to than the length of the second argument. It fails if the first
+ argument is not a string or array of strings, and if arg 2 is not convertable
+ to a number.
+
+ The following values will pass:
+
+ validate_slength("discombobulate",17)
+ validate_slength(["discombobulate","moo"],17)
+
+ The following valueis will not:
+
+ validate_slength("discombobulate",1)
+ validate_slength(["discombobulate","thermometer"],5)
+
+ ENDHEREDOC
+
+ raise Puppet::ParseError, ("validate_slength(): Wrong number of arguments (#{args.length}; must be = 2)") unless args.length == 2
+
+ unless (args[0].is_a?(String) or args[0].is_a?(Array))
+ raise Puppet::ParseError, ("validate_slength(): please pass a string, or an array of strings - what you passed didn't work for me at all - #{args[0].class}")
+ end
+
+ begin
+ max_length = args[1].to_i
+ rescue NoMethodError => e
+ raise Puppet::ParseError, ("validate_slength(): Couldn't convert whatever you passed as the length parameter to an integer - sorry: " + e.message )
+ end
+
+ raise Puppet::ParseError, ("validate_slength(): please pass a positive number as max_length") unless max_length > 0
+
+ case args[0]
+ when String
+ raise Puppet::ParseError, ("validate_slength(): #{args[0].inspect} is #{args[0].length} characters. It should have been less than or equal to #{max_length} characters") unless args[0].length <= max_length
+ when Array
+ args[0].each do |arg|
+ if arg.is_a?(String)
+ unless ( arg.is_a?(String) and arg.length <= max_length )
+ raise Puppet::ParseError, ("validate_slength(): #{arg.inspect} is #{arg.length} characters. It should have been less than or equal to #{max_length} characters")
+ end
+ else
+ raise Puppet::ParseError, ("validate_slength(): #{arg.inspect} is not a string, it's a #{arg.class}")
+ end
+ end
+ else
+ raise Puppet::ParseError, ("validate_slength(): please pass a string, or an array of strings - what you passed didn't work for me at all - #{args[0].class}")
+ end
+ end
+end

spec/unit/puppet/parser/functions/validate_slength_spec.rb

@@ -0,0 +1,52 @@
+#!/usr/bin/env rspec
+
+require 'spec_helper'
+
+describe "the validate_slength function" do
+ before :all do
+ Puppet::Parser::Functions.autoloader.loadall
+ end
+
+ let(:scope) { Puppet::Parser::Scope.new }
+
+ it "should exist" do
+ Puppet::Parser::Functions.function("validate_slength").should == "function_validate_slength"
+ end
+
+ it "should raise a ParseError if there is less than 2 arguments" do
+ expect { scope.function_validate_slength([]) }.to(raise_error(Puppet::ParseError))
+ expect { scope.function_validate_slength(["asdf"]) }.to(raise_error(Puppet::ParseError))
+ end
+
+ it "should raise a ParseError if argument 2 doesn't convert to a fixnum" do
+ expect { scope.function_validate_slength(["moo",["2"]]) }.to(raise_error(Puppet::ParseError, /Couldn't convert whatever you passed/))
+ end
+
+ it "should raise a ParseError if argument 2 converted, but to 0, e.g. a string" do
+ expect { scope.function_validate_slength(["moo","monkey"]) }.to(raise_error(Puppet::ParseError, /please pass a positive number as max_length/))
+ end
+
+ it "should raise a ParseError if argument 2 converted, but to 0" do
+ expect { scope.function_validate_slength(["moo","0"]) }.to(raise_error(Puppet::ParseError, /please pass a positive number as max_length/))
+ end
+
+ it "should fail if string greater then size" do
+ expect { scope.function_validate_slength(["test", 2]) }.to(raise_error(Puppet::ParseError, /It should have been less than or equal to/))
+ end
+
+ it "should fail if you pass an array of something other than strings" do
+ expect { scope.function_validate_slength([["moo",["moo"],Hash.new["moo" => 7]], 7]) }.to(raise_error(Puppet::ParseError, /is not a string, it's a/))
+ end
+
+ it "should fail if you pass something other than a string or array" do
+ expect { scope.function_validate_slength([Hash.new["moo" => "7"],6]) }.to(raise_error(Puppet::ParseError), /please pass a string, or an array of strings/)
+ end
+
+ it "should not fail if string is smaller or equal to size" do
+ expect { scope.function_validate_slength(["test", 5]) }.to_not(raise_error(Puppet::ParseError))
+ end
+
+ it "should not fail if array of string is are all smaller or equal to size" do
+ expect { scope.function_validate_slength([["moo","foo","bar"], 5]) }.to_not(raise_error(Puppet::ParseError))
+ end
+end