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| -rw-r--r-- | README.markdown | 6 | ||||
| -rw-r--r-- | lib/puppet/parser/functions/convert_base.rb | 35 | ||||
| -rw-r--r-- | spec/functions/convert_base_spec.rb | 24 |
3 files changed, 65 insertions, 0 deletions
diff --git a/README.markdown b/README.markdown index 591c27b..ccbceab 100644 --- a/README.markdown +++ b/README.markdown @@ -155,6 +155,12 @@ Appends the contents of multiple arrays onto the first array given. For example: * `concat(['1','2','3'],'4',['5','6','7'])` returns ['1','2','3','4','5','6','7']. *Type*: rvalue. +#### `convert_base` + +Converts a given integer or base 10 string representing an integer to a specified base, as a string. For example: + * `convert_base(5, 2)` results in: '101' + * `convert_base('254', '16')` results in: 'fe' + #### `count` If called with only an array, it counts the number of elements that are **not** nil/undef. If called with a second argument, counts the number of elements in an array that matches the second argument. *Type*: rvalue. diff --git a/lib/puppet/parser/functions/convert_base.rb b/lib/puppet/parser/functions/convert_base.rb new file mode 100644 index 0000000..0fcbafe --- /dev/null +++ b/lib/puppet/parser/functions/convert_base.rb @@ -0,0 +1,35 @@ +module Puppet::Parser::Functions + + newfunction(:convert_base, :type => :rvalue, :arity => 2, :doc => <<-'ENDHEREDOC') do |args| + + Converts a given integer or base 10 string representing an integer to a specified base, as a string. + + Usage: + + $binary_repr = convert_base(5, 2) # $binary_repr is now set to "101" + $hex_repr = convert_base("254", "16") # $hex_repr is now set to "fe" + + ENDHEREDOC + + raise Puppet::ParseError, ("convert_base(): First argument must be either a string or an integer") unless (args[0].is_a?(Integer) or args[0].is_a?(String)) + raise Puppet::ParseError, ("convert_base(): Second argument must be either a string or an integer") unless (args[1].is_a?(Integer) or args[1].is_a?(String)) + + if args[0].is_a?(String) + raise Puppet::ParseError, ("convert_base(): First argument must be an integer or a string corresponding to an integer in base 10") unless args[0] =~ /^[0-9]+$/ + end + + if args[1].is_a?(String) + raise Puppet::ParseError, ("convert_base(): First argument must be an integer or a string corresponding to an integer in base 10") unless args[1] =~ /^[0-9]+$/ + end + + number_to_convert = args[0] + new_base = args[1] + + number_to_convert = number_to_convert.to_i() + new_base = new_base.to_i() + + raise Puppet::ParseError, ("convert_base(): base must be at least 2 and must not be greater than 36") unless new_base >= 2 and new_base <= 36 + + return number_to_convert.to_s(new_base) + end +end diff --git a/spec/functions/convert_base_spec.rb b/spec/functions/convert_base_spec.rb new file mode 100644 index 0000000..8ab2284 --- /dev/null +++ b/spec/functions/convert_base_spec.rb @@ -0,0 +1,24 @@ +require 'spec_helper' + +describe 'convert_base' do + it { is_expected.not_to eq(nil) } + it { is_expected.to run.with_params().and_raise_error(ArgumentError) } + it { is_expected.to run.with_params("asdf").and_raise_error(ArgumentError) } + it { is_expected.to run.with_params("asdf","moo","cow").and_raise_error(ArgumentError) } + it { is_expected.to run.with_params(["1"],"2").and_raise_error(Puppet::ParseError, /argument must be either a string or an integer/) } + it { is_expected.to run.with_params("1",["2"]).and_raise_error(Puppet::ParseError, /argument must be either a string or an integer/) } + it { is_expected.to run.with_params("1",1).and_raise_error(Puppet::ParseError, /base must be at least 2 and must not be greater than 36/) } + it { is_expected.to run.with_params("1",37).and_raise_error(Puppet::ParseError, /base must be at least 2 and must not be greater than 36/) } + + it "should raise a ParseError if argument 1 is a string that does not correspond to an integer in base 10" do + is_expected.to run.with_params("ten",6).and_raise_error(Puppet::ParseError, /argument must be an integer or a string corresponding to an integer in base 10/) + end + + it "should raise a ParseError if argument 2 is a string and does not correspond to an integer in base 10" do + is_expected.to run.with_params(100,"hex").and_raise_error(Puppet::ParseError, /argument must be an integer or a string corresponding to an integer in base 10/) + end + + it { is_expected.to run.with_params("11",'16').and_return('b') } + it { is_expected.to run.with_params("35",'36').and_return('z') } + it { is_expected.to run.with_params(5, 2).and_return('101') } +end |