Adding base64 function

Adding base64 function and spec test.  Included a bonus fix to
validate_slength_spec.rb to put the expectation message in the right
place.

4 files changed, 81 insertions, 1 deletions

diff --git a/README.markdown b/README.markdown
index 8a53f31..0e40f51 100644
--- a/README.markdown
+++ b/README.markdown
@@ -83,6 +83,15 @@ converted to arrays of alternating keys and values.
 
 - *Type*: rvalue
 
+base64
+--------
+Converts a string to and from base64 encoding.
+Requires an action ['encode','decode'] and either a plain or base64 encoded
+string
+
+
+- *Type*: rvalue
+
 bool2num
 --------
 Converts a boolean to a number. Converts the values:
diff --git a/lib/puppet/parser/functions/base64.rb b/lib/puppet/parser/functions/base64.rb
new file mode 100644
index 0000000..d9a590a
--- /dev/null
+++ b/lib/puppet/parser/functions/base64.rb
@@ -0,0 +1,37 @@
+module Puppet::Parser::Functions
+ 
+  newfunction(:base64, :type => :rvalue, :doc => <<-'ENDHEREDOC') do |args|
+
+    Base64 encode or decode a string based on the command and the string submitted
+
+    Usage:
+
+      $encodestring = base64('encode','thestring')
+      $decodestring = base64('decode','dGhlc3RyaW5n')
+
+    ENDHEREDOC
+ 
+    require 'base64'
+ 
+    raise Puppet::ParseError, ("base64(): Wrong number of arguments (#{args.length}; must be = 2)") unless args.length == 2
+
+    actions = ['encode','decode']
+
+    unless actions.include?(args[0])
+      raise Puppet::ParseError, ("base64(): the first argument must be one of 'encode' or 'decode'")
+    end
+ 
+    unless args[1].is_a?(String)
+      raise Puppet::ParseError, ("base64(): the second argument must be a string to base64")
+    end
+ 
+    case args[0]
+      when 'encode'
+        result = Base64.encode64(args[1])
+      when 'decode'
+        result = Base64.decode64(args[1])
+    end
+ 
+    return result
+  end
+end
diff --git a/spec/unit/puppet/parser/functions/base64_spec.rb b/spec/unit/puppet/parser/functions/base64_spec.rb
new file mode 100755
index 0000000..5faa5e6
--- /dev/null
+++ b/spec/unit/puppet/parser/functions/base64_spec.rb
@@ -0,0 +1,34 @@
+#! /usr/bin/env ruby -S rspec
+
+require 'spec_helper'
+
+describe "the base64 function" do
+  let(:scope) { PuppetlabsSpec::PuppetInternals.scope }
+
+  it "should exist" do
+    Puppet::Parser::Functions.function("base64").should == "function_base64"
+  end
+
+  it "should raise a ParseError if there are other than 2 arguments" do
+    expect { scope.function_base64([]) }.to(raise_error(Puppet::ParseError))
+    expect { scope.function_base64(["asdf"]) }.to(raise_error(Puppet::ParseError))
+    expect { scope.function_base64(["asdf","moo","cow"]) }.to(raise_error(Puppet::ParseError))
+  end
+
+  it "should raise a ParseError if argument 1 isn't 'encode' or 'decode'" do
+    expect { scope.function_base64(["bees","astring"]) }.to(raise_error(Puppet::ParseError, /first argument must be one of/))
+  end
+
+  it "should raise a ParseError if argument 2 isn't a string" do
+    expect { scope.function_base64(["encode",["2"]]) }.to(raise_error(Puppet::ParseError, /second argument must be a string/))
+  end
+
+  it "should encode a encoded string" do
+    result = scope.function_base64(["encode",'thestring'])
+    result.should =~ /\AdGhlc3RyaW5n\n\Z/
+  end
+  it "should decode a base64 encoded string" do
+    result = scope.function_base64(["decode",'dGhlc3RyaW5n'])
+    result.should == 'thestring'
+  end
+end
diff --git a/spec/unit/puppet/parser/functions/validate_slength_spec.rb b/spec/unit/puppet/parser/functions/validate_slength_spec.rb
index eccf908..b363e7a 100755
--- a/spec/unit/puppet/parser/functions/validate_slength_spec.rb
+++ b/spec/unit/puppet/parser/functions/validate_slength_spec.rb
@@ -35,7 +35,7 @@ describe "the validate_slength function" do
   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/)
+    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