Added string or symbol helper for MSpec.

mspec/lib/mspec/helpers.rb

@@ -16,4 +16,5 @@
 require 'mspec/helpers/numeric'
 require 'mspec/helpers/ruby_exe'
 require 'mspec/helpers/scratch'
+require 'mspec/helpers/stasy'
 require 'mspec/helpers/tmp'

mspec/lib/mspec/helpers/stasy.rb

@@ -0,0 +1,33 @@
+require 'mspec/utils/version'
+require 'mspec/guards/guard'
+
+class Object
+  # Accepts either a single argument or an Array of arguments. If RUBY_VERSION
+  # is less than 1.9, converts the argument(s) to Strings; otherwise, converts
+  # the argument(s) to Symbols.
+  #
+  # If one argument is passed, the converted argument is returned. If an Array
+  # is passed, an Array is returned.
+  #
+  # For example, if RUBY_VERSION == 1.8.7
+  #
+  #   stasy(:some) => "some"
+  #   stasy("nom") => "nom"
+  #
+  # while if RUBY_VERSION == 1.9.0
+  #
+  #   stasy(:some) => :some
+  #   stasy("nom") => :nom
+
+  def stasy(one, *rest)
+    era = SpecVersion.new(SpecGuard.ruby_version) < "1.9"
+    convert = era ? :to_s : :to_sym
+
+    one = one.send convert
+    if rest.empty?
+      one
+    else
+      [one].concat rest.map { |x| x.send convert }
+    end
+  end
+end

mspec/spec/helpers/stasy_spec.rb

@@ -0,0 +1,58 @@
+require File.dirname(__FILE__) + '/../spec_helper'
+require 'mspec/helpers/stasy'
+
+describe Object, "#stasy when RUBY_VERSION < 1.9" do
+  before :all do
+    @ruby_version = Object.const_get :RUBY_VERSION
+
+    Object.const_set :RUBY_VERSION, "1.8.7"
+  end
+
+  after :all do
+    Object.const_set :RUBY_VERSION, @ruby_version
+  end
+
+  it "returns a String when passed a String" do
+    stasy("nom").should == "nom"
+  end
+
+  it "returns a String when passed a Symbol" do
+    stasy(:some).should == "some"
+  end
+
+  it "returns an Array of Strings when passed an Array of Strings" do
+    stasy("nom", "nom").should == ["nom", "nom"]
+  end
+
+  it "returns an Array of Strings when passed an Array of Symbols" do
+    stasy(:some, :thing).should == ["some", "thing"]
+  end
+end
+
+describe Object, "#stasy when RUBY_VERSION >= 1.9.0" do
+  before :all do
+    @ruby_version = Object.const_get :RUBY_VERSION
+
+    Object.const_set :RUBY_VERSION, "1.9.0"
+  end
+
+  after :all do
+    Object.const_set :RUBY_VERSION, @ruby_version
+  end
+
+  it "returns a Symbol when passed a String" do
+    stasy("nom").should == :nom
+  end
+
+  it "returns a Symbol when passed a Symbol" do
+    stasy(:some).should == :some
+  end
+
+  it "returns an Array of Symbols when passed an Array of Strings" do
+    stasy("some", "thing").should == [:some, :thing]
+  end
+
+  it "returns an Array of Symbols when passed an Array of Symbols" do
+    stasy(:nom, :nom).should == [:nom, :nom]
+  end
+end