Rakefile in assert_value-1.4.1 vs Rakefile in assert_value-1.5

@@ -1,31 +1,46 @@
 require 'rake'
 require 'rake/testtask'
-require 'rdoc/task'
+begin
+  require 'rdoc/task'
+rescue LoadError
+end
+begin
+  require 'rspec/core/rake_task'
+rescue LoadError
+end
 require 'bundler/setup'
-require 'rspec/core/rake_task'
 
 Bundler::GemHelper.install_tasks
 
-desc 'Default: run unit tests.'
-task :default => :test
-
 desc 'Test assert_value.'
 Rake::TestTask.new(:test) do |t|
   t.libs << 'lib'
   t.pattern = 'test/**/*_test.rb'
   t.verbose = true
 end
 
-desc "Run the specs."
-RSpec::Core::RakeTask.new do |t|
-  t.pattern = "test/**/*_spec.rb"
+if defined?(RSpec)
+  desc "Run the specs."
+  RSpec::Core::RakeTask.new(:spec) do |t|
+    t.pattern = "test/**/*_spec.rb"
+  end
 end
 
-desc 'Generate documentation for assert_value.'
-Rake::RDocTask.new(:rdoc) do |rdoc|
-  rdoc.rdoc_dir = 'rdoc'
-  rdoc.title    = 'assert_value'
-  rdoc.options << '--line-numbers' << '--inline-source'
-  rdoc.rdoc_files.include('README')
-  rdoc.rdoc_files.include('lib/**/*.rb')
+if defined?(RSpec) and RUBY_VERSION > '1.9.3'
+  desc 'Default: run specs.'
+  task :default => :spec
+else
+  desc 'Default: run unit tests.'
+  task :default => :test
+end
+
+if defined?(Rake::RDocTask)
+  desc 'Generate documentation for assert_value.'
+  Rake::RDocTask.new(:rdoc) do |rdoc|
+    rdoc.rdoc_dir = 'rdoc'
+    rdoc.title    = 'assert_value'
+    rdoc.options << '--line-numbers' << '--inline-source'
+    rdoc.rdoc_files.include('README')
+    rdoc.rdoc_files.include('lib/**/*.rb')
+  end
 end