1 files changed, 43 insertions, 0 deletions
diff --git a/spec/mspec/lib/mspec/guards/feature.rb b/spec/mspec/lib/mspec/guards/feature.rb
new file mode 100644
index 0000000000..346212bda0
--- /dev/null
+++ b/spec/mspec/lib/mspec/guards/feature.rb
@@ -0,0 +1,43 @@
+require 'mspec/guards/guard'
+
+class FeatureGuard < SpecGuard
+  def self.enabled?(*features)
+    new(*features).match?
+  end
+
+  def match?
+    @parameters.all? { |f| MSpec.feature_enabled? f }
+  end
+end
+
+class Object
+  # Provides better documentation in the specs by
+  # naming sets of features that work together as
+  # a whole. Examples include :encoding, :fiber,
+  # :continuation, :fork.
+  #
+  # Usage example:
+  #
+  #   with_feature :encoding do
+  #     # specs for a method that provides aspects
+  #     # of the encoding feature
+  #   end
+  #
+  # Multiple features must all be enabled for the
+  # guard to run:
+  #
+  #   with_feature :one, :two do
+  #     # these specs will run if features :one AND
+  #     # :two are enabled.
+  #   end
+  #
+  # The implementation must explicitly enable a feature
+  # by adding code like the following to the .mspec
+  # configuration file:
+  #
+  #   MSpec.enable_feature :encoding
+  #
+  def with_feature(*features, &block)
+    FeatureGuard.new(*features).run_if(:with_feature, &block)
+  end
+end