Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 40 insertions, 0 deletions

diff --git a/spec/mspec/lib/mspec/runner/actions/filter.rb b/spec/mspec/lib/mspec/runner/actions/filter.rb
new file mode 100644
index 0000000000..35899c8dc8
--- /dev/null
+++ b/spec/mspec/lib/mspec/runner/actions/filter.rb
@@ -0,0 +1,40 @@
+require 'mspec/runner/filters/match'
+
+# ActionFilter is a base class for actions that are triggered by
+# specs that match the filter. The filter may be specified by
+# strings that match spec descriptions or by tags for strings
+# that match spec descriptions.
+#
+# Unlike TagFilter and RegexpFilter, ActionFilter instances do
+# not affect the specs that are run. The filter is only used to
+# trigger the action.
+
+class ActionFilter
+  def initialize(tags=nil, descs=nil)
+    @tags = Array(tags)
+    descs = Array(descs)
+    @sfilter = descs.empty? ? nil : MatchFilter.new(nil, *descs)
+    @tfilter = nil
+  end
+
+  def ===(string)
+    @sfilter === string or @tfilter === string
+  end
+
+  def load
+    return if @tags.empty?
+
+    desc = MSpec.read_tags(@tags).map { |t| t.description }
+    return if desc.empty?
+
+    @tfilter = MatchFilter.new(nil, *desc)
+  end
+
+  def register
+    MSpec.register :load, self
+  end
+
+  def unregister
+    MSpec.unregister :load, self
+  end
+end