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, 24 insertions, 0 deletions

diff --git a/spec/mspec/lib/mspec/matchers/respond_to.rb b/spec/mspec/lib/mspec/matchers/respond_to.rb
new file mode 100644
index 0000000000..2aa3ab14d1
--- /dev/null
+++ b/spec/mspec/lib/mspec/matchers/respond_to.rb
@@ -0,0 +1,24 @@
+class RespondToMatcher
+  def initialize(expected)
+    @expected = expected
+  end
+
+  def matches?(actual)
+    @actual = actual
+    @actual.respond_to?(@expected)
+  end
+
+  def failure_message
+    ["Expected #{@actual.inspect} (#{@actual.class})", "to respond to #{@expected}"]
+  end
+
+  def negative_failure_message
+    ["Expected #{@actual.inspect} (#{@actual.class})", "not to respond to #{@expected}"]
+  end
+end
+
+class Object
+  def respond_to(expected)
+    RespondToMatcher.new(expected)
+  end
+end