1 files changed, 47 insertions, 0 deletions
diff --git a/spec/mspec/lib/mspec/matchers/match_yaml.rb b/spec/mspec/lib/mspec/matchers/match_yaml.rb
new file mode 100644
index 0000000000..542dece2b4
--- /dev/null
+++ b/spec/mspec/lib/mspec/matchers/match_yaml.rb
@@ -0,0 +1,47 @@
+class MatchYAMLMatcher
+
+  def initialize(expected)
+    if valid_yaml?(expected)
+      @expected = expected
+    else
+      @expected = expected.to_yaml
+    end
+  end
+
+  def matches?(actual)
+    @actual = actual
+    clean_yaml(@actual) == clean_yaml(@expected)
+  end
+
+  def failure_message
+    ["Expected #{@actual.inspect}", " to match #{@expected.inspect}"]
+  end
+
+  def negative_failure_message
+    ["Expected #{@actual.inspect}", " to match #{@expected.inspect}"]
+  end
+
+  protected
+
+  def clean_yaml(yaml)
+    yaml.gsub(/([^-]|^---)\s+\n/, "\\1\n").sub(/\n\.\.\.\n$/, "\n")
+  end
+
+  def valid_yaml?(obj)
+    require 'yaml'
+    begin
+      YAML.load(obj)
+    rescue
+      false
+    else
+      true
+    end
+  end
+end
+
+class Object
+  def match_yaml(expected)
+    MatchYAMLMatcher.new(expected)
+  end
+end
+