1 files changed, 24 insertions, 0 deletions
diff --git a/spec/mspec/lib/mspec/matchers/variable.rb b/spec/mspec/lib/mspec/matchers/variable.rb
new file mode 100644
index 0000000000..4d801ea337
--- /dev/null
+++ b/spec/mspec/lib/mspec/matchers/variable.rb
@@ -0,0 +1,24 @@
+class VariableMatcher
+  class << self
+    attr_accessor :variables_method, :description
+  end
+
+  def initialize(variable)
+    @variable = variable.to_sym
+  end
+
+  def matches?(object)
+    @object = object
+    @object.send(self.class.variables_method).include? @variable
+  end
+
+  def failure_message
+    ["Expected #{@object} to have #{self.class.description} '#{@variable}'",
+     "but it does not"]
+  end
+
+  def negative_failure_message
+    ["Expected #{@object} NOT to have #{self.class.description} '#{@variable}'",
+     "but it does"]
+  end
+end