1 files changed, 20 insertions, 0 deletions
diff --git a/spec/mspec/lib/mspec/matchers/be_true_or_false.rb b/spec/mspec/lib/mspec/matchers/be_true_or_false.rb
new file mode 100644
index 0000000000..b2262779ed
--- /dev/null
+++ b/spec/mspec/lib/mspec/matchers/be_true_or_false.rb
@@ -0,0 +1,20 @@
+class BeTrueOrFalseMatcher
+  def matches?(actual)
+    @actual = actual
+    @actual == true || @actual == false
+  end
+
+  def failure_message
+    ["Expected #{@actual.inspect}", "to be true or false"]
+  end
+
+  def negative_failure_message
+    ["Expected #{@actual.inspect}", "not to be true or false"]
+  end
+end
+
+class Object
+  def be_true_or_false
+    BeTrueOrFalseMatcher.new
+  end
+end