1 files changed, 47 insertions, 0 deletions
diff --git a/test/lib/spec/matchers/satisfy.rb b/test/lib/spec/matchers/satisfy.rb
new file mode 100644
index 000000000..6c0ca95bc
--- /dev/null
+++ b/test/lib/spec/matchers/satisfy.rb
@@ -0,0 +1,47 @@
+module Spec
+  module Matchers
+    
+    class Satisfy #:nodoc:
+      def initialize(&block)
+        @block = block
+      end
+      
+      def matches?(actual, &block)
+        @block = block if block
+        @actual = actual
+        @block.call(actual)
+      end
+      
+      def failure_message
+        "expected #{@actual} to satisfy block"
+      end
+
+      def negative_failure_message
+        "expected #{@actual} not to satisfy block"
+      end
+    end
+    
+    # :call-seq:
+    #   should satisfy {}
+    #   should_not satisfy {}
+    #
+    # Passes if the submitted block returns true. Yields target to the
+    # block.
+    #
+    # Generally speaking, this should be thought of as a last resort when
+    # you can't find any other way to specify the behaviour you wish to
+    # specify.
+    #
+    # If you do find yourself in such a situation, you could always write
+    # a custom matcher, which would likely make your specs more expressive.
+    #
+    # == Examples
+    #
+    #   5.should satisfy { |n|
+    #     n > 3
+    #   }
+    def satisfy(&block)
+      Matchers::Satisfy.new(&block)
+    end
+  end
+end