1 files changed, 37 insertions, 0 deletions
diff --git a/test/lib/spec/matchers/be_close.rb b/test/lib/spec/matchers/be_close.rb
new file mode 100644
index 000000000..b09e3fd2f
--- /dev/null
+++ b/test/lib/spec/matchers/be_close.rb
@@ -0,0 +1,37 @@
+module Spec
+  module Matchers
+
+    class BeClose #:nodoc:
+      def initialize(expected, delta)
+        @expected = expected
+        @delta = delta
+      end
+      
+      def matches?(actual)
+        @actual = actual
+        (@actual - @expected).abs < @delta
+      end
+      
+      def failure_message
+        "expected #{@expected} +/- (<#{@delta}), got #{@actual}"
+      end
+      
+      def description
+        "be close to #{@expected} (+- #{@delta})"
+      end
+    end
+    
+    # :call-seq:
+    #   should be_close(expected, delta)
+    #   should_not be_close(expected, delta)
+    #
+    # Passes if actual == expected +/- delta
+    #
+    # == Example
+    #
+    #   result.should be_close(3.0, 0.5)
+    def be_close(expected, delta)
+      Matchers::BeClose.new(expected, delta)
+    end
+  end
+end
+\ No newline at end of file