From e0d3ceb08f35b60558fee3e418b0be83f451ccb5 Mon Sep 17 00:00:00 2001
From: Marcos Tapajos <tapajos@gmail.com>
Date: Sun, 2 Oct 2011 02:41:06 -0300
Subject: [PATCH] Specs for Enumerable#one?

---
 core/enumerable/one_spec.rb | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/core/enumerable/one_spec.rb b/core/enumerable/one_spec.rb
index e8caea42ed..4c13a6845a 100644
--- a/core/enumerable/one_spec.rb
+++ b/core/enumerable/one_spec.rb
@@ -1,5 +1,29 @@
 require File.expand_path('../../../spec_helper', __FILE__)
 
 describe "Enumerable#one?" do
-  it "needs to be reviewed for spec completeness"
+  ruby_version_is '1.8.7' do
+    describe "when block is given" do
+      it "returns true if block returns true once" do
+        ["ant", "bear", "cat"].one?{ |word| word.length == 4 }.should be_true
+      end
+      
+      it "returns false if block evaluation are true more than once" do
+        ["ant", "bear"].one? { |word| word.length > 4 }.should be_false
+      end
+    end
+    
+    describe "when block isn't given" do
+      it "returns true if only one element is true" do
+        [false, nil, true].one?.should be_true
+      end
+      
+      it "returns false if two elements are true" do
+        [false, true, nil, true].one?.should be_false
+      end
+      
+      it "returns false if two elements aren't false or nil" do
+        [false, true, nil, 99].one?.should be_false
+      end
+    end
+  end
 end