From 93043d002a5ec8646cbd9d5658434848a1d07a49 Mon Sep 17 00:00:00 2001
From: Rick Waldron <waldron.rick@gmail.com>
Date: Wed, 13 Feb 2013 12:14:20 -0500
Subject: [PATCH] Refactor: Data.prototype.access. Thanks to @RubyLouvre and
 @gibson042. Closes #1167

---
 src/data.js       | 41 +++++++++++++++++++++++++----------------
 test/unit/data.js | 34 ++++++++++++++++++++++++++--------
 2 files changed, 51 insertions(+), 24 deletions(-)

diff --git a/src/data.js b/src/data.js
index f0f955c3c..f0699d2a7 100644
--- a/src/data.js
+++ b/src/data.js
@@ -108,24 +108,33 @@ Data.prototype = {
 			cache : cache[ key ];
 	},
 	access: function( owner, key, value ) {
-		if ( value === undefined && (key && typeof key !== "object") ) {
-			// Assume this is a request to read the cached data
+		// In cases where either:
+		//
+		//   1. No key was specified
+		//   2. A string key was specified, but no value provided
+		//
+		// Take the "read" path and allow the get method to determine
+		// which value to return, respectively either:
+		//
+		//   1. The entire cache object
+		//   2. The data stored at the key
+		//
+		if ( key === undefined ||
+				((key && typeof key === "string") && value === undefined) ) {
 			return this.get( owner, key );
-		} else {
-
-			// If only an owner was specified, return the entire
-			// cache object.
-			if ( key === undefined ) {
-				return this.get( owner );
-			}
-
-			// Allow setting or extending (existing objects) with an
-			// object of properties, or a key and val
-			this.set( owner, key, value );
-			return value !== undefined ? value : key;
 		}
-		// Otherwise, this is a read request.
-		return this.get( owner, key );
+
+		// [*]When the key is not a string, or both a key and value
+		// are specified, set or extend (existing objects) with either:
+		//
+		//   1. An object of properties
+		//   2. A key and value
+		//
+		this.set( owner, key, value );
+
+		// Since the "set" path can have two possible entry points
+		// return the expected data based on which path was taken[*]
+		return value !== undefined ? value : key;
 	},
 	remove: function( owner, key ) {
 		var i, l, name,
diff --git a/test/unit/data.js b/test/unit/data.js
index 4307ac2dc..64cd04e90 100644
--- a/test/unit/data.js
+++ b/test/unit/data.js
@@ -7,29 +7,47 @@ test("expando", function(){
 });
 
 test( "jQuery.data & removeData, expected returns", function() {
-	expect(2);
+	expect(4);
+	var elem = document.body;
 
 	equal(
-		jQuery.data( document.body, "hello", "world" ), "world",
+		jQuery.data( elem, "hello", "world" ), "world",
 		"jQuery.data( elem, key, value ) returns value"
 	);
 	equal(
-		jQuery.removeData( document.body, "hello" ), undefined,
+		jQuery.data( elem, "hello" ), "world",
+		"jQuery.data( elem, key ) returns value"
+	);
+	deepEqual(
+		jQuery.data( elem, { goodnight: "moon" }), { goodnight: "moon" },
+		"jQuery.data( elem, key, obj ) returns obj"
+	);
+	equal(
+		jQuery.removeData( elem, "hello" ), undefined,
 		"jQuery.removeData( elem, key, value ) returns undefined"
 	);
 
 });
 
 test( "jQuery._data & _removeData, expected returns", function() {
-	expect(2);
+	expect(4);
+	var elem = document.body;
 
 	equal(
-		jQuery._data( document.body, "hello", "world" ), "world",
-		"jQuery.data( elem, key, value ) returns value"
+		jQuery._data( elem, "hello", "world" ), "world",
+		"jQuery._data( elem, key, value ) returns value"
 	);
 	equal(
-		jQuery._removeData( document.body, "hello" ), undefined,
-		"jQuery.removeData( elem, key, value ) returns undefined"
+		jQuery._data( elem, "hello" ), "world",
+		"jQuery._data( elem, key ) returns value"
+	);
+	deepEqual(
+		jQuery._data( elem, { goodnight: "moon" }), { goodnight: "moon" },
+		"jQuery._data( elem, obj ) returns obj"
+	);
+	equal(
+		jQuery._removeData( elem, "hello" ), undefined,
+		"jQuery._removeData( elem, key, value ) returns undefined"
 	);
 });
 
-- 
2.39.5