add equals() function to OpenLayers.Bounds. plus test

git-svn-id: http://svn.openlayers.org/trunk/openlayers@389 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -267,6 +267,18 @@ OpenLayers.Bounds.prototype = {
                                      this.right, this.top);
     },
 
+    /** 
+    * @param {OpenLayers.Bounds} bounds
+    * @returns Boolean value indicating whether the passed-in OpenLayers.Bounds
+    *          object has the same left, right, top, bottom components as this
+    *
+    * @type bool
+    */
+    equals:function(bounds) {
+        return ((this.left == bounds.left) && (this.right == bounds.right) &&
+                (this.top == bounds.top) && (this.bottom == bounds.bottom));
+    },
+
     /** 
     * @return String representation of OpenLayers.Bounds object. 
     *         (ex.<i>"left-bottom=(5,42) right-top=(10,45)"</i>)

tests/test_Bounds.html

@@ -164,6 +164,17 @@
         t.eq( OpenLayers.Bounds.oppositeQuadrant("bl"), "tr", "OpenLayers.Bounds.oppositeQuadrant returns 'tr' for 'bl'");
         t.eq( OpenLayers.Bounds.oppositeQuadrant("br"), "tl", "OpenLayers.Bounds.oppositeQuadrant returns 'tl' for 'br'");
      }
+
+     function test_11_Bounds_equals(t) {
+         t.plan( 2 );
+         var boundsA = new OpenLayers.Bounds(1,2,3,4);
+         var boundsB = new OpenLayers.Bounds(1,2,3,4);
+         var boundsC = new OpenLayers.Bounds(1,5,3,4);
+         
+         t.ok( boundsA.equals(boundsB), "equals() returns true on two equal bounds." );
+         t.ok( !boundsA.equals(boundsC), "equals() returns false on two different bounds." );
+     }
+
   // -->
   </script>
 </head>