Add isunit function. fixes less#1298

lukeapage · lukeapage · commit 572b45a94b6a · 2013-04-29T16:28:20.000+01:00
diff --git a/lib/less/functions.js b/lib/less/functions.js
@@ -291,13 +291,16 @@ tree.functions = {
         return this._isa(n, tree.URL);
     },
     ispixel: function (n) {
-        return (n instanceof tree.Dimension) && n.unit.is('px') ? tree.True : tree.False;
+        return this.isunit(n, 'px');
     },
     ispercentage: function (n) {
-        return (n instanceof tree.Dimension) && n.unit.is('%') ? tree.True : tree.False;
+        return this.isunit(n, '%');
     },
     isem: function (n) {
-        return (n instanceof tree.Dimension) && n.unit.is('em') ? tree.True : tree.False;
+        return this.isunit(n, 'em');
+    },
+    isunit: function (n, unit) {
+        return (n instanceof tree.Dimension) && n.unit.is(unit.value || unit) ? tree.True : tree.False;
     },
     _isa: function (n, Type) {
         return (n instanceof Type) ? tree.True : tree.False;
diff --git a/test/css/functions.css b/test/css/functions.css
@@ -107,6 +107,7 @@
   pixel: true;
   percent: true;
   em: true;
+  cat: true;
 }
 #alpha {
   alpha: rgba(153, 94, 51, 0.6);
diff --git a/test/less/functions.less b/test/less/functions.less
@@ -116,6 +116,7 @@
     pixel: ispixel(32px);
     percent: ispercentage(32%);
     em: isem(32em);
+    cat: isunit(32cat, cat);
   }
 }
 
