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| Y.isEmpty = function (o) { | |
| if (o != null) { | |
| if (Y.Node) { | |
| o = (o._node || o._nodes || o); | |
| } | |
| if (o.nodeType) { | |
| o = o.childNodes; | |
| } | |
| if (Y.Lang.isArray(o)) { | |
| return !o.length; | |
| } | |
| if (Y.Lang.isObject(o)) { | |
| if ('__count__' in o) { | |
| return !o.__count__; | |
| } else { | |
| for (var k in o) { | |
| // own properties are enumerated first | |
| return !o.hasOwnProperty(k); | |
| } | |
| } | |
| } | |
| return (Y.Lang.isString(o)) ? !o.length : false; | |
| } | |
| return true; | |
| }; |
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| new Y.Test.Case({ | |
| name : "Y.isEmpty Tests", | |
| "boolean should be false" : function() { | |
| Y.Assert.isFalse(Y.isEmpty(false)); | |
| }, | |
| "empty string should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty("")); | |
| }, | |
| "string should be false" : function() { | |
| Y.Assert.isFalse(Y.isEmpty("hi")); | |
| }, | |
| "object with no properties should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty({ })); | |
| }, | |
| "object with properties should be false" : function() { | |
| Y.Assert.isFalse(Y.isEmpty({ "wooga" : 1, "fooga" : 2 })); | |
| }, | |
| "empty array should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty([ ])); | |
| }, | |
| "non-empty array should be false" : function() { | |
| Y.Assert.isFalse(Y.isEmpty([ 1, 2, 3 ])); | |
| }, | |
| "empty array-like object should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty(arguments)); | |
| }, | |
| "non-empty array-like object should be false" : function() { | |
| var func = (function(a, b) { | |
| Y.Assert.isFalse(Y.isEmpty(arguments)); | |
| })(1, 2); | |
| }, | |
| "empty node should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty(Y.one("#empty"))); | |
| }, | |
| "non-empty node should be false" : function() { | |
| Y.Assert.isFalse(Y.isEmpty(Y.one("#non-empty"))); | |
| }, | |
| "empty nodelist should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty(Y.all("#non-existant-id"))); | |
| }, | |
| "non-empty nodelist should be false" : function() { | |
| Y.Assert.isFalse(Y.isEmpty(Y.all("#non-empty"))); | |
| }, | |
| "empty YUI object constructor created object should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty(Y.Object({ }))); | |
| }, | |
| "non-empty YUI object constructor created object should be true" : function() { | |
| Y.Assert.isTrue(Y.isEmpty(Y.Object({ "booga" : 1 }))); | |
| } | |
| }); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Y.isEmpty Tests</title> | |
| <meta charset="utf-8" /> | |
| </head> | |
| <body lang="en-US"> | |
| <div id="empty"></div> | |
| <div id="non-empty"> | |
| <p></p> | |
| </div> | |
| </body> | |
| </html> |
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