Fix bug when accessing .data() on an empty set. Return null rather than throwing...

[jquery.git] / test / unit / data.js

diff --git a/test/unit/data.js b/test/unit/data.js
index 058f23f..54a89d9 100644 (file)
--- a/test/unit/data.js
+++ b/test/unit/data.js
@@ -2,25 +2,25 @@ module("data");
 
 test("expando", function(){
        expect(7);
-       
+
        equals("expando" in jQuery, true, "jQuery is exposing the expando");
-       
+
        var obj = {};
        jQuery.data(obj);
        equals( jQuery.expando in obj, true, "jQuery.data adds an expando to the object" );
        equals( typeof obj[jQuery.expando], "function", "jQuery.data adds an expando to the object as a function" );
 
-       obj = {};       
+       obj = {};
        jQuery.data(obj, 'test');
        equals( jQuery.expando in obj, false, "jQuery.data did not add an expando to the object" );
 
        obj = {};
        jQuery.data(obj, "foo", "bar");
        equals( jQuery.expando in obj, true, "jQuery.data added an expando to the object" );
-       
+
        var id = obj[jQuery.expando]();
        equals( id in jQuery.cache, false, "jQuery.data did not add an entry to jQuery.cache" );
-       
+
        equals( id.foo, "bar", "jQuery.data worked correctly" );
 });
 
@@ -29,21 +29,21 @@ test("jQuery.data", function() {
        var div = document.createElement("div");
 
        ok( jQuery.data(div, "test") === undefined, "Check for no data exists" );
-       
+
        jQuery.data(div, "test", "success");
        equals( jQuery.data(div, "test"), "success", "Check for added data" );
 
        ok( jQuery.data(div, "notexist") === undefined, "Check for no data exists" );
-       
+
        var data = jQuery.data(div);
        same( data, { "test": "success" }, "Return complete data set" );
-       
+
        jQuery.data(div, "test", "overwritten");
        equals( jQuery.data(div, "test"), "overwritten", "Check for overwritten data" );
-       
+
        jQuery.data(div, "test", undefined);
        equals( jQuery.data(div, "test"), "overwritten", "Check that data wasn't removed");
-       
+
        jQuery.data(div, "test", null);
        ok( jQuery.data(div, "test") === null, "Check for null data");
 
@@ -65,7 +65,10 @@ test(".data()", function() {
 
        var div = jQuery("#foo");
        div.data("test", "success");
-       same( div.data(), {test: "success"}, "data() get the entire data object" )
+       same( div.data(), {test: "success"}, "data() get the entire data object" );
+
+       var nodiv = jQuery("#unfound");
+       equals( nodiv.data(), null, "data() on empty set returns null" );
 })
 
 test(".data(String) and .data(String, Object)", function() {
@@ -145,20 +148,20 @@ test(".data(String) and .data(String, Object)", function() {
        equals( div.data("test"), "testroot", "Check for original data" );
        equals( div.data("test.foo"), "testfoo", "Check for namespaced data" );
        equals( div.data("test.bar"), "testroot", "Check for unmatched namespace" );
-       
+
        // #3748
        var $elem = jQuery({});
        equals( $elem.data('nothing'), undefined, "Non-existent data returns undefined");
        equals( $elem.data('null',null).data('null'), null, "null's are preserved");
        equals( $elem.data('emptyString','').data('emptyString'), '', "Empty strings are preserved");
        equals( $elem.data('false',false).data('false'), false, "false's are preserved");
-       
+
        // Clean up
        $elem.removeData();
 });
 
 test("data-* attributes", function() {
-       expect(25);
+       expect(27);
        var div = jQuery("<div>"),
                child = jQuery("<div data-myobj='old data' data-ignored=\"DOM\"></div>");
                
@@ -189,6 +192,8 @@ test("data-* attributes", function() {
                .attr("data-pointbad2", "-.")
                .attr("data-badjson", "{123}")
                .attr("data-badjson2", "[abc]")
+               .attr("data-empty", "")
+               .attr("data-space", " ")
                .attr("data-null", "null")
                .attr("data-string", "test");
        
@@ -201,6 +206,8 @@ test("data-* attributes", function() {
        strictEqual( child.data('pointbad2'), "-.", "Bad number read from attribute");
        strictEqual( child.data('badjson'), "{123}", "Bad number read from attribute");
        strictEqual( child.data('badjson2'), "[abc]", "Bad number read from attribute");
+       strictEqual( child.data('empty'), "", "Empty string read from attribute");
+       strictEqual( child.data('space'), " ", "Empty string read from attribute");
        strictEqual( child.data('null'), null, "Primitive null read from attribute");
        strictEqual( child.data('string'), "test", "Typical string read from attribute");