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Fix #13150, .has() w/o args checks for any callbacks. Close gh-1111.

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adamcoulombe 2013-01-03 17:05:00 -05:00 committed by Dave Methvin
parent 64b55f0b79
commit 54fc5fdfa2
2 changed files with 50 additions and 2 deletions
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5
src/callbacks.js
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@ -137,9 +137,10 @@ jQuery.Callbacks = function( options ) {
}
return this;
},
// Control if a given callback is in the list
// Check if a given callback is in the list.
// If no argument is given, return whether or not list has callbacks attached.
has: function( fn ) {
return jQuery.inArray( fn, list ) > -1;
return fn ? jQuery.inArray( fn, list ) > -1 : !!( list && list.length );
},
// Remove all callbacks from the list
empty: function() {

47
test/unit/callbacks.js
View File

@ -269,6 +269,53 @@ test( "jQuery.Callbacks.remove - should remove all instances", function() {
}).remove( fn ).fire();
});
test( "jQuery.Callbacks.has", function() {
expect( 13 );
var cb = jQuery.Callbacks();
function getA() {
return "A";
}
function getB() {
return "B";
}
function getC() {
return "C";
}
cb.add(getA, getB, getC);
strictEqual( cb.has(), true, "No arguments to .has() returns whether callback function(s) are attached or not" );
strictEqual( cb.has(getA), true, "Check if a specific callback function is in the Callbacks list" );
cb.remove(getB);
strictEqual( cb.has(getB), false, "Remove a specific callback function and make sure its no longer there" );
strictEqual( cb.has(getA), true, "Remove a specific callback function and make sure other callback function is still there" );
cb.empty();
strictEqual( cb.has(), false, "Empty list and make sure there are no callback function(s)" );
strictEqual( cb.has(getA), false, "Check for a specific function in an empty() list" );
cb.add(getA, getB, function(){
strictEqual( cb.has(), true, "Check if list has callback function(s) from within a callback function" );
strictEqual( cb.has(getA), true, "Check if list has a specific callback from within a callback function" );
}).fire();
strictEqual( cb.has(), true, "Callbacks list has callback function(s) after firing" );
cb.disable();
strictEqual( cb.has(), false, "disabled() list has no callback functions (returns false)" );
strictEqual( cb.has(getA), false, "Check for a specific function in a disabled() list" );
cb = jQuery.Callbacks("unique");
cb.add(getA);
cb.add(getA);
strictEqual( cb.has(), true, "Check if unique list has callback function(s) attached" );
cb.lock();
strictEqual( cb.has(), false, "locked() list is empty and returns false" );
});
test( "jQuery.Callbacks() - adding a string doesn't cause a stack overflow", function() {
expect( 1 );