/*!
 * Ext JS Library 3.2.1
 * Copyright(c) 2006-2010 Ext JS, Inc.
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
Ext.test.session.addTest('Function', {

    name: 'Global Function Decorators',
    
    planned: 71,
    
    // 3
    test_createCallback: function(){
        var fn = function(a, b){
            Y.Assert.areEqual('a', a, 'Test passed param');
            Y.Assert.areEqual('b', b, 'Test passed param');
            return 'x';
        };
        
        var cb = fn.createCallback('a', 'b'),
            rt = cb(); // does not accept params
        Y.Assert.areEqual('x', rt, 'Test return value of callback');
    },
    
    // 24
    test_createDelegate: function(){
        var scope = {
            foo: 'bar'
        };
        
        var fn = function(a, b, c){
            Y.Assert.areEqual(scope, this, 'Test if "this" is correct');
            Y.Assert.areEqual('bar', this.foo, 'Test if property matches');
            Y.Assert.areEqual('a', a, 'Test passed param');
            Y.Assert.areEqual('b', b, 'Test passed param');
            Y.Assert.areEqual('c', c, 'Test passed param');
            return 'x';
        };
        
        var cb = fn.createDelegate(scope, ['b', 'c'], true /* appendArgs: true appends these to passed params */),
            rt = cb('a'); // a b c
        Y.Assert.areEqual('x', rt, 'Test return value');
        
        
        var cbTwo = fn.createDelegate(scope, ['a', 'b'], 0);
        rt = cbTwo('c'); // a b c
        Y.Assert.areEqual('x', rt, 'Test return value');
        
        
        var cbThree = fn.createDelegate(scope, ['b'], 1 /* this replaces at pos 1 */);
        rt = cbThree('a', 'c'); // a b c
        Y.Assert.areEqual('x', rt, 'Test return value');
        
        var cbFour = fn.createDelegate(scope, ['a', 'b', 'c']);
        rt = cbFour('x', 'y'); // overridden with a b c
        Y.Assert.areEqual('x', rt, 'Test return value');
    },
    
    // 19
    test_createInterceptor: function(){
        var scope = {
            foo: 'bar',
            n: 0
        };
        
        var fn = function(a, b){
            Y.Assert.areEqual(scope, this, 'Test if "this" is correct');
            Y.Assert.areEqual('bar', this.foo, 'Test if property matches');
            Y.Assert.areEqual('a', a, 'Test passed param');
            Y.Assert.areEqual('b', b, 'Test passed param');
            this.n++;
            return 'x';
        };
        
        // normal
        var rt = fn.call(scope, 'a', 'b'); // n 1
        Y.Assert.areEqual('x', rt, 'Test the return value');
        
        var cb = fn.createDelegate(scope).createInterceptor(function(a, b, z){
            Y.Assert.areEqual(scope, this, 'Test if "this" is correct');
            Y.Assert.areEqual('bar', this.foo, 'Test if property matches');
            Y.Assert.areEqual('a', a, 'Test passed param');
            Y.Assert.areEqual('b', b, 'Test passed param');
            return z === undefined;
        }, scope);
        // intercepted, but allowed to continue
        rt = cb('a', 'b'); // n 2
        Y.Assert.areEqual('x', rt, 'Test the return value');
        
        // intercepted, and cancelled
        cb('a', 'b', 'z');
        Y.Assert.areEqual(2, scope.n, 'Test the interceptor call count');
    },
    
    // 16
    test_createSequence: function(){
        var scope = {
            foo: 'bar',
            seq: 0
        };
        
        var fn = function(a, b){
            Y.Assert.areEqual(scope, this, 'Test if "this" is correct');
            Y.Assert.areEqual('bar', this.foo, 'Test if property matches');
            Y.Assert.areEqual('a', a, 'Test passed param');
            Y.Assert.areEqual('b', b, 'Test passed param');
            this.seq++;
            return 'x';
        };
        
        var rt = fn.call(scope, 'a', 'b'); // seq 1
        Y.Assert.areEqual('x', rt, 'Test the return value');
        Y.Assert.areEqual(1, scope.seq, 'Test the counter');
        
        var cb = fn.createDelegate(scope).createSequence(fn, scope);
        rt = cb('a', 'b'); // seq 2, 3
        Y.Assert.areEqual('x', rt, 'Test the return value');
        Y.Assert.areEqual(3, scope.seq, 'Test the number of times the sequence was called');
    },
    
    // 9
    test_defer: function(){
        var scope = {
            foo: 'bar',
            n: 0
        };
        
        var fn = function(a, b){
            Y.Assert.areEqual(scope, this, 'Test if "this" is correct');
            Y.Assert.areEqual('bar', this.foo, 'Test if property matches');
            Y.Assert.areEqual('a', a, 'Test passed param');
            Y.Assert.areEqual('b', b, 'Test passed param');
            this.n++;
        };
        
        fn.defer(1, scope, ['a', 'b']);
        fn.defer(2, scope, ['a', 'b']);
        
        setTimeout(function(){
            Y.Assert.areEqual(2, scope.n, 'Test if the counter matches the call timer count');
        }, 4);
    }
    
});
