jquery/test/unit/deferred.js

module("deferred", { teardown: moduleTeardown });

jQuery.each( [ "", " - new operator" ], function( _, withNew ) {

	function createDeferred() {
		return withNew ? new jQuery._Deferred() : jQuery._Deferred();
	}

	test("jQuery._Deferred" + withNew, function() {

		expect( 11 );

		var deferred,
			object,
			test;

		deferred = createDeferred();

		test = false;

		deferred.done( function( value ) {
			equals( value , "value" , "Test pre-resolve callback" );
			test = true;
		} );

		deferred.resolve( "value" );

		ok( test , "Test pre-resolve callbacks called right away" );

		test = false;

		deferred.done( function( value ) {
			equals( value , "value" , "Test post-resolve callback" );
			test = true;
		} );

		ok( test , "Test post-resolve callbacks called right away" );

		deferred.cancel();

		test = true;

		deferred.done( function() {
			ok( false , "Cancel was ignored" );
			test = false;
		} );

		ok( test , "Test cancel" );

		deferred = createDeferred().resolve();

		try {
			deferred.done( function() {
				throw "Error";
			} , function() {
				ok( true , "Test deferred do not cancel on exception" );
			} );
		} catch( e ) {
			strictEqual( e , "Error" , "Test deferred propagates exceptions");
			deferred.done();
		}

		test = "";
		deferred = createDeferred().done( function() {

			test += "A";

		}, function() {

			test += "B";

		} ).resolve();

		strictEqual( test , "AB" , "Test multiple done parameters" );

		test = "";

		deferred.done( function() {

			deferred.done( function() {

				test += "C";

			} );

			test += "A";

		}, function() {

			test += "B";
		} );

		strictEqual( test , "ABC" , "Test done callbacks order" );

		deferred = createDeferred();

		deferred.resolveWith( jQuery , [ document ] ).done( function( doc ) {
			ok( this === jQuery && arguments.length === 1 && doc === document , "Test fire context & args" );
		});

		// #8421
		deferred = createDeferred();
		deferred.resolveWith().done(function() {
			ok( true, "Test resolveWith can be called with no argument" );
		});
	});
} );

jQuery.each( [ "", " - new operator" ], function( _, withNew ) {

	function createDeferred( fn ) {
		return withNew ? new jQuery.Deferred( fn ) : jQuery.Deferred( fn );
	}

	test("jQuery.Deferred" + withNew, function() {

		expect( 8 );

		createDeferred().resolve().then( function() {
			ok( true , "Success on resolve" );
			ok( this.isResolved(), "Deferred is resolved" );
		}, function() {
			ok( false , "Error on resolve" );
		}).always( function() {
			ok( true , "Always callback on resolve" );
		});

		createDeferred().reject().then( function() {
			ok( false , "Success on reject" );
		}, function() {
			ok( true , "Error on reject" );
			ok( this.isRejected(), "Deferred is rejected" );
		}).always( function() {
			ok( true , "Always callback on reject" );
		});

		createDeferred( function( defer ) {
			ok( this === defer , "Defer passed as this & first argument" );
			this.resolve( "done" );
		}).then( function( value ) {
			strictEqual( value , "done" , "Passed function executed" );
		});
	});
} );

test( "jQuery.Deferred.chain - filtering (done)", function() {

	expect(3);

	var defer = jQuery.Deferred(),
		chained = defer.chain(function( a, b ) {
			return a * b;
		}),
		value1,
		value2,
		value3;

	chained.done(function( result ) {
		value3 = result;
	});

	defer.done(function( a, b ) {
		value1 = a;
		value2 = b;
	});

	defer.resolve( 2, 3 );

	strictEqual( value1, 2, "first resolve value ok" );
	strictEqual( value2, 3, "second resolve value ok" );
	strictEqual( value3, 6, "result of filter ok" );

	jQuery.Deferred().reject().chain(function() {
		ok( false, "chain should not be called on reject" );
	});
});

test( "jQuery.Deferred.chain - filtering (fail)", function() {

	expect(3);

	var defer = jQuery.Deferred(),
		chained = defer.chain( null, function( a, b ) {
			return a * b;
		} ),
		value1,
		value2,
		value3;

	chained.fail(function( result ) {
		value3 = result;
	});

	defer.fail(function( a, b ) {
		value1 = a;
		value2 = b;
	});

	defer.reject( 2, 3 );

	strictEqual( value1, 2, "first reject value ok" );
	strictEqual( value2, 3, "second reject value ok" );
	strictEqual( value3, 6, "result of filter ok" );

	jQuery.Deferred().resolve().chain( null, function() {
		ok( false, "chain should not be called on resolve" );
	} );
});

test( "jQuery.Deferred.chain - deferred (done)", function() {

	expect(3);

	var defer = jQuery.Deferred(),
		chained = defer.chain(function( a, b ) {
			return jQuery.Deferred(function( defer ) {
				defer.reject( a * b );
			});
		}),
		value1,
		value2,
		value3;

	chained.fail(function( result ) {
		value3 = result;
	});

	defer.done(function( a, b ) {
		value1 = a;
		value2 = b;
	});

	defer.resolve( 2, 3 );

	strictEqual( value1, 2, "first resolve value ok" );
	strictEqual( value2, 3, "second resolve value ok" );
	strictEqual( value3, 6, "result of filter ok" );
});

test( "jQuery.Deferred.chain - deferred (fail)", function() {

	expect(3);

	var defer = jQuery.Deferred(),
		chained = defer.chain( null, function( a, b ) {
			return jQuery.Deferred(function( defer ) {
				defer.resolve( a * b );
			});
		} ),
		value1,
		value2,
		value3;

	chained.done(function( result ) {
		value3 = result;
	});

	defer.fail(function( a, b ) {
		value1 = a;
		value2 = b;
	});

	defer.reject( 2, 3 );

	strictEqual( value1, 2, "first reject value ok" );
	strictEqual( value2, 3, "second reject value ok" );
	strictEqual( value3, 6, "result of filter ok" );
});

test( "jQuery.when" , function() {

	expect( 23 );

	// Some other objects
	jQuery.each( {

		"an empty string": "",
		"a non-empty string": "some string",
		"zero": 0,
		"a number other than zero": 1,
		"true": true,
		"false": false,
		"null": null,
		"undefined": undefined,
		"a plain object": {}

	} , function( message , value ) {

		ok( jQuery.isFunction( jQuery.when( value ).done(function( resolveValue ) {
			strictEqual( resolveValue , value , "Test the promise was resolved with " + message );
		}).promise ) , "Test " + message + " triggers the creation of a new Promise" );

	} );

	ok( jQuery.isFunction( jQuery.when().done(function( resolveValue ) {
		strictEqual( resolveValue , undefined , "Test the promise was resolved with no parameter" );
	}).promise ) , "Test calling when with no parameter triggers the creation of a new Promise" );

	var cache, i;

	for( i = 1 ; i < 4 ; i++ ) {
		jQuery.when( cache || jQuery.Deferred( function() {
			this.resolve( i );
		}) ).done(function( value ) {
			strictEqual( value , 1 , "Function executed" + ( i > 1 ? " only once" : "" ) );
			cache = value;
		});
	}
});

test("jQuery.when - joined", function() {

	expect(25);

	var deferreds = {
			value: 1,
			success: jQuery.Deferred().resolve( 1 ),
			error: jQuery.Deferred().reject( 0 ),
			futureSuccess: jQuery.Deferred(),
			futureError: jQuery.Deferred()
		},
		willSucceed = {
			value: true,
			success: true,
			error: false,
			futureSuccess: true,
			futureError: false
		};

	jQuery.each( deferreds, function( id1, defer1 ) {
		jQuery.each( deferreds, function( id2, defer2 ) {
			var shouldResolve = willSucceed[ id1 ] && willSucceed[ id2 ],
				expected = shouldResolve ? [ 1, 1 ] : [ 0, undefined ],
				code = id1 + "/" + id2;
			jQuery.when( defer1, defer2 ).done(function( a, b ) {
				if ( shouldResolve ) {
					same( [ a, b ], expected, code + " => resolve" );
				}
			}).fail(function( a, b ) {
				if ( !shouldResolve ) {
					same( [ a, b ], expected, code + " => resolve" );
				}
			});
		} );
	} );
	deferreds.futureSuccess.resolve( 1 );
	deferreds.futureError.reject( 0 );
});