jquery/test/unit/deferred.js

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module("deferred", { teardown: moduleTeardown });
jQuery.each( [ "", " - new operator" ], function( _, withNew ) {
function createDeferred( fn ) {
return withNew ? new jQuery.Deferred( fn ) : jQuery.Deferred( fn );
}
test("jQuery.Deferred" + withNew, function() {
expect( 22 );
createDeferred().resolve().then( function() {
ok( true , "Success on resolve" );
ok( this.isResolved(), "Deferred is resolved" );
strictEqual( this.state(), "resolved", "Deferred is resolved (state)" );
}, 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" );
strictEqual( this.state(), "rejected", "Deferred is rejected (state)" );
}).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" );
});
jQuery.each( "resolve reject".split( " " ), function( _, change ) {
createDeferred( function( defer ) {
strictEqual( defer.state(), "pending", "pending after creation" );
var checked = 0;
defer.progress(function( value ) {
strictEqual( value, checked, "Progress: right value (" + value + ") received" );
});
for( checked = 0; checked < 3 ; checked++ ) {
defer.notify( checked );
}
strictEqual( defer.state(), "pending", "pending after notification" );
defer[ change ]();
notStrictEqual( defer.state(), "pending", "not pending after " + change );
defer.notify();
});
});
});
} );
test( "jQuery.Deferred - chainability", function() {
var methods = "resolve reject notify resolveWith rejectWith notifyWith done fail progress then always".split( " " ),
defer = jQuery.Deferred();
expect( methods.length );
jQuery.each( methods, function( _, method ) {
var object = { m: defer[ method ] };
strictEqual( object.m(), object, method + " is chainable" );
});
});
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test( "jQuery.Deferred.pipe - filtering (done)", function() {
expect(4);
var defer = jQuery.Deferred(),
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piped = defer.pipe(function( a, b ) {
return a * b;
}),
value1,
value2,
value3;
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piped.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" );
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jQuery.Deferred().reject().pipe(function() {
ok( false, "pipe should not be called on reject" );
});
jQuery.Deferred().resolve().pipe( jQuery.noop ).done(function( value ) {
strictEqual( value, undefined, "pipe done callback can return undefined/null" );
});
});
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test( "jQuery.Deferred.pipe - filtering (fail)", function() {
expect(4);
var defer = jQuery.Deferred(),
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piped = defer.pipe( null, function( a, b ) {
return a * b;
} ),
value1,
value2,
value3;
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piped.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" );
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jQuery.Deferred().resolve().pipe( null, function() {
ok( false, "pipe should not be called on resolve" );
} );
jQuery.Deferred().reject().pipe( null, jQuery.noop ).fail(function( value ) {
strictEqual( value, undefined, "pipe fail callback can return undefined/null" );
});
});
test( "jQuery.Deferred.pipe - filtering (progress)", function() {
expect(3);
var defer = jQuery.Deferred(),
piped = defer.pipe( null, null, function( a, b ) {
return a * b;
} ),
value1,
value2,
value3;
piped.progress(function( result ) {
value3 = result;
});
defer.progress(function( a, b ) {
value1 = a;
value2 = b;
});
defer.notify( 2, 3 );
strictEqual( value1, 2, "first progress value ok" );
strictEqual( value2, 3, "second progress value ok" );
strictEqual( value3, 6, "result of filter ok" );
});
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test( "jQuery.Deferred.pipe - deferred (done)", function() {
expect(3);
var defer = jQuery.Deferred(),
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piped = defer.pipe(function( a, b ) {
return jQuery.Deferred(function( defer ) {
defer.reject( a * b );
});
}),
value1,
value2,
value3;
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piped.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" );
});
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test( "jQuery.Deferred.pipe - deferred (fail)", function() {
expect(3);
var defer = jQuery.Deferred(),
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piped = defer.pipe( null, function( a, b ) {
return jQuery.Deferred(function( defer ) {
defer.resolve( a * b );
});
} ),
value1,
value2,
value3;
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piped.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.Deferred.pipe - deferred (progress)", function() {
expect(3);
var defer = jQuery.Deferred(),
piped = defer.pipe( null, null, function( a, b ) {
return jQuery.Deferred(function( defer ) {
defer.resolve( a * b );
});
} ),
value1,
value2,
value3;
piped.done(function( result ) {
value3 = result;
});
defer.progress(function( a, b ) {
value1 = a;
value2 = b;
});
defer.notify( 2, 3 );
strictEqual( value1, 2, "first progress value ok" );
strictEqual( value2, 3, "second progress value ok" );
strictEqual( value3, 6, "result of filter ok" );
});
test( "jQuery.Deferred.pipe - context", function() {
expect(4);
var context = {};
jQuery.Deferred().resolveWith( context, [ 2 ] ).pipe(function( value ) {
return value * 3;
}).done(function( value ) {
strictEqual( this, context, "custom context correctly propagated" );
strictEqual( value, 6, "proper value received" );
});
var defer = jQuery.Deferred(),
piped = defer.pipe(function( value ) {
return value * 3;
});
defer.resolve( 2 );
piped.done(function( value ) {
strictEqual( this.promise(), piped, "default context gets updated to latest defer in the chain" );
strictEqual( value, 6, "proper value received" );
});
});
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(53);
var deferreds = {
value: 1,
success: jQuery.Deferred().resolve( 1 ),
error: jQuery.Deferred().reject( 0 ),
futureSuccess: jQuery.Deferred().notify( true ),
futureError: jQuery.Deferred().notify( true ),
notify: jQuery.Deferred().notify( true )
},
willSucceed = {
value: true,
success: true,
futureSuccess: true
},
willError = {
error: true,
futureError: true
},
willNotify = {
futureSuccess: true,
futureError: true,
notify: true
};
jQuery.each( deferreds, function( id1, defer1 ) {
jQuery.each( deferreds, function( id2, defer2 ) {
var shouldResolve = willSucceed[ id1 ] && willSucceed[ id2 ],
shouldError = willError[ id1 ] || willError[ id2 ],
shouldNotify = willNotify[ id1 ] || willNotify[ id2 ],
expected = shouldResolve ? [ 1, 1 ] : [ 0, undefined ],
expectedNotify = shouldNotify && [ willNotify[ id1 ], willNotify[ id2 ] ],
code = id1 + "/" + id2;
var promise = jQuery.when( defer1, defer2 ).done(function( a, b ) {
if ( shouldResolve ) {
deepEqual( [ a, b ], expected, code + " => resolve" );
} else {
ok( false , code + " => resolve" );
}
}).fail(function( a, b ) {
if ( shouldError ) {
deepEqual( [ a, b ], expected, code + " => reject" );
} else {
ok( false , code + " => reject" );
}
}).progress(function progress( a, b ) {
deepEqual( [ a, b ], expectedNotify, code + " => progress" );
});
} );
} );
deferreds.futureSuccess.resolve( 1 );
deferreds.futureError.reject( 0 );
});