jquery/test/unit/deferred.js

441 lines
11 KiB
JavaScript
Raw Normal View History

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( 23 );
var defer = createDeferred();
strictEqual( defer.pipe, defer.then, "pipe is an alias of then" );
createDeferred().resolve().done(function() {
ok( true, "Success on resolve" );
strictEqual( this.state(), "resolved", "Deferred is resolved (state)" );
}).fail(function() {
ok( false, "Error on resolve" );
}).always(function() {
ok( true, "Always callback on resolve" );
});
createDeferred().reject().done(function() {
ok( false, "Success on reject" );
}).fail(function() {
ok( true, "Error on reject" );
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");
}).done(function( value ) {
strictEqual( value, "done", "Passed function executed" );
});
createDeferred(function( defer ) {
var promise = defer.promise(),
func = function() {},
funcPromise = defer.promise( func );
strictEqual( defer.promise(), promise, "promise is always the same" );
strictEqual( funcPromise, func, "non objects get extended" );
jQuery.each( promise, function( key, value ) {
if ( !jQuery.isFunction( promise[ key ] ) ) {
ok( false, key + " is a function (" + jQuery.type( promise[ key ] ) + ")" );
}
if ( promise[ key ] !== func[ key ] ) {
strictEqual( func[ key ], promise[ key ], key + " is the same" );
}
});
});
jQuery.expandedEach = jQuery.each;
jQuery.expandedEach( "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 defer = jQuery.Deferred();
expect( 10 );
jQuery.expandedEach = jQuery.each;
jQuery.expandedEach( "resolve reject notify resolveWith rejectWith notifyWith done fail progress always".split(" "), function( _, method ) {
var object = {
m: defer[ method ]
};
strictEqual( object.m(), object, method + " is chainable" );
});
});
test( "jQuery.Deferred.then - filtering (done)", function() {
expect( 4 );
var value1, value2, value3,
defer = jQuery.Deferred(),
piped = defer.then(function( a, b ) {
return a * b;
});
2011-04-08 15:35:08 +00:00
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" );
jQuery.Deferred().reject().then(function() {
ok( false, "then should not be called on reject" );
});
jQuery.Deferred().resolve().then( jQuery.noop ).done(function( value ) {
strictEqual( value, undefined, "then done callback can return undefined/null" );
});
});
test( "jQuery.Deferred.then - filtering (fail)", function() {
expect( 4 );
var value1, value2, value3,
defer = jQuery.Deferred(),
piped = defer.then( null, function( a, b ) {
return a * b;
});
2011-04-08 15:35:08 +00:00
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" );
jQuery.Deferred().resolve().then( null, function() {
ok( false, "then should not be called on resolve" );
});
jQuery.Deferred().reject().then( null, jQuery.noop ).fail(function( value ) {
strictEqual( value, undefined, "then fail callback can return undefined/null" );
});
});
test( "jQuery.Deferred.then - filtering (progress)", function() {
expect( 3 );
var value1, value2, value3,
defer = jQuery.Deferred(),
piped = defer.then( null, null, function( a, b ) {
return a * b;
});
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" );
});
test( "jQuery.Deferred.then - deferred (done)", function() {
expect( 3 );
var value1, value2, value3,
defer = jQuery.Deferred(),
piped = defer.then(function( a, b ) {
return jQuery.Deferred(function( defer ) {
defer.reject( a * b );
});
});
2011-04-08 15:35:08 +00:00
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" );
});
test( "jQuery.Deferred.then - deferred (fail)", function() {
expect( 3 );
var value1, value2, value3,
defer = jQuery.Deferred(),
piped = defer.then( null, function( a, b ) {
return jQuery.Deferred(function( defer ) {
defer.resolve( a * b );
});
});
2011-04-08 15:35:08 +00:00
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.then - deferred (progress)", function() {
expect( 3 );
var value1, value2, value3,
defer = jQuery.Deferred(),
piped = defer.then( null, null, function( a, b ) {
return jQuery.Deferred(function( defer ) {
defer.resolve( a * b );
});
});
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.then - context", function() {
expect( 7 );
var context = {};
jQuery.Deferred().resolveWith( context, [ 2 ] ).then(function( value ) {
return value * 3;
}).done(function( value ) {
strictEqual( this, context, "custom context correctly propagated" );
strictEqual( value, 6, "proper value received" );
});
jQuery.Deferred().resolve().then(function() {
return jQuery.Deferred().resolveWith(context);
}).done(function() {
strictEqual( this, context, "custom context of returned deferred correctly propagated" );
});
var defer = jQuery.Deferred(),
piped = defer.then(function( value ) {
return value * 3;
});
defer.resolve( 2 );
piped.done(function( value ) {
strictEqual( this, piped, "default context gets updated to latest promise in the chain" );
strictEqual( value, 6, "proper value received" );
});
var defer2 = jQuery.Deferred(),
piped2 = defer2.then();
defer2.resolve( 2 );
piped2.done(function( value ) {
strictEqual( this, piped2, "default context gets updated to latest promise in the chain (without passing function)" );
strictEqual( value, 2, "proper value received (without passing function)" );
});
});
test( "jQuery.when", function() {
expect( 34 );
// 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( this, window, "Context is the global object with " + message );
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( this, window, "Test the promise was resolved with window as its context" );
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 context = {};
jQuery.when( jQuery.Deferred().resolveWith( context ) ).done(function() {
strictEqual( this, context, "when( promise ) propagates context" );
});
2012-06-21 19:30:24 +00:00
var cache;
jQuery.each([ 1, 2, 3 ], function( k, i ) {
jQuery.when( cache || jQuery.Deferred(function() {
2012-06-21 19:30:24 +00:00
this.resolve( i );
})
).done(function( value ) {
strictEqual( value, 1, "Function executed" + ( i > 1 ? " only once" : "" ) );
cache = value;
});
2012-06-21 19:30:24 +00:00
});
});
test( "jQuery.when - joined", function() {
expect( 119 );
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,
context1 = defer1 && jQuery.isFunction( defer1.promise ) ? defer1.promise() : undefined,
context2 = defer2 && jQuery.isFunction( defer2.promise ) ? defer2.promise() : undefined;
jQuery.when( defer1, defer2 ).done(function( a, b ) {
if ( shouldResolve ) {
deepEqual( [ a, b ], expected, code + " => resolve" );
strictEqual( this[ 0 ], context1, code + " => first context OK" );
strictEqual( this[ 1 ], context2, code + " => second context OK" );
} else {
ok( false, code + " => resolve" );
}
}).fail(function( a, b ) {
if ( shouldError ) {
deepEqual( [ a, b ], expected, code + " => reject" );
} else {
ok( false, code + " => reject" );
}
}).progress(function( a, b ) {
deepEqual( [ a, b ], expectedNotify, code + " => progress" );
strictEqual( this[ 0 ], expectedNotify[ 0 ] ? context1 : undefined, code + " => first context OK" );
strictEqual( this[ 1 ], expectedNotify[ 1 ] ? context2 : undefined, code + " => second context OK" );
});
});
});
deferreds.futureSuccess.resolve( 1 );
deferreds.futureError.reject( 0 );
});