jquery/test/unit/deferred.js

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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" );
});
});
} );
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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" );
});
});
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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.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 );
});