/
deferred.html
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deferred.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<link rel="stylesheet" href="test.css">
<title>Zepto Deferred unit tests</title>
<script src="../vendor/evidence.js"></script>
<script src="evidence_runner.js"></script>
<script>
// avoid caching
(function(){
function load(scripts){
scripts.split(' ').forEach(function(script){
document.write('<script src="../src/'+script+'.js?'+(+new Date)+'"></scr'+'ipt>')
})
}
load('zepto callbacks deferred')
})()
</script>
</head>
<body>
<h1>Zepto Deferred unit tests</h1>
<p id="results">
Running… see browser console for results
</p>
<script>
(function(){
var promiseFns = "resolve reject notify resolveWith rejectWith notifyWith done fail progress always".split(/\s+/),
deferredFns = "state always then promise done fail progress".split(/\s+/)
$.each(['', 'WithNew'], function(_, withNew) {
var createDeferred = function(fn) {
return withNew ? new $.Deferred(fn) : $.Deferred(fn)
}
Evidence('ZeptoDeferredTest' + withNew, {
testSuccessOnResolve: function(t) {
var called = 0
createDeferred().resolve().done(function() {
t.assertEqual(0, called++)
t.assertEqual("resolved", this.state(), "Deferred is resolved (state)")
}).fail(function() {
t.fail("Error on resolve")
}).always(function() {
t.assertEqual(1, called++)
})
t.assertEqual(2, called, "Success and Always handlers called")
},
testErrorOnReject: function(t) {
var called = 0
createDeferred().reject().done(function() {
t.fail("Success on reject")
}).fail(function() {
t.assertEqual(0, called++)
t.assertEqual( "rejected", this.state(), "Deferred is rejected (state)" )
}).always(function() {
t.assertEqual(1, called++)
})
t.assertEqual(2, called, "Error and Always handlers called")
},
testDeferredFnContextIsArg1: function(t) {
var called
createDeferred(function(defer) {
called = true
t.assertEqual(defer, this, "Defer passed as this & first argument")
})
t.assertTrue(called, "Deferred function was called")
},
testDoneWithResolvedValue: function(t) {
var called
createDeferred(function(defer) {
defer.resolve("done")
}).done(function(value) {
called = true
t.assertEqual("done", value, "Done() received resolved value")
})
t.assertTrue(called, "Deferred function was called")
},
testNoDoneOnReject: function(t) {
var called = false
createDeferred(function(defer) {
defer.reject("done")
}).done(function(value) {
called = true
t.fail("done() should not be called on error")
})
t.assertFalse(called, "Deferred function was called")
},
testIsChainable: function(t) {
var deferred = createDeferred(), each = $.each
// Ensure that each of the following methods are chainable
each(promiseFns, function(_, method) {
var object = {
m: deferred[method]
}
t.assertEqual(object, object.m(), method + " is chainable" )
})
},
testFilteringDone: function(t) {
var value1, value2, value3,
defer = createDeferred(),
piped = defer.then(function(a, b) {
return a * b
})
piped.done(function(result) { value3 = result })
defer.done(function(a, b) { value1 = a, value2 = b }).resolve(2, 3)
t.assertEqual(2, value1, "first resolve value ok")
t.assertEqual(3, value2, "second resolve value ok")
t.assertEqual(6, value3, "result of filter ok")
createDeferred().reject().then(function() { t.fail("then should not be called on reject") })
createDeferred().resolve().then($.noop).done(function(value) {
t.assertEqual(undefined, value, "then done callback can return undefined/null")
})
},
testSamePromise: function(t) {
createDeferred(function(defer) {
var promise = defer.promise()
t.assertEqual(promise, defer.promise(), "promise is always the same")
})
},
testExtendNonObject: function(t) {
createDeferred(function(defer) {
var func = function() {},
funcPromise = defer.promise(func)
t.assertEqual(func, funcPromise, "non objects get extended")
})
},
testPromiseOnlyFns: function(t) {
createDeferred(function(defer) {
var promise = defer.promise()
$.each(promise, function(key) {
var type = typeof promise[key]
t.assertEqual("function", type, key + " is a function (" + type + ")")
t.assertTrue(deferredFns.indexOf(key) > -1, key + "() is a promise function")
})
})
},
testExtendObjectWithPromiseFns: function(t) {
createDeferred(function(defer) {
var promise = defer.promise(),
func = function() {},
funcPromise = defer.promise(func),
fns = 0
$.each(promise, function(key) {
++fns
t.assertEqual(promise[key], func[key], key + " is the same")
})
t.assertEqual(deferredFns.length, fns, "should have all of the Deferred functions")
})
},
testFilteringReject: function(t) {
var value1, value2, value3,
defer = createDeferred(),
piped = defer.then(null, function(a, b) {
return a * b
})
piped.fail(function(result) { value3 = result })
defer.fail(function( a, b ) { value1 = a, value2 = b })
defer.reject( 2, 3 )
t.assertEqual(2, value1, "first reject value ok")
t.assertEqual(3, value2, "second reject value ok")
t.assertEqual(6, value3, "result of filter ok")
createDeferred().resolve().then(null, function() {
t.fail("then should not be called on resolve")
})
createDeferred().reject().then(null, $.noop).fail(function(value) {
t.assertEqual(undefined, value, "then fail callback can return undefined/null")
})
},
testFilteringProgress: function(t) {
var value1, value2, value3,
defer = createDeferred(),
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 )
t.assertEqual(2, value1, "first progress value ok")
t.assertEqual(3, value2, "second progress value ok")
t.assertEqual(6, value3, "result of filter ok")
},
testThenDeferredDone: function(t) {
var value1, value2, value3,
defer = createDeferred(),
piped = defer.then(function(a, b) {
return createDeferred(function(defer) {
defer.reject(a * b)
})
})
piped.fail(function(result) { value3 = result })
defer.done(function(a, b) { value1 = a, value2 = b })
defer.resolve(2, 3)
t.assertEqual(2, value1, "first resolve value ok")
t.assertEqual(3, value2, "second resolve value ok")
t.assertEqual(6, value3, "result of filter ok")
},
testThenDeferredFail: function(t) {
var value1, value2, value3,
defer = createDeferred(),
piped = defer.then(null, function(a, b) {
return createDeferred(function(defer) {
defer.resolve(a * b)
})
})
piped.done(function(result) { value3 = result })
defer.fail(function(a, b) { value1 = a, value2 = b })
defer.reject(2, 3)
t.assertEqual(2, value1, "first reject value ok")
t.assertEqual(3, value2, "second reject value ok")
t.assertEqual(6, value3, "result of filter ok")
},
testThenDeferredProgress: function(t) {
var value1, value2, value3,
defer = createDeferred(),
piped = defer.then(null, null, function(a, b) {
return createDeferred(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)
t.assertEqual(2, value1, "first progress value ok")
t.assertEqual(3, value2, "second progress value ok")
t.assertEqual(6, value3, "result of filter ok")
},
testThenWithContext: function(t) {
var defer, piped, defer2, piped2, context = {}
createDeferred().resolveWith(context, [2]).then(function(value) {
return value * 3
}).done(function(value) {
t.assertEqual(context, this, "custom context correctly propagated")
t.assertEqual(6, value, "proper value received")
})
createDeferred().resolve().then(function() {
return createDeferred().resolveWith(context)
}).done(function() {
t.assertEqual(context, this, "custom context of returned deferred correctly propagated")
})
defer = createDeferred()
piped = defer.then(function(value) {
return value * 3
})
defer.resolve( 2 )
piped.done(function(value) {
t.assertEqual(piped, this, "default context gets updated to latest promise in the chain")
t.assertEqual(6, value, "proper value received")
})
defer2 = createDeferred()
piped2 = defer2.then()
defer2.resolve(2)
piped2.done(function(value) {
t.assertEqual(piped2, this, "default context gets updated to latest promise in the chain (without passing function)")
t.assertEqual(2, value, "proper value received (without passing function)")
})
},
testWhenValueCreatesPromise: function(t) {
$.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": {},
"an array": [ 1, 2, 3 ]
}, function(message, value) {
t.assertTrue(
$.isFunction($.when(value).done(function(resolveValue) {
t.assertEqual(window, this, "Context is the global object with " + message)
t.assertEqual(value, resolveValue, "Test the promise was resolved with " + message)
}).promise), "Test " + message + " triggers the creation of a new Promise")
})
},
testWhenNoValueCreatesPromise: function(t) {
t.assertTrue(
$.isFunction($.when().done(function(resolveValue) {
t.assertEqual(window, this, "Context is the global object")
t.assertEqual(undefined, resolveValue, "Test the promise was resolved with no parameter")
}).promise), "Test calling when with no parameter triggers the creation of a new Promise")
},
testWhenPropagatesContext: function(t) {
var context = {}, called = false
$.when(createDeferred().resolveWith(context)).done(function() {
called = true
t.assertEqual(context, this, "when( promise ) propagates context")
})
t.assertTrue(called, "called done() after resolveWith")
},
testWhenDoneOnlyPromise: function(t) {
var cache
$.each([1,2,3], function(_, i) {
$.when(cache || createDeferred(function() {
this.resolve(i)
})).done(function(value) {
t.assertEqual(1, value, "Function executed" + (i > 1 ? " only once" : ""))
cache = value
})
})
},
testWhenJoined: function(t) {
var deferreds = {
value: 1,
success: createDeferred().resolve(1),
error: createDeferred().reject(0),
futureSuccess: createDeferred().notify(true),
futureError: createDeferred().notify(true),
notify: createDeferred().notify(true)
},
willSucceed = {
value: true,
success: true,
futureSuccess: true
},
willError = {
error: true,
futureError: true
},
willNotify = {
futureSuccess: true,
futureError: true,
notify: true
}
$.each(deferreds, function(id1, defer1) {
$.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 && $.isFunction(defer1.promise) ? defer1.promise() : undefined,
context2 = defer2 && $.isFunction(defer2.promise) ? defer2.promise() : undefined
$.when(defer1, defer2).done(function(a, b) {
if (shouldResolve) {
t.assertEqual(expected[0], a, code + " => resolve" )
t.assertEqual(expected[1], b, code + " => resolve" )
t.assertIdentical(context1, this[0], code + " => first context OK")
t.assertIdentical(context2, this[1], code + " => second context OK")
} else {
t.fail(code + " => resolve")
}
}).fail(function(a, b) {
if (shouldError) {
t.assertIdentical(expected[0], a, code + " => reject")
t.assertIdentical(expected[1], b, code + " => reject")
} else {
t.fail(code + " => reject")
}
}).progress(function(a, b) {
t.assertIdentical( expectedNotify[0], a, code + " => progress")
t.assertIdentical( expectedNotify[1], b, code + " => progress")
t.assertIdentical(expectedNotify[0] ? context1 : undefined, this[0], code + " => first context OK")
t.assertIdentical(expectedNotify[1] ? context2 : undefined, this[1], code + " => second context OK")
})
})
})
deferreds.futureSuccess.resolve(1)
deferreds.futureError.reject(0)
}
})
})
})()
</script>
</body>
</html>