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Merge branch 'open1515' into open115

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This commit is contained in:
Victor Woeltjen
2015-09-23 16:05:09 -07:00
parent f3aceb1644 f4e53a946d
commit 0260e6fff4
42 changed files with 2477 additions and 177 deletions
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28
platform/core/src/services/Throttle.js
View File

@ -36,11 +36,16 @@ define(
*
* Returns a function that, when invoked, will invoke `fn` after
* `delay` milliseconds, only if no other invocations are pending.
* The optional argument `apply` determines whether.
* The optional argument `apply` determines whether or not a
* digest cycle should be triggered.
*
* The returned function will itself return a `Promise` which will
* resolve to the returned value of `fn` whenever that is invoked.
*
* In cases where arguments are provided, only the most recent
* set of arguments will be passed on to the throttled function
* at the time it is executed.
*
* @returns {Function}
* @memberof platform/core
*/
@ -56,12 +61,14 @@ define(
* @memberof platform/core.Throttle#
*/
return function (fn, delay, apply) {
var activeTimeout;
var promise, // Promise for the result of throttled function
args = [];
// Clear active timeout, so that next invocation starts
// a new one.
function clearActiveTimeout() {
activeTimeout = undefined;
function invoke() {
// Clear the active timeout so a new one starts next time.
promise = undefined;
// Invoke the function with the latest supplied arguments.
return fn.apply(null, args);
}
// Defaults
@ -69,14 +76,13 @@ define(
apply = apply || false;
return function () {
// Store arguments from this invocation
args = Array.prototype.slice.apply(arguments, [0]);
// Start a timeout if needed
if (!activeTimeout) {
activeTimeout = $timeout(fn, delay, apply);
activeTimeout.then(clearActiveTimeout);
}
promise = promise || $timeout(invoke, delay, apply);
// Return whichever timeout is active (to get
// a promise for the results of fn)
return activeTimeout;
return promise;
};
};
}

9
platform/core/test/services/ThrottleSpec.js
View File

@ -45,7 +45,9 @@ define(
// Verify precondition: Not called at throttle-time
expect(mockTimeout).not.toHaveBeenCalled();
expect(throttled()).toEqual(mockPromise);
expect(mockTimeout).toHaveBeenCalledWith(mockFn, 0, false);
expect(mockFn).not.toHaveBeenCalled();
expect(mockTimeout)
.toHaveBeenCalledWith(jasmine.any(Function), 0, false);
});
it("schedules only one timeout at a time", function () {
@ -59,10 +61,11 @@ define(
it("schedules additional invocations after resolution", function () {
var throttled = throttle(mockFn);
throttled();
mockPromise.then.mostRecentCall.args[0](); // Resolve timeout
mockTimeout.mostRecentCall.args[0](); // Resolve timeout
throttled();
mockPromise.then.mostRecentCall.args[0]();
mockTimeout.mostRecentCall.args[0]();
throttled();
mockTimeout.mostRecentCall.args[0]();
expect(mockTimeout.calls.length).toEqual(3);
});
});