diff options
Diffstat (limited to 'toolkit/modules/tests/xpcshell/test_Promise.js')
| -rw-r--r-- | toolkit/modules/tests/xpcshell/test_Promise.js | 1105 |
1 files changed, 0 insertions, 1105 deletions
diff --git a/toolkit/modules/tests/xpcshell/test_Promise.js b/toolkit/modules/tests/xpcshell/test_Promise.js deleted file mode 100644 index 6c7220692..000000000 --- a/toolkit/modules/tests/xpcshell/test_Promise.js +++ /dev/null @@ -1,1105 +0,0 @@ -/* Any copyright is dedicated to the Public Domain. - * http://creativecommons.org/publicdomain/zero/1.0/ */ -"use strict"; - -Components.utils.import("resource://gre/modules/Promise.jsm"); -Components.utils.import("resource://gre/modules/Services.jsm"); -Components.utils.import("resource://gre/modules/Task.jsm"); -Components.utils.import("resource://testing-common/PromiseTestUtils.jsm"); - -// Prevent test failures due to the unhandled rejections in this test file. -PromiseTestUtils.disableUncaughtRejectionObserverForSelfTest(); - -// Test runner - -var run_promise_tests = function run_promise_tests(tests, cb) { - let loop = function loop(index) { - if (index >= tests.length) { - if (cb) { - cb.call(); - } - return; - } - do_print("Launching test " + (index + 1) + "/" + tests.length); - let test = tests[index]; - // Execute from an empty stack - let next = function next() { - do_print("Test " + (index + 1) + "/" + tests.length + " complete"); - do_execute_soon(function() { - loop(index + 1); - }); - }; - let result = test(); - result.then(next, next); - }; - return loop(0); -}; - -var make_promise_test = function(test) { - return function runtest() { - do_print("Test starting: " + test.name); - try { - let result = test(); - if (result && "promise" in result) { - result = result.promise; - } - if (!result || !("then" in result)) { - let exn; - try { - do_throw("Test " + test.name + " did not return a promise: " + result); - } catch (x) { - exn = x; - } - return Promise.reject(exn); - } - // The test returns a promise - result = result.then( - // Test complete - function onResolve() { - do_print("Test complete: " + test.name); - }, - // The test failed with an unexpected error - function onReject(err) { - let detail; - if (err && typeof err == "object" && "stack" in err) { - detail = err.stack; - } else { - detail = "(no stack)"; - } - do_throw("Test " + test.name + " rejected with the following reason: " - + err + detail); - }); - return result; - } catch (x) { - // The test failed because of an error outside of a promise - do_throw("Error in body of test " + test.name + ": " + x + " at " + x.stack); - return Promise.reject(); - } - }; -}; - -// Tests - -var tests = []; - -// Utility function to observe an failures in a promise -// This function is useful if the promise itself is -// not returned. -var observe_failures = function observe_failures(promise) { - promise.catch(function onReject(reason) { - test.do_throw("Observed failure in test " + test + ": " + reason); - }); -}; - -// Test that all observers are notified -tests.push(make_promise_test( - function notification(test) { - // The size of the test - const SIZE = 10; - const RESULT = "this is an arbitrary value"; - - // Number of observers that yet need to be notified - let expected = SIZE; - - // |true| once an observer has been notified - let notified = []; - - // The promise observed - let source = Promise.defer(); - let result = Promise.defer(); - - let install_observer = function install_observer(i) { - observe_failures(source.promise.then( - function onSuccess(value) { - do_check_true(!notified[i], "Ensuring that observer is notified at most once"); - notified[i] = true; - - do_check_eq(value, RESULT, "Ensuring that the observed value is correct"); - if (--expected == 0) { - result.resolve(); - } - })); - }; - - // Install a number of observers before resolving - let i; - for (i = 0; i < SIZE/2; ++i) { - install_observer(i); - } - - source.resolve(RESULT); - - // Install remaining observers - for (;i < SIZE; ++i) { - install_observer(i); - } - - return result; - })); - -// Test that observers get the correct "this" value in strict mode. -tests.push( - make_promise_test(function handlers_this_value(test) { - return Promise.resolve().then( - function onResolve() { - // Since this file is in strict mode, the correct value is "undefined". - do_check_eq(this, undefined); - throw "reject"; - } - ).then( - null, - function onReject() { - // Since this file is in strict mode, the correct value is "undefined". - do_check_eq(this, undefined); - } - ); - })); - -// Test that observers registered on a pending promise are notified in order. -tests.push( - make_promise_test(function then_returns_before_callbacks(test) { - let deferred = Promise.defer(); - let promise = deferred.promise; - - let order = 0; - - promise.then( - function onResolve() { - do_check_eq(order, 0); - order++; - } - ); - - promise.then( - function onResolve() { - do_check_eq(order, 1); - order++; - } - ); - - let newPromise = promise.then( - function onResolve() { - do_check_eq(order, 2); - } - ); - - deferred.resolve(); - - // This test finishes after the last handler succeeds. - return newPromise; - })); - -// Test that observers registered on a resolved promise are notified in order. -tests.push( - make_promise_test(function then_returns_before_callbacks(test) { - let promise = Promise.resolve(); - - let order = 0; - - promise.then( - function onResolve() { - do_check_eq(order, 0); - order++; - } - ); - - promise.then( - function onResolve() { - do_check_eq(order, 1); - order++; - } - ); - - // This test finishes after the last handler succeeds. - return promise.then( - function onResolve() { - do_check_eq(order, 2); - } - ); - })); - -// Test that all observers are notified at most once, even if source -// is resolved/rejected several times -tests.push(make_promise_test( - function notification_once(test) { - // The size of the test - const SIZE = 10; - const RESULT = "this is an arbitrary value"; - - // Number of observers that yet need to be notified - let expected = SIZE; - - // |true| once an observer has been notified - let notified = []; - - // The promise observed - let observed = Promise.defer(); - let result = Promise.defer(); - - let install_observer = function install_observer(i) { - observe_failures(observed.promise.then( - function onSuccess(value) { - do_check_true(!notified[i], "Ensuring that observer is notified at most once"); - notified[i] = true; - - do_check_eq(value, RESULT, "Ensuring that the observed value is correct"); - if (--expected == 0) { - result.resolve(); - } - })); - }; - - // Install a number of observers before resolving - let i; - for (i = 0; i < SIZE/2; ++i) { - install_observer(i); - } - - observed.resolve(RESULT); - - // Install remaining observers - for (;i < SIZE; ++i) { - install_observer(i); - } - - // Resolve some more - for (i = 0; i < 10; ++i) { - observed.resolve(RESULT); - observed.reject(); - } - - return result; - })); - -// Test that throwing an exception from a onResolve listener -// does not prevent other observers from receiving the notification -// of success. -tests.push( - make_promise_test(function exceptions_do_not_stop_notifications(test) { - let source = Promise.defer(); - - let exception_thrown = false; - let exception_content = new Error("Boom!"); - - let observer_1 = source.promise.then( - function onResolve() { - exception_thrown = true; - throw exception_content; - }); - - let observer_2 = source.promise.then( - function onResolve() { - do_check_true(exception_thrown, "Second observer called after first observer has thrown"); - } - ); - - let result = observer_1.then( - function onResolve() { - do_throw("observer_1 should not have resolved"); - }, - function onReject(reason) { - do_check_true(reason == exception_content, "Obtained correct rejection"); - } - ); - - source.resolve(); - return result; - } -)); - -// Test that, once a promise is resolved, further resolve/reject -// are ignored. -tests.push( - make_promise_test(function subsequent_resolves_are_ignored(test) { - let deferred = Promise.defer(); - deferred.resolve(1); - deferred.resolve(2); - deferred.reject(3); - - let result = deferred.promise.then( - function onResolve(value) { - do_check_eq(value, 1, "Resolution chose the first value"); - }, - function onReject(reason) { - do_throw("Obtained a rejection while the promise was already resolved"); - } - ); - - return result; - })); - -// Test that, once a promise is rejected, further resolve/reject -// are ignored. -tests.push( - make_promise_test(function subsequent_rejects_are_ignored(test) { - let deferred = Promise.defer(); - deferred.reject(1); - deferred.reject(2); - deferred.resolve(3); - - let result = deferred.promise.then( - function onResolve() { - do_throw("Obtained a resolution while the promise was already rejected"); - }, - function onReject(reason) { - do_check_eq(reason, 1, "Rejection chose the first value"); - } - ); - - return result; - })); - -// Test that returning normally from a rejection recovers from the error -// and that listeners are informed of a success. -tests.push( - make_promise_test(function recovery(test) { - let boom = new Error("Boom!"); - let deferred = Promise.defer(); - const RESULT = "An arbitrary value"; - - let promise = deferred.promise.then( - function onResolve() { - do_throw("A rejected promise should not resolve"); - }, - function onReject(reason) { - do_check_true(reason == boom, "Promise was rejected with the correct error"); - return RESULT; - } - ); - - promise = promise.then( - function onResolve(value) { - do_check_eq(value, RESULT, "Promise was recovered with the correct value"); - } - ); - - deferred.reject(boom); - return promise; - })); - -// Test that returning a resolved promise from a onReject causes a resolution -// (recovering from the error) and that returning a rejected promise -// from a onResolve listener causes a rejection (raising an error). -tests.push( - make_promise_test(function recovery_with_promise(test) { - let boom = new Error("Arbitrary error"); - let deferred = Promise.defer(); - const RESULT = "An arbitrary value"; - const boom2 = new Error("Another arbitrary error"); - - // return a resolved promise from a onReject listener - let promise = deferred.promise.then( - function onResolve() { - do_throw("A rejected promise should not resolve"); - }, - function onReject(reason) { - do_check_true(reason == boom, "Promise was rejected with the correct error"); - return Promise.resolve(RESULT); - } - ); - - // return a rejected promise from a onResolve listener - promise = promise.then( - function onResolve(value) { - do_check_eq(value, RESULT, "Promise was recovered with the correct value"); - return Promise.reject(boom2); - } - ); - - promise = promise.catch( - function onReject(reason) { - do_check_eq(reason, boom2, "Rejection was propagated with the correct " + - "reason, through a promise"); - } - ); - - deferred.reject(boom); - return promise; - })); - -// Test that we can resolve with promises of promises -tests.push( - make_promise_test(function test_propagation(test) { - const RESULT = "Yet another arbitrary value"; - let d1 = Promise.defer(); - let d2 = Promise.defer(); - let d3 = Promise.defer(); - - d3.resolve(d2.promise); - d2.resolve(d1.promise); - d1.resolve(RESULT); - - return d3.promise.then( - function onSuccess(value) { - do_check_eq(value, RESULT, "Resolution with a promise eventually yielded " - + " the correct result"); - } - ); - })); - -// Test sequences of |then| and |catch| -tests.push( - make_promise_test(function test_chaining(test) { - let error_1 = new Error("Error 1"); - let error_2 = new Error("Error 2"); - let result_1 = "First result"; - let result_2 = "Second result"; - let result_3 = "Third result"; - - let source = Promise.defer(); - - let promise = source.promise.then().then(); - - source.resolve(result_1); - - // Check that result_1 is correctly propagated - promise = promise.then( - function onSuccess(result) { - do_check_eq(result, result_1, "Result was propagated correctly through " + - " several applications of |then|"); - return result_2; - } - ); - - // Check that returning from the promise produces a resolution - promise = promise.catch( - function onReject() { - do_throw("Incorrect rejection"); - } - ); - - // ... and that the check did not alter the value - promise = promise.then( - function onResolve(value) { - do_check_eq(value, result_2, "Result was propagated correctly once again"); - } - ); - - // Now the same kind of tests for rejections - promise = promise.then( - function onResolve() { - throw error_1; - } - ); - - promise = promise.then( - function onResolve() { - do_throw("Incorrect resolution: the exception should have caused a rejection"); - } - ); - - promise = promise.catch( - function onReject(reason) { - do_check_true(reason == error_1, "Reason was propagated correctly"); - throw error_2; - } - ); - - promise = promise.catch( - function onReject(reason) { - do_check_true(reason == error_2, "Throwing an error altered the reason " + - "as expected"); - return result_3; - } - ); - - promise = promise.then( - function onResolve(result) { - do_check_eq(result, result_3, "Error was correctly recovered"); - } - ); - - return promise; - })); - -// Test that resolving with a rejected promise actually rejects -tests.push( - make_promise_test(function resolve_to_rejected(test) { - let source = Promise.defer(); - let error = new Error("Boom"); - - let promise = source.promise.then( - function onResolve() { - do_throw("Incorrect call to onResolve listener"); - }, - function onReject(reason) { - do_check_eq(reason, error, "Rejection lead to the expected reason"); - } - ); - - source.resolve(Promise.reject(error)); - - return promise; - })); - -// Test that Promise.resolve resolves as expected -tests.push( - make_promise_test(function test_resolve(test) { - const RESULT = "arbitrary value"; - let p1 = Promise.resolve(RESULT); - let p2 = Promise.resolve(p1); - do_check_eq(p1, p2, "Promise.resolve used on a promise just returns the promise"); - - return p1.then( - function onResolve(result) { - do_check_eq(result, RESULT, "Promise.resolve propagated the correct result"); - } - ); - })); - -// Test that Promise.resolve throws when its argument is an async function. -tests.push( - make_promise_test(function test_promise_resolve_throws_with_async_function(test) { - Assert.throws(() => Promise.resolve(Task.async(function* () {})), - /Cannot resolve a promise with an async function/); - return Promise.resolve(); - })); - -// Test that the code after "then" is always executed before the callbacks -tests.push( - make_promise_test(function then_returns_before_callbacks(test) { - let promise = Promise.resolve(); - - let thenExecuted = false; - - promise = promise.then( - function onResolve() { - thenExecuted = true; - } - ); - - do_check_false(thenExecuted); - - return promise; - })); - -// Test that chaining promises does not generate long stack traces -tests.push( - make_promise_test(function chaining_short_stack(test) { - let source = Promise.defer(); - let promise = source.promise; - - const NUM_ITERATIONS = 100; - - for (let i = 0; i < NUM_ITERATIONS; i++) { - promise = promise.then( - function onResolve(result) { - return result + "."; - } - ); - } - - promise = promise.then( - function onResolve(result) { - // Check that the execution went as expected. - let expectedString = new Array(1 + NUM_ITERATIONS).join("."); - do_check_true(result == expectedString); - - // Check that we didn't generate one or more stack frames per iteration. - let stackFrameCount = 0; - let stackFrame = Components.stack; - while (stackFrame) { - stackFrameCount++; - stackFrame = stackFrame.caller; - } - - do_check_true(stackFrameCount < NUM_ITERATIONS); - } - ); - - source.resolve(""); - - return promise; - })); - -// Test that the values of the promise return by Promise.all() are kept in the -// given order even if the given promises are resolved in arbitrary order -tests.push( - make_promise_test(function all_resolve(test) { - let d1 = Promise.defer(); - let d2 = Promise.defer(); - let d3 = Promise.defer(); - - d3.resolve(4); - d2.resolve(2); - do_execute_soon(() => d1.resolve(1)); - - let promises = [d1.promise, d2.promise, 3, d3.promise]; - - return Promise.all(promises).then( - function onResolve([val1, val2, val3, val4]) { - do_check_eq(val1, 1); - do_check_eq(val2, 2); - do_check_eq(val3, 3); - do_check_eq(val4, 4); - } - ); - })); - -// Test that rejecting one of the promises passed to Promise.all() -// rejects the promise return by Promise.all() -tests.push( - make_promise_test(function all_reject(test) { - let error = new Error("Boom"); - - let d1 = Promise.defer(); - let d2 = Promise.defer(); - let d3 = Promise.defer(); - - d3.resolve(3); - d2.resolve(2); - do_execute_soon(() => d1.reject(error)); - - let promises = [d1.promise, d2.promise, d3.promise]; - - return Promise.all(promises).then( - function onResolve() { - do_throw("Incorrect call to onResolve listener"); - }, - function onReject(reason) { - do_check_eq(reason, error, "Rejection lead to the expected reason"); - } - ); - })); - -// Test that passing only values (not promises) to Promise.all() -// forwards them all as resolution values. -tests.push( - make_promise_test(function all_resolve_no_promises(test) { - try { - Promise.all(null); - do_check_true(false, "all() should only accept iterables"); - } catch (e) { - do_check_true(true, "all() fails when first the arg is not an iterable"); - } - - let p1 = Promise.all([]).then( - function onResolve(val) { - do_check_true(Array.isArray(val) && val.length == 0); - } - ); - - let p2 = Promise.all([1, 2, 3]).then( - function onResolve([val1, val2, val3]) { - do_check_eq(val1, 1); - do_check_eq(val2, 2); - do_check_eq(val3, 3); - } - ); - - return Promise.all([p1, p2]); - })); - -// Test that Promise.all() handles non-array iterables -tests.push( - make_promise_test(function all_iterable(test) { - function* iterable() { - yield 1; - yield 2; - yield 3; - } - - return Promise.all(iterable()).then( - function onResolve([val1, val2, val3]) { - do_check_eq(val1, 1); - do_check_eq(val2, 2); - do_check_eq(val3, 3); - }, - function onReject() { - do_throw("all() unexpectedly rejected"); - } - ); - })); - -// Test that throwing from the iterable passed to Promise.all() rejects the -// promise returned by Promise.all() -tests.push( - make_promise_test(function all_iterable_throws(test) { - function* iterable() { - throw 1; - } - - return Promise.all(iterable()).then( - function onResolve() { - do_throw("all() unexpectedly resolved"); - }, - function onReject(reason) { - do_check_eq(reason, 1, "all() rejects when the iterator throws"); - } - ); - })); - -// Test that Promise.race() resolves with the first available resolution value -tests.push( - make_promise_test(function race_resolve(test) { - let p1 = Promise.resolve(1); - let p2 = Promise.resolve().then(() => 2); - - return Promise.race([p1, p2]).then( - function onResolve(value) { - do_check_eq(value, 1); - } - ); - })); - -// Test that passing only values (not promises) to Promise.race() works -tests.push( - make_promise_test(function race_resolve_no_promises(test) { - try { - Promise.race(null); - do_check_true(false, "race() should only accept iterables"); - } catch (e) { - do_check_true(true, "race() fails when first the arg is not an iterable"); - } - - return Promise.race([1, 2, 3]).then( - function onResolve(value) { - do_check_eq(value, 1); - } - ); - })); - -// Test that Promise.race() never resolves when passed an empty iterable -tests.push( - make_promise_test(function race_resolve_never(test) { - return new Promise(resolve => { - Promise.race([]).then( - function onResolve() { - do_throw("race() unexpectedly resolved"); - }, - function onReject() { - do_throw("race() unexpectedly rejected"); - } - ); - - // Approximate "never" so we don't have to solve the halting problem. - do_timeout(200, resolve); - }); - })); - -// Test that Promise.race() handles non-array iterables. -tests.push( - make_promise_test(function race_iterable(test) { - function* iterable() { - yield 1; - yield 2; - yield 3; - } - - return Promise.race(iterable()).then( - function onResolve(value) { - do_check_eq(value, 1); - }, - function onReject() { - do_throw("race() unexpectedly rejected"); - } - ); - })); - -// Test that throwing from the iterable passed to Promise.race() rejects the -// promise returned by Promise.race() -tests.push( - make_promise_test(function race_iterable_throws(test) { - function* iterable() { - throw 1; - } - - return Promise.race(iterable()).then( - function onResolve() { - do_throw("race() unexpectedly resolved"); - }, - function onReject(reason) { - do_check_eq(reason, 1, "race() rejects when the iterator throws"); - } - ); - })); - -// Test that rejecting one of the promises passed to Promise.race() rejects the -// promise returned by Promise.race() -tests.push( - make_promise_test(function race_reject(test) { - let p1 = Promise.reject(1); - let p2 = Promise.resolve(2); - let p3 = Promise.resolve(3); - - return Promise.race([p1, p2, p3]).then( - function onResolve() { - do_throw("race() unexpectedly resolved"); - }, - function onReject(reason) { - do_check_eq(reason, 1, "race() rejects when given a rejected promise"); - } - ); - })); - -// Test behavior of the Promise constructor. -tests.push( - make_promise_test(function test_constructor(test) { - try { - new Promise(null); - do_check_true(false, "Constructor should fail when not passed a function"); - } catch (e) { - do_check_true(true, "Constructor fails when not passed a function"); - } - - let executorRan = false; - let promise = new Promise( - function executor(resolve, reject) { - executorRan = true; - do_check_eq(this, undefined); - do_check_eq(typeof resolve, "function", - "resolve function should be passed to the executor"); - do_check_eq(typeof reject, "function", - "reject function should be passed to the executor"); - } - ); - do_check_instanceof(promise, Promise); - do_check_true(executorRan, "Executor should execute synchronously"); - - // resolve a promise from the executor - let resolvePromise = new Promise( - function executor(resolve) { - resolve(1); - } - ).then( - function onResolve(value) { - do_check_eq(value, 1, "Executor resolved with correct value"); - }, - function onReject() { - do_throw("Executor unexpectedly rejected"); - } - ); - - // reject a promise from the executor - let rejectPromise = new Promise( - function executor(_, reject) { - reject(1); - } - ).then( - function onResolve() { - do_throw("Executor unexpectedly resolved"); - }, - function onReject(reason) { - do_check_eq(reason, 1, "Executor rejected with correct value"); - } - ); - - // throw from the executor, causing a rejection - let throwPromise = new Promise( - function executor() { - throw 1; - } - ).then( - function onResolve() { - do_throw("Throwing inside an executor should not resolve the promise"); - }, - function onReject(reason) { - do_check_eq(reason, 1, "Executor rejected with correct value"); - } - ); - - return Promise.all([resolvePromise, rejectPromise, throwPromise]); - })); - -// Test deadlock in Promise.jsm with nested event loops -// The scenario being tested is: -// promise_1.then({ -// do some work that will asynchronously signal done -// start an event loop waiting for the done signal -// } -// where the async work uses resolution of a second promise to -// trigger the "done" signal. While this would likely work in a -// naive implementation, our constant-stack implementation needs -// a special case to avoid deadlock. Note that this test is -// sensitive to the implementation-dependent order in which then() -// clauses for two different promises are executed, so it is -// possible for other implementations to pass this test and still -// have similar deadlocks. -tests.push( - make_promise_test(function promise_nested_eventloop_deadlock(test) { - // Set up a (long enough to be noticeable) timeout to - // exit the nested event loop and throw if the test run is hung - let shouldExitNestedEventLoop = false; - - function event_loop() { - let thr = Services.tm.mainThread; - while (!shouldExitNestedEventLoop) { - thr.processNextEvent(true); - } - } - - // I wish there was a way to cancel xpcshell do_timeout()s - do_timeout(2000, () => { - if (!shouldExitNestedEventLoop) { - shouldExitNestedEventLoop = true; - do_throw("Test timed out"); - } - }); - - let promise1 = Promise.resolve(1); - let promise2 = Promise.resolve(2); - - do_print("Setting wait for first promise"); - promise1.then(value => { - do_print("Starting event loop"); - event_loop(); - }, null); - - do_print("Setting wait for second promise"); - return promise2.catch(error => { return 3; }) - .then( - count => { - shouldExitNestedEventLoop = true; - }); - })); - -function wait_for_uncaught(aMustAppear, aTimeout = undefined) { - let remaining = new Set(); - for (let k of aMustAppear) { - remaining.add(k); - } - let deferred = Promise.defer(); - let print = do_print; - let execute_soon = do_execute_soon; - let observer = function({message, stack}) { - let data = message + stack; - print("Observing " + message + ", looking for " + aMustAppear.join(", ")); - for (let expected of remaining) { - if (data.indexOf(expected) != -1) { - print("I found " + expected); - remaining.delete(expected); - } - if (remaining.size == 0 && observer) { - Promise.Debugging.removeUncaughtErrorObserver(observer); - observer = null; - deferred.resolve(); - } - } - }; - Promise.Debugging.addUncaughtErrorObserver(observer); - if (aTimeout) { - do_timeout(aTimeout, function timeout() { - if (observer) { - Promise.Debugging.removeUncaughtErrorObserver(observer); - observer = null; - } - deferred.reject(new Error("Timeout")); - }); - } - return deferred.promise; -} - -// Test that uncaught errors are reported as uncaught -(function() { - let make_string_rejection = function make_string_rejection() { - let salt = (Math.random() * ( Math.pow(2, 24) - 1 )); - let string = "This is an uncaught rejection " + salt; - // Our error is not Error-like nor an nsIException, so the stack will - // include the closure doing the actual rejection. - return {mustFind: ["test_rejection_closure", string], error: string}; - }; - let make_num_rejection = function make_num_rejection() { - let salt = (Math.random() * ( Math.pow(2, 24) - 1 )); - // Our error is not Error-like nor an nsIException, so the stack will - // include the closure doing the actual rejection. - return {mustFind: ["test_rejection_closure", salt], error: salt}; - }; - let make_undefined_rejection = function make_undefined_rejection() { - // Our error is not Error-like nor an nsIException, so the stack will - // include the closure doing the actual rejection. - return {mustFind: ["test_rejection_closure"], error: undefined}; - }; - let make_error_rejection = function make_error_rejection() { - let salt = (Math.random() * ( Math.pow(2, 24) - 1 )); - let error = new Error("This is an uncaught error " + salt); - return { - mustFind: [error.message, error.fileName, error.lineNumber, error.stack], - error: error - }; - }; - let make_exception_rejection = function make_exception_rejection() { - let salt = (Math.random() * ( Math.pow(2, 24) - 1 )); - let exn = new Components.Exception("This is an uncaught exception " + salt, - Components.results.NS_ERROR_NOT_AVAILABLE); - return { - mustFind: [exn.message, exn.filename, exn.lineNumber, exn.location.toString()], - error: exn - }; - }; - for (let make_rejection of [make_string_rejection, - make_num_rejection, - make_undefined_rejection, - make_error_rejection, - make_exception_rejection]) { - let {mustFind, error} = make_rejection(); - let name = make_rejection.name; - tests.push(make_promise_test(function test_uncaught_is_reported() { - do_print("Testing with rejection " + name); - let promise = wait_for_uncaught(mustFind); - (function test_rejection_closure() { - // For the moment, we cannot be absolutely certain that a value is - // garbage-collected, even if it is not referenced anymore, due to - // the conservative stack-scanning algorithm. - // - // To be _almost_ certain that a value will be garbage-collected, we - // 1. isolate that value in an anonymous closure; - // 2. allocate 100 values instead of 1 (gc-ing a single value from - // these is sufficient for the test); - // 3. place everything in a loop, as the JIT typically reuses memory; - // 4. call all the GC methods we can. - // - // Unfortunately, we might still have intermittent failures, - // materialized as timeouts. - // - for (let i = 0; i < 100; ++i) { - Promise.reject(error); - } - })(); - do_print("Posted all rejections"); - Components.utils.forceGC(); - Components.utils.forceCC(); - Components.utils.forceShrinkingGC(); - return promise; - })); - } -})(); - - -// Test that caught errors are not reported as uncaught -tests.push( -make_promise_test(function test_caught_is_not_reported() { - let salt = (Math.random() * ( Math.pow(2, 24) - 1 )); - let promise = wait_for_uncaught([salt], 500); - (function() { - let uncaught = Promise.reject("This error, on the other hand, is caught " + salt); - uncaught.catch(function() { /* ignore rejection */ }); - uncaught = null; - })(); - // Isolate this in a function to increase likelihood that the gc will - // realise that |uncaught| has remained uncaught. - Components.utils.forceGC(); - - return promise.then(function onSuccess() { - throw new Error("This error was caught and should not have been reported"); - }, function onError() { - do_print("The caught error was not reported, all is fine"); - } - ); -})); - -// Bug 1033406 - Make sure Promise works even after freezing. -tests.push( - make_promise_test(function test_freezing_promise(test) { - var p = new Promise(function executor(resolve) { - do_execute_soon(resolve); - }); - Object.freeze(p); - return p; - }) -); - -function run_test() -{ - do_test_pending(); - run_promise_tests(tests, do_test_finished); -} |