gecko-dev/addon-sdk/source/test/test-event-core.js

245 строки
7.7 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
'use strict';
const { on, once, off, emit, count, amass } = require('sdk/event/core');
const { LoaderWithHookedConsole } = require("sdk/test/loader");
exports['test add a listener'] = function(assert) {
let events = [ { name: 'event#1' }, 'event#2' ];
let target = { name: 'target' };
on(target, 'message', function(message) {
assert.equal(this, target, 'this is a target object');
assert.equal(message, events.shift(), 'message is emitted event');
});
emit(target, 'message', events[0]);
emit(target, 'message', events[0]);
};
exports['test that listener is unique per type'] = function(assert) {
let actual = []
let target = {}
function listener() { actual.push(1) }
on(target, 'message', listener);
on(target, 'message', listener);
on(target, 'message', listener);
on(target, 'foo', listener);
on(target, 'foo', listener);
emit(target, 'message');
assert.deepEqual([ 1 ], actual, 'only one message listener added');
emit(target, 'foo');
assert.deepEqual([ 1, 1 ], actual, 'same listener added for other event');
};
exports['test event type matters'] = function(assert) {
let target = { name: 'target' }
on(target, 'message', function() {
assert.fail('no event is expected');
});
on(target, 'done', function() {
assert.pass('event is emitted');
});
emit(target, 'foo')
emit(target, 'done');
};
exports['test all arguments are pasesd'] = function(assert) {
let foo = { name: 'foo' }, bar = 'bar';
let target = { name: 'target' };
on(target, 'message', function(a, b) {
assert.equal(a, foo, 'first argument passed');
assert.equal(b, bar, 'second argument passed');
});
emit(target, 'message', foo, bar);
};
exports['test no side-effects in emit'] = function(assert) {
let target = { name: 'target' };
on(target, 'message', function() {
assert.pass('first listener is called');
on(target, 'message', function() {
assert.fail('second listener is called');
});
});
emit(target, 'message');
};
exports['test can remove next listener'] = function(assert) {
let target = { name: 'target' };
function fail() assert.fail('Listener should be removed');
on(target, 'data', function() {
assert.pass('first litener called');
off(target, 'data', fail);
});
on(target, 'data', fail);
emit(target, 'data', 'hello');
};
exports['test order of propagation'] = function(assert) {
let actual = [];
let target = { name: 'target' };
on(target, 'message', function() { actual.push(1); });
on(target, 'message', function() { actual.push(2); });
on(target, 'message', function() { actual.push(3); });
emit(target, 'message');
assert.deepEqual([ 1, 2, 3 ], actual, 'called in order they were added');
};
exports['test remove a listener'] = function(assert) {
let target = { name: 'target' };
let actual = [];
on(target, 'message', function listener() {
actual.push(1);
on(target, 'message', function() {
off(target, 'message', listener);
actual.push(2);
})
});
emit(target, 'message');
assert.deepEqual([ 1 ], actual, 'first listener called');
emit(target, 'message');
assert.deepEqual([ 1, 1, 2 ], actual, 'second listener called');
emit(target, 'message');
assert.deepEqual([ 1, 1, 2, 2, 2 ], actual, 'first listener removed');
};
exports['test remove all listeners for type'] = function(assert) {
let actual = [];
let target = { name: 'target' }
on(target, 'message', function() { actual.push(1); });
on(target, 'message', function() { actual.push(2); });
on(target, 'message', function() { actual.push(3); });
on(target, 'bar', function() { actual.push('b') });
off(target, 'message');
emit(target, 'message');
emit(target, 'bar');
assert.deepEqual([ 'b' ], actual, 'all message listeners were removed');
};
exports['test remove all listeners'] = function(assert) {
let actual = [];
let target = { name: 'target' }
on(target, 'message', function() { actual.push(1); });
on(target, 'message', function() { actual.push(2); });
on(target, 'message', function() { actual.push(3); });
on(target, 'bar', function() { actual.push('b') });
off(target);
emit(target, 'message');
emit(target, 'bar');
assert.deepEqual([], actual, 'all listeners events were removed');
};
exports['test falsy arguments are fine'] = function(assert) {
let type, listener, actual = [];
let target = { name: 'target' }
on(target, 'bar', function() { actual.push(0) });
off(target, 'bar', listener);
emit(target, 'bar');
assert.deepEqual([ 0 ], actual, '3rd bad ard will keep listeners');
off(target, type);
emit(target, 'bar');
assert.deepEqual([ 0, 0 ], actual, '2nd bad arg will keep listener');
off(target, type, listener);
emit(target, 'bar');
assert.deepEqual([ 0, 0, 0 ], actual, '2nd&3rd bad args will keep listener');
};
exports['test error handling'] = function(assert) {
let target = Object.create(null);
let error = Error('boom!');
on(target, 'message', function() { throw error; })
on(target, 'error', function(boom) {
assert.equal(boom, error, 'thrown exception causes error event');
});
emit(target, 'message');
};
exports['test unhandled exceptions'] = function(assert) {
let exceptions = [];
let { loader, messages } = LoaderWithHookedConsole(module);
let { emit, on } = loader.require('sdk/event/core');
let target = {};
let boom = Error('Boom!');
let drax = Error('Draax!!');
on(target, 'message', function() { throw boom; });
emit(target, 'message');
assert.equal(messages.length, 1, 'Got the first exception');
assert.equal(messages[0].type, 'exception', 'The console message is exception');
assert.ok(~String(messages[0].msg).indexOf('Boom!'),
'unhandled exception is logged');
on(target, 'error', function() { throw drax; });
emit(target, 'message');
assert.equal(messages.length, 2, 'Got the second exception');
assert.equal(messages[1].type, 'exception', 'The console message is exception');
assert.ok(~String(messages[1].msg).indexOf('Draax!'),
'error in error handler is logged');
};
exports['test unhandled errors'] = function(assert) {
let exceptions = [];
let { loader, messages } = LoaderWithHookedConsole(module);
let { emit, on } = loader.require('sdk/event/core');
let target = {};
let boom = Error('Boom!');
emit(target, 'error', boom);
assert.equal(messages.length, 1, 'Error was logged');
assert.equal(messages[0].type, 'exception', 'The console message is exception');
assert.ok(~String(messages[0].msg).indexOf('Boom!'),
'unhandled exception is logged');
};
exports['test count'] = function(assert) {
let target = {};
assert.equal(count(target, 'foo'), 0, 'no listeners for "foo" events');
on(target, 'foo', function() {});
assert.equal(count(target, 'foo'), 1, 'listener registered');
on(target, 'foo', function() {}, 2, 'another listener registered');
off(target)
assert.equal(count(target, 'foo'), 0, 'listeners unregistered');
};
exports['test emit.lazy'] = function(assert) {
let target = {}, boom = Error('boom!'), errors = [], actual = []
on(target, 'error', function error(e) errors.push(e))
on(target, 'a', function() 1);
on(target, 'a', function() {});
on(target, 'a', function() 2);
on(target, 'a', function() { throw boom });
on(target, 'a', function() 3);
for each (let value in emit.lazy(target, 'a'))
actual.push(value);
assert.deepEqual(actual, [ 1, undefined, 2, 3 ],
'all results were collected');
assert.deepEqual(errors, [ boom ], 'errors reporetd');
};
require('test').run(exports);