@reactivex/rxjs
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Reactive Extensions for modern JavaScript
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<div class="content" data-ice="content"><h1 data-ice="title">spec-js/util/Immediate-spec.js</h1>
<pre class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">"use strict";
var chai_1 = require('chai');
var sinon = require('sinon');
var Immediate_1 = require('../../dist/cjs/util/Immediate');
var Rx = require('../../dist/cjs/Rx');
/** @test {ImmediateDefinition} */
describe('ImmediateDefinition', function () {
var sandbox;
beforeEach(function () {
sandbox = sinon.sandbox.create();
});
afterEach(function () {
sandbox.restore();
});
it('should have setImmediate and clearImmediate methods', function () {
var result = new Immediate_1.ImmediateDefinition(__root__);
chai_1.expect(result.setImmediate).to.be.a('function');
chai_1.expect(result.clearImmediate).to.be.a('function');
});
describe('when setImmediate exists on root', function () {
it('should use the setImmediate and clearImmediate methods from root', function () {
var setImmediateCalled = false;
var clearImmediateCalled = false;
var root = {
setImmediate: function () {
setImmediateCalled = true;
},
clearImmediate: function () {
clearImmediateCalled = true;
}
};
var result = new Immediate_1.ImmediateDefinition(root);
result.setImmediate(function () {
//noop
});
result.clearImmediate(null);
chai_1.expect(setImmediateCalled).to.be.ok;
chai_1.expect(clearImmediateCalled).to.be.ok;
});
});
describe('prototype.createProcessNextTickSetImmediate()', function () {
it('should create the proper flavor of setImmediate using process.nextTick', function () {
var instance = {
root: {
process: {
nextTick: sinon.spy()
}
},
runIfPresent: function () {
//noop
},
partiallyApplied: sinon.spy(),
addFromSetImmediateArguments: sinon.stub().returns(123456)
};
var setImmediateImpl = Immediate_1.ImmediateDefinition.prototype.createProcessNextTickSetImmediate.call(instance);
chai_1.expect(setImmediateImpl).to.be.a('function');
var action = function () {
//noop
};
var handle = setImmediateImpl(action);
chai_1.expect(handle).to.equal(123456);
chai_1.expect(instance.addFromSetImmediateArguments).have.been.called;
chai_1.expect(instance.partiallyApplied).have.been.calledWith(instance.runIfPresent, handle);
});
});
describe('prototype.createPostMessageSetImmediate()', function () {
it('should create the proper flavor of setImmediate using postMessage', function () {
var addEventListenerCalledWith = null;
var instance = {
root: {
addEventListener: function (name, callback) {
addEventListenerCalledWith = [name, callback];
},
postMessage: sinon.spy(),
Math: {
random: sinon.stub().returns(42)
}
},
runIfPresent: sinon.spy(),
addFromSetImmediateArguments: sinon.stub().returns(123456)
};
var setImmediateImpl = Immediate_1.ImmediateDefinition.prototype.createPostMessageSetImmediate.call(instance);
chai_1.expect(setImmediateImpl).to.be.a('function');
chai_1.expect(addEventListenerCalledWith[0]).to.equal('message');
addEventListenerCalledWith[1]({ data: 'setImmediate$42$123456', source: instance.root });
chai_1.expect(instance.runIfPresent).have.been.calledWith(123456);
var action = function () {
//noop
};
var handle = setImmediateImpl(action);
chai_1.expect(handle).to.equal(123456);
chai_1.expect(instance.addFromSetImmediateArguments).have.been.called;
chai_1.expect(instance.root.postMessage).have.been.calledWith('setImmediate$42$123456', '*');
});
});
describe('prototype.createMessageChannelSetImmediate', function () {
it('should create the proper flavor of setImmediate that uses message channels', function () {
var port1 = {};
var port2 = {
postMessage: sinon.spy()
};
function MockMessageChannel() {
this.port1 = port1;
this.port2 = port2;
}
var instance = {
root: {
MessageChannel: MockMessageChannel
},
runIfPresent: sinon.spy(),
addFromSetImmediateArguments: sinon.stub().returns(123456)
};
var setImmediateImpl = Immediate_1.ImmediateDefinition.prototype.createMessageChannelSetImmediate.call(instance);
chai_1.expect(setImmediateImpl).to.be.a('function');
chai_1.expect(port1.onmessage).to.be.a('function');
port1.onmessage({ data: 'something' });
chai_1.expect(instance.runIfPresent).have.been.calledWith('something');
var action = function () {
//noop
};
var handle = setImmediateImpl(action);
chai_1.expect(handle).to.equal(123456);
chai_1.expect(port2.postMessage).have.been.calledWith(123456);
});
});
describe('prototype.createReadyStateChangeSetImmediate', function () {
it('should create the proper flavor of setImmediate that uses readystatechange on a DOM element', function () {
var fakeScriptElement = {};
var instance = {
root: {
document: {
createElement: sinon.stub().returns(fakeScriptElement),
documentElement: {
appendChild: sinon.spy(),
removeChild: sinon.spy(),
}
}
},
runIfPresent: sinon.spy(),
addFromSetImmediateArguments: sinon.stub().returns(123456)
};
var setImmediateImpl = Immediate_1.ImmediateDefinition.prototype.createReadyStateChangeSetImmediate.call(instance);
chai_1.expect(setImmediateImpl).to.be.a('function');
var action = function () {
//noop
};
var handle = setImmediateImpl(action);
chai_1.expect(handle).to.equal(123456);
chai_1.expect(instance.root.document.createElement).have.been.calledWith('script');
chai_1.expect(fakeScriptElement.onreadystatechange).to.be.a('function');
chai_1.expect(instance.root.document.documentElement.appendChild).have.been.calledWith(fakeScriptElement);
fakeScriptElement.onreadystatechange();
chai_1.expect(instance.runIfPresent).have.been.calledWith(handle);
chai_1.expect(fakeScriptElement.onreadystatechange).to.be.a('null');
chai_1.expect(instance.root.document.documentElement.removeChild).have.been.calledWith(fakeScriptElement);
});
});
describe('when setImmediate does *not* exist on root', function () {
describe('when it can use process.nextTick', function () {
it('should use the post message impl', function () {
var nextTickImpl = function () {
//noop
};
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseProcessNextTick').returns(true);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUsePostMessage').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseMessageChannel').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseReadyStateChange').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'createProcessNextTickSetImmediate').returns(nextTickImpl);
var result = new Immediate_1.ImmediateDefinition({});
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseProcessNextTick).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUsePostMessage).not.have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseMessageChannel).not.have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange).not.have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.createProcessNextTickSetImmediate).have.been.called;
chai_1.expect(result.setImmediate).to.equal(nextTickImpl);
});
});
describe('when it cannot use process.nextTick', function () {
it('should use the post message impl', function () {
var postMessageImpl = function () {
//noop
};
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseProcessNextTick').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUsePostMessage').returns(true);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseMessageChannel').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseReadyStateChange').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'createPostMessageSetImmediate').returns(postMessageImpl);
var result = new Immediate_1.ImmediateDefinition({});
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseProcessNextTick).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUsePostMessage).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseMessageChannel).not.have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange).not.have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.createPostMessageSetImmediate).have.been.called;
chai_1.expect(result.setImmediate).to.equal(postMessageImpl);
});
});
describe('when it cannot use process.nextTick or postMessage', function () {
it('should use the readystatechange impl', function () {
var messageChannelImpl = function () {
//noop
};
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseProcessNextTick').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUsePostMessage').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseMessageChannel').returns(true);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseReadyStateChange').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'createMessageChannelSetImmediate').returns(messageChannelImpl);
var result = new Immediate_1.ImmediateDefinition({});
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseProcessNextTick).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUsePostMessage).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseMessageChannel).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange).not.have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.createMessageChannelSetImmediate).have.been.called;
chai_1.expect(result.setImmediate).to.equal(messageChannelImpl);
});
});
describe('when it cannot use process.nextTick, postMessage or Message channels', function () {
it('should use the readystatechange impl', function () {
var readyStateChangeImpl = function () {
//noop
};
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseProcessNextTick').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUsePostMessage').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseMessageChannel').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseReadyStateChange').returns(true);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'createReadyStateChangeSetImmediate').returns(readyStateChangeImpl);
var result = new Immediate_1.ImmediateDefinition({});
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseProcessNextTick).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUsePostMessage).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseMessageChannel).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.createReadyStateChangeSetImmediate).have.been.called;
chai_1.expect(result.setImmediate).to.equal(readyStateChangeImpl);
});
});
describe('when no other methods to implement setImmediate are available', function () {
it('should use the setTimeout impl', function () {
var setTimeoutImpl = function () {
//noop
};
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseProcessNextTick').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUsePostMessage').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseMessageChannel').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseReadyStateChange').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'createSetTimeoutSetImmediate').returns(setTimeoutImpl);
var result = new Immediate_1.ImmediateDefinition({});
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseProcessNextTick).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUsePostMessage).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseMessageChannel).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange).have.been.called;
chai_1.expect(Immediate_1.ImmediateDefinition.prototype.createSetTimeoutSetImmediate).have.been.called;
chai_1.expect(result.setImmediate).to.equal(setTimeoutImpl);
});
});
});
describe('partiallyApplied', function () {
describe('when passed a function as the first argument', function () {
it('should return a function that takes no arguments and will be called with the passed arguments', function () {
var fn = sinon.spy();
var result = Immediate_1.ImmediateDefinition.prototype.partiallyApplied(fn, 'arg1', 'arg2', 'arg3');
chai_1.expect(result).to.be.a('function');
chai_1.expect(fn).not.have.been.called;
result();
chai_1.expect(fn).have.been.calledWith('arg1', 'arg2', 'arg3');
});
});
describe('when passed a non-function as an argument', function () {
it('should coerce to a string and convert to a function which will be called by the returned function', function () {
__root__.__wasCalled = null;
var fnStr = '__wasCalled = true;';
var result = Immediate_1.ImmediateDefinition.prototype.partiallyApplied(fnStr);
chai_1.expect(result).to.be.a('function');
result();
chai_1.expect(__root__.__wasCalled).to.be.true;
delete __root__.__wasCalled;
});
});
});
describe('prototype.identify', function () {
it('should use Object.toString to return an identifier string', function () {
function MockObject() {
//noop
}
sandbox.stub(MockObject.prototype, 'toString').returns('[object HEYO!]');
var instance = {
root: {
Object: MockObject
}
};
var result = Immediate_1.ImmediateDefinition.prototype.identify.call(instance);
chai_1.expect(result).to.equal('[object HEYO!]');
});
});
describe('prototype.canUseProcessNextTick', function () {
describe('when root.process does not identify as [object process]', function () {
it('should return false', function () {
var instance = {
root: {
process: {}
},
identify: sinon.stub().returns('[object it-is-not-a-tumor]')
};
var result = Immediate_1.ImmediateDefinition.prototype.canUseProcessNextTick.call(instance);
chai_1.expect(result).to.be.false;
chai_1.expect(instance.identify).have.been.calledWith(instance.root.process);
});
});
describe('when root.process identifies as [object process]', function () {
it('should return true', function () {
var instance = {
root: {
process: {}
},
identify: sinon.stub().returns('[object process]')
};
var result = Immediate_1.ImmediateDefinition.prototype.canUseProcessNextTick.call(instance);
chai_1.expect(result).to.be.true;
chai_1.expect(instance.identify).have.been.calledWith(instance.root.process);
});
});
});
describe('prototype.canUsePostMessage', function () {
describe('when there is a global postMessage function', function () {
describe('and importScripts does NOT exist', function () {
it('should maintain any existing onmessage handler', function () {
var originalOnMessage = function () {
//noop
};
var instance = {
root: {
onmessage: originalOnMessage
}
};
Immediate_1.ImmediateDefinition.prototype.canUsePostMessage.call(instance);
chai_1.expect(instance.root.onmessage).to.equal(originalOnMessage);
});
describe('and postMessage is synchronous', function () {
it('should return false', function () {
var postMessageCalled = false;
var instance = {
root: {
postMessage: function () {
postMessageCalled = true;
this.onmessage();
}
}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUsePostMessage.call(instance);
chai_1.expect(result).to.be.false;
chai_1.expect(postMessageCalled).to.be.true;
});
});
describe('and postMessage is asynchronous', function () {
it('should return true', function () {
var postMessageCalled = false;
var instance = {
root: {
postMessage: function () {
postMessageCalled = true;
var _onmessage = this.onmessage;
setTimeout(function () { _onmessage(); });
}
}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUsePostMessage.call(instance);
chai_1.expect(result).to.be.true;
chai_1.expect(postMessageCalled).to.be.true;
});
});
});
describe('and importScripts *does* exist because it is a worker', function () {
it('should return false', function () {
var instance = {
root: {
postMessage: function () {
//noop
},
importScripts: function () {
//noop
}
}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUsePostMessage.call(instance);
chai_1.expect(result).to.be.false;
});
});
});
describe('when there is NOT a global postMessage function', function () {
it('should return false', function () {
var instance = {
root: {}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUsePostMessage.call(instance);
chai_1.expect(result).to.be.false;
});
});
});
describe('prototype.canUseMessageChannel', function () {
it('should return true if MessageChannel exists', function () {
var instance = {
root: {
MessageChannel: function () {
//noop
}
}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUseMessageChannel.call(instance);
chai_1.expect(result).to.be.true;
});
it('should return false if MessageChannel does NOT exist', function () {
var instance = {
root: {}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUseMessageChannel.call(instance);
chai_1.expect(result).to.be.false;
});
});
describe('prototype.canUseReadyStateChange', function () {
describe('when there is a document in global scope', function () {
it('should return true if created script elements have an onreadystatechange property', function () {
var fakeScriptElement = {
onreadystatechange: null
};
var instance = {
root: {
document: {
createElement: sinon.stub().returns(fakeScriptElement)
}
}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange.call(instance);
chai_1.expect(result).to.be.true;
chai_1.expect(instance.root.document.createElement).have.been.calledWith('script');
});
it('should return false if created script elements do NOT have an onreadystatechange property', function () {
var fakeScriptElement = {};
var instance = {
root: {
document: {
createElement: sinon.stub().returns(fakeScriptElement)
}
}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange.call(instance);
chai_1.expect(result).to.be.false;
chai_1.expect(instance.root.document.createElement).have.been.calledWith('script');
});
});
it('should return false if there is no document in global scope', function () {
var instance = {
root: {}
};
var result = Immediate_1.ImmediateDefinition.prototype.canUseReadyStateChange.call(instance);
chai_1.expect(result).to.be.false;
});
});
describe('prototype.addFromSetImmediateArguments', function () {
it('should add to tasksByHandle and increment the nextHandle', function () {
var partiallyAppliedResult = {};
var instance = {
tasksByHandle: {},
nextHandle: 42,
partiallyApplied: sinon.stub().returns(partiallyAppliedResult)
};
var args = [function () {
//noop
}, 'foo', 'bar'];
var handle = Immediate_1.ImmediateDefinition.prototype.addFromSetImmediateArguments.call(instance, args);
chai_1.expect(handle).to.equal(42);
chai_1.expect(instance.nextHandle).to.equal(43);
chai_1.expect(instance.tasksByHandle[42]).to.equal(partiallyAppliedResult);
});
});
describe('clearImmediate', function () {
it('should delete values from tasksByHandle', function () {
var setTimeoutImpl = function () {
//noop
};
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseProcessNextTick').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUsePostMessage').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseMessageChannel').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'canUseReadyStateChange').returns(false);
sandbox.stub(Immediate_1.ImmediateDefinition.prototype, 'createSetTimeoutSetImmediate').returns(setTimeoutImpl);
var Immediate = new Immediate_1.ImmediateDefinition({});
Immediate.tasksByHandle[123456] = function () {
//noop
};
chai_1.expect('123456' in Immediate.tasksByHandle).to.be.true;
Immediate.clearImmediate(123456);
chai_1.expect('123456' in Immediate.tasksByHandle).to.be.false;
});
});
describe('prototype.runIfPresent', function () {
it('should delay running the task if it is currently running a task', function () {
var mockApplied = function () {
//noop
};
var instance = {
root: {
setTimeout: sinon.spy(),
Object: Object
},
currentlyRunningATask: true,
partiallyApplied: sinon.stub().returns(mockApplied)
};
Immediate_1.ImmediateDefinition.prototype.runIfPresent.call(instance, 123456);
chai_1.expect(instance.partiallyApplied).have.been.calledWith(instance.runIfPresent, 123456);
chai_1.expect(instance.root.setTimeout).have.been.calledWith(mockApplied, 0);
});
it('should not error if there is no task currently running and the handle passed is not found', function () {
chai_1.expect(function () {
var instance = {
root: {
setTimeout: sinon.spy(),
Object: Object
},
currentlyRunningATask: false,
tasksByHandle: {}
};
Immediate_1.ImmediateDefinition.prototype.runIfPresent.call(instance, 888888);
}).not.to.throw();
});
describe('when a task is found for the handle', function () {
it('should execute the task and clean up after', function () {
var instance = {
root: {
setTimeout: sinon.spy(),
Object: Object
},
currentlyRunningATask: false,
tasksByHandle: {},
clearImmediate: sinon.spy()
};
var spy = sinon.stub();
spy({
task: function () {
chai_1.expect(instance.currentlyRunningATask).to.be.true;
}
});
instance.tasksByHandle[123456] = spy;
Immediate_1.ImmediateDefinition.prototype.runIfPresent.call(instance, 123456);
chai_1.expect(instance.clearImmediate).have.been.calledWith(123456);
});
});
});
describe('prototype.createSetTimeoutSetImmediate', function () {
it('should create a proper setImmediate implementation that uses setTimeout', function () {
var mockApplied = function () {
//noop
};
var instance = {
root: {
setTimeout: sinon.spy()
},
addFromSetImmediateArguments: sinon.stub().returns(123456),
runIfPresent: function () {
//noop
},
partiallyApplied: sinon.stub().returns(mockApplied)
};
var setImmediateImpl = Immediate_1.ImmediateDefinition.prototype.createSetTimeoutSetImmediate.call(instance);
var handle = setImmediateImpl();
chai_1.expect(handle).to.equal(123456);
chai_1.expect(instance.addFromSetImmediateArguments).have.been.called;
chai_1.expect(instance.root.setTimeout).have.been.calledWith(mockApplied, 0);
});
});
describe('integration test', function () {
it('should work', function (done) {
var results = [];
Rx.Observable.from([1, 2, 3], Rx.Scheduler.asap)
.subscribe(function (x) {
results.push(x);
}, function () {
done(new Error('should not be called'));
}, function () {
chai_1.expect(results).to.deep.equal([1, 2, 3]);
done();
});
});
});
});
//# sourceMappingURL=Immediate-spec.js.map</code></pre>
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