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In this test we no longer use the fake XMLHttpRequest object, because the
semantics of ajax.poll better describes the expected behavior. Asserting that
the method started polling in terms of fakeXMLHttpRequest would basically
mean duplicating ajax.poll 's test case.
The test fails because connect is not a method. We will add it along with the
call to ajax.poll in one go, as seen in Listing 13.56.
Listing 13.56 Connecting by calling ajax.poll
(function () {
/* ... */
function connect() {
ajax.cometClient = {
connect: connect,
dispatch: dispatch,
observe: observe
What happens if we call connect when the client is already connected? From
the looks of things, more polling. Listing 13.57 asserts that only one connection is
Listing 13.57 Verifying that ajax.poll is only called once
"test should not connect if connected": function () {
this.client.url = "/my/url";
ajax.poll = stubFn({});
ajax.poll = stubFn({});
To pass this test we need to keep a reference to the poller, and only connect if
this reference does not exist, as Listing 13.58 shows.
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