function expectStreamToEmit(count, expectation) {
if (typeof count === "function") {
expectation = count;
count = 1;
}
var lastfm = new LastFmNode(),
connection = new fakes.Client(80, lastfm.host),
request = new fakes.LastFmRequest(),
gently = new Gently();
gently.expect(lastfm, "request", function() {
return request;
});
var trackStream = new RecentTracksStream(lastfm, "username");
trackStream.start();
trackStream.stop();
for(var index = 0; index < previousEmits.length; index++) {
request.emit("success", previousEmits[index]);
}
gently.expect(trackStream, "emit", count, expectation);
for(var times = 0; times < requestEmits[2]; times++) {
request.emit(requestEmits[0], requestEmits[1]);
}
}
it("starts and stops streaming when requested", function() {
gently.expect(lastfm, "request", 1, function(method, params) {
return request;
});
var trackStream = new RecentTracksStream(lastfm);
trackStream.start();
trackStream.stop();
assert.ok(!trackStream.isStreaming());
});
it("queries API every 10 seconds", function() {
var trackStream = new RecentTracksStream(lastfm, "username");
var timestamps = [];
gently.expect(lastfm, "request", 2, function(method, params) {
timestamps.push((new Date).getTime());
if (timestamps.length === 2) {
trackStream.stop();
var delay = timestamps[1] - timestamps[0];
assert.ok(delay >= (10000 - 50) && delay <= (10000 + 50));
}
return request;
});
trackStream.start();
});
it("queries API every 10 seconds", function() {
var trackStream = new RecentTracksStream(lastfm, "username");
var count = 0;
RecentTracksStream.prototype.scheduleCallback = function(callback, delay) {
count++;
if (count === 10) {
trackStream.stop();
}
assert.ok(delay, 10000);
gently.expect(lastfm, "request", function(method, params) {
return new fakes.LastFmRequest();
});
callback();
};
gently.expect(lastfm, "request", function(method, params) {
return new fakes.LastFmRequest();
});
trackStream.start();
});