[aerogear-dev] Unified Push Server - GCM Push Notification Sender test

[Apostolos Emmanouilidis]

Hi all,

I've managed to write an integration test which verifies that the
correct GCM notifications are sent to the GCM server when using the
selective send method.

The approach is the following:

  - I have an Arquillian test which is executed inside the container.
The reason for executing the test inside the container is that I want to
access the application scoped GCMCache [1]
  - The PushApplication, Android Variant and Android installations
registrations are performed outside the container
  - When creating the WAR which is finally deployed from Arquillian, the
whole jar containing the GCM dependencies is removed and a custom GCM
Sender is added to the classpath
  - The custom GCM Sender is defined as ApplicationScoped and it
contains some static fields. These static fields are instantiated when
the send method is called. e.g there is a static list which is filled
with the android token ids
  -  There is a test which is executed inside the container, accesses
the CGMCache, retrieves the custom Sender from the cache and uses the
Awaitility framework [2] in order to wait until the notifications are
sent

The code looks like the following:

def "verify that Push were sent to the correct devices"() {
        expect:
        Awaitility.await().atMost(Duration.FIVE_SECONDS).until(
            new Callable<Boolean>() {
                public Boolean call() throws Exception {
                    return
cache.getSenderForAPIKey(ANDROID_VARIANT_GOOGLE_KEY).regIdsList != null
&&
cache.getSenderForAPIKey(ANDROID_VARIANT_GOOGLE_KEY).regIdsList.size()
== 2; // The condition that must be fulfilled
                }
            }
        );

cache.getSenderForAPIKey(ANDROID_VARIANT_GOOGLE_KEY).regIdsList.size()
== 2 &&
cache.getSenderForAPIKey(ANDROID_VARIANT_GOOGLE_KEY).regIdsList.contains(ANDROID_DEVICE_TOKEN_2) && Sender.regIdsList.contains(ANDROID_DEVICE_TOKEN)
    }

Even if this everything works perfectly using this approach, I'm not
sure if the specific test should be included in the upstream. Having 2
GCM Sender classes in the project might confuse the end users. Wdyt? If
anyone has to propose a more elegant way to verify that the correct
notifications are sent plz tell me. 

[1]:
https://github.com/aerogear/aerogear-unified-push-server/blob/master/src/main/java/org/jboss/aerogear/connectivity/message/cache/GCMCache.java
[2]: http://code.google.com/p/awaitility/
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