Before this change, eqmx_mock_client uses a shared ets table
to store last received message, this causes troulbe when we
want to start / stop two or more clients in one test case
the ets table gets owned by the first spanwed client and
gets closed when the owner client dies.
Now it keeps the last received message in process state
and a gen_server call is added to retrieve it for verification
Along with this change in emqx_mock_client, it made possible
to write test case to verify the actual subscriber pid
used in shared subscription strategy, so test cases were
added (and modified) to verify different strategies
The hibernation behaviour is also changed (implicitly) in this commit:
Prior to this change, connection/session always hibernates after
the stats timer expires regardless of messages in mailbox.
After this commit, connection/session process only goes to hibernate
when the timer expires AND there is nothing left in the mailbox to
process
The implementation prior to this commit supports
only one gc enforcement policy which is message count threshold.
The new implementation introduces 1 more: volume threshold based
Prior to this change, listeners test suites did not start cowboy which
is responsible for websocket connections. and access suites start
duplicated processes and these actions are wrong
This change fix the problem states above.
Use `mnesia:foldl` to traverse mnesia rather than `mnesia:first` and
`mnesia:next`, as a badarg exception would occur if the record was
deleted while travering the whole table.
Prior to this change, the template file etc/emqx.conf is used
directly in testing, as a result, mustache style directories
are created e.g. `{{ platform_log_dir }}` which should have been
replaced with a config varialbe e.g. `log`
In this change, Makefile targets are added as `ct` dependency
to download bbmustach, load the template input, replace with
variableds defined in 'vars' file, finally to etc/gen.emqx.conf.
The direct usage of etc/emqx.conf in test code are replaced with
gen.emqx.conf
spring2maz