Tags » Erlang


The next transition is a withdrawal. Naively, we add another command:

open(_Data) ->
        {open, {call, bank_statem, deposit, }},
        {open, {call, bank_statem, withdraw, }}
… 756 more words

State machine properties

One of the more interesting corners of the Erlang ecosystem is property based testing. Building on Haskell’s QuickCheck, it allows generation of test cases, similar to “fuzzing”. 403 more words


Hold pls

On hold

The next step for our bank account is to place a hold on an account.

Using state functions, this is as simple as: 295 more words


Handle event function

The main difference between gen_statem and the older gen_fsm, is the addition of a new “handle event function” callback mode, with less restrictions on the state data type. 167 more words


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