January 2019
Intermediate to advanced
376 pages
8h 49m
English
Content preview from Property-Based Testing with PropEr, Erlang, and Elixir
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How Stateful Properties Run
PropEr divides the execution of a stateful test in two phases, one abstract and one real. The abstract phase is used to create a test scenario, and is executed without any code from your actual system running. Its whole objective is to take the model and command generation callbacks, and call these to build out the sequence of calls that will later be applied to the system.
Put visually, it looks like this:
Note the lack of postcondition or calls to the actual system. In the abstract mode, a command generator creates a symbolic call with its arguments based on an initial model state. PropEr then applies the preconditions ...
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