Sample of usage VisualFSM for KMM (Android + iOS) application - Kotlin Coroutines, Jetpack Compose, SwiftUI

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VisualFSM is a Kotlin library that implements an MVI architecture (Model-View-Intent)[1] and a set of tools for visualization and analysis of FSM's (Finite-state machine)[2] diagram of states.

The graph is being built from source code of FSM's implementation. There is no need of custom written configurations for FSM, you can just create new State and Action classes, they would be automatically added to the graph of States and Transitions.

Source code analysis and the graph built are being performed with reflection and declared as a separate module that would allow it to be connected to testing environment.

Authorization and registration process

Feature: AuthFeature.kt

States: AuthFSMState.kt

Actions: actions

AsyncWorker: AuthFSMAsyncWorker.kt

States to Ui data models mapper: ScreenDataMapper.kt

Generate digraph and tests sample: AuthFSMTests.kt

For CI visualization use graphviz, for the local visualization (on your PC) use webgraphviz.

Screenshots

Login	Registration	ConfirmationRequested
AsyncWorkState.Registering	Login with snackbar	UserAuthorized

What is MVI

MVI stands for Model-View-Intent. It is an architectural pattern that utilizes unidirectional data flow. The data circulates between Model and View only in one direction - from Model to View and from View to Model.

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What is FSM

A finite-state machine (FSM) is an abstract machine that can be in exactly one of a finite number of states at any given time. The FSM can change from one state to another in response to some inputs.

More on wikipedia