fxa_client/state_machine/internal_machines/
authenticating.rs

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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use super::{invalid_transition, Event, InternalStateMachine, State};
use crate::{Error, FxaEvent, FxaState, Result};

pub struct AuthenticatingStateMachine;

// Save some typing
use Event::*;
use State::*;

impl InternalStateMachine for AuthenticatingStateMachine {
    fn initial_state(&self, event: FxaEvent) -> Result<State> {
        match event {
            FxaEvent::CompleteOAuthFlow { code, state } => Ok(CompleteOAuthFlow {
                code: code.clone(),
                state: state.clone(),
            }),
            FxaEvent::CancelOAuthFlow => Ok(Complete(FxaState::Disconnected)),
            e => Err(Error::InvalidStateTransition(format!(
                "Authenticating -> {e}"
            ))),
        }
    }

    fn next_state(&self, state: State, event: Event) -> Result<State> {
        Ok(match (state, event) {
            (CompleteOAuthFlow { .. }, CompleteOAuthFlowSuccess) => InitializeDevice,
            (CompleteOAuthFlow { .. }, CallError) => Complete(FxaState::Disconnected),
            (InitializeDevice, InitializeDeviceSuccess) => Complete(FxaState::Connected),
            (InitializeDevice, CallError) => Complete(FxaState::Disconnected),
            (state, event) => return invalid_transition(state, event),
        })
    }
}

#[cfg(test)]
mod test {
    use super::super::StateMachineTester;
    use super::*;

    #[test]
    fn test_complete_oauth_flow() {
        let mut tester = StateMachineTester::new(
            AuthenticatingStateMachine,
            FxaEvent::CompleteOAuthFlow {
                code: "test-code".to_owned(),
                state: "test-state".to_owned(),
            },
        );
        assert_eq!(
            tester.state,
            CompleteOAuthFlow {
                code: "test-code".to_owned(),
                state: "test-state".to_owned(),
            }
        );
        assert_eq!(
            tester.peek_next_state(CallError),
            Complete(FxaState::Disconnected)
        );

        tester.next_state(CompleteOAuthFlowSuccess);
        assert_eq!(tester.state, InitializeDevice);
        assert_eq!(
            tester.peek_next_state(CallError),
            Complete(FxaState::Disconnected)
        );
        assert_eq!(
            tester.peek_next_state(InitializeDeviceSuccess),
            Complete(FxaState::Connected)
        );
    }

    #[test]
    fn test_cancel_oauth_flow() {
        let tester = StateMachineTester::new(AuthenticatingStateMachine, FxaEvent::CancelOAuthFlow);
        assert_eq!(tester.state, Complete(FxaState::Disconnected));
    }
}