public async Task ExecuteAsync_does_not_execute_if_CancelRequested()
{
const SaleState startState = SaleState.Open;
var sale = new Sale(saleId: 66)
{
State = startState
};
var sut = new StateTransition <Sale, SaleState, SaleEvent>(
stateAccessor: saleToUpdate => saleToUpdate.State
, stateMutator: (saleToUpdate, newState) => saleToUpdate.State = newState
, toState: SaleState.Complete
, conditionAsync: (_, inCancelToken) => Task.FromResult(result: true)
, name: "test"
, priority: 1);
using var cancelSource = new CancellationTokenSource();
var cancelToken = cancelSource.Token;
cancelSource.Cancel();
var parameters = new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, sale, request: null, cancellationToken: cancelToken);
var result = await sut.ExecuteAsync(parameters);
Assert.True(result.WasCancelled);
Assert.False(result.WasTransitioned);
Assert.Equal(startState, sale.State);
}
public void ExecuteAsync_ConditionAsync_can_be_cancelled()
{
const SaleState startState = SaleState.Open;
var sale = new Sale(saleId: 66)
{
State = startState
};
var sut = new StateTransition <Sale, SaleState, SaleEvent>(
stateAccessor: saleToUpdate => saleToUpdate.State
, stateMutator: (saleToUpdate, newState) => saleToUpdate.State = newState
, toState: SaleState.Complete
, conditionAsync: (_, cancellationToken) =>
{
Task.Delay(millisecondsDelay: 999999, cancellationToken: cancellationToken);
return(Task.FromResult(!cancellationToken.IsCancellationRequested));
}
, name: "test"
, priority: 1);
using var cancelSource = new CancellationTokenSource();
var parameters = new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, sale, cancellationToken: cancelSource.Token);
Task.Run(async() => await sut.ExecuteAsync(parameters), cancelSource.Token);
cancelSource.Cancel();
Assert.Equal(startState, sale.State);
}
public async Task ExecuteAsync_does_not_change_state_if_condition_not_met()
{
const SaleState startState = SaleState.Open;
const SaleState endState = SaleState.Complete;
var sale = new Sale(saleId: 66)
{
State = startState
};
var sut = new StateTransition <Sale, SaleState, SaleEvent>(
stateAccessor: saleToUpdate => saleToUpdate.State
, stateMutator: (saleToUpdate, newState) => saleToUpdate.State = newState
, toState: endState
, conditionAsync: (_, inCancelToken) => Task.FromResult(result: false)
, name: "test"
, priority: 1);
var result = await sut.ExecuteAsync(new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, sale));
Assert.False(result.WasTransitioned);
Assert.Equal(startState, sale.State);
}
