public void Execute_throws_ArgumentException_if_parameter_wrong_type()
{
var sut = new StateTransitionParameterized <Sale, SaleState, SaleEvent, string>(
stateAccessor: sale => sale.State
, stateMutator: (sale, newState) => sale.State = newState
, toState: SaleState.Complete
, condition: (_, parameter) => parameter == "yes"
, name: "test"
, priority: 1);
Assert.Throws <ArgumentException>(() => sut.Execute(new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, new Sale(saleID: 9), request: 0)));
}
public void Execute_doesnt_transition_if_condition_not_met()
{
var testSale = new Sale(saleID: 55)
{
State = SaleState.Open
};
var sut = new StateTransitionParameterized <Sale, SaleState, SaleEvent, string>(
stateAccessor: sale => sale.State
, stateMutator: (sale, newState) => sale.State = newState
, toState: SaleState.Complete
, condition: (_, parameter) => parameter == "yes"
, name: "test"
, priority: 1);
sut.Execute(new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, testSale, request: "NO"));
Assert.Equal(SaleState.Open, testSale.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 StateTransitionParameterized <Sale, SaleState, SaleEvent, string>(
stateAccessor: saleToUpdate => saleToUpdate.State
, stateMutator: (saleToUpdate, newState) => saleToUpdate.State = newState
, toState: endState
, conditionAsync: (_, stringParam, inCancelToken) => Task.FromResult(result: false)
, name: "test"
, priority: 1);
await sut.ExecuteAsync(new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, sale, request : "notUsed"));
Assert.Equal(startState, sale.State);
}
public async Task ExecuteAsync_throws_ArgumentException_if_Request_is_wrong_type()
{
const SaleState startState = SaleState.Open;
var sale = new Sale(saleId: 66)
{
State = startState
};
var sut = new StateTransitionParameterized <Sale, SaleState, SaleEvent, string>(
stateAccessor: saleToUpdate => saleToUpdate.State
, stateMutator: (saleToUpdate, newState) => saleToUpdate.State = newState
, toState: SaleState.Complete
, conditionAsync: (_, stringParam, cancelToken) => Task.FromResult(result: true)
, name: "test"
, priority: 1);
using var cancelSource = new CancellationTokenSource();
{
var cancelToken = cancelSource.Token;
var executionParams = new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, sale, request: 1, cancellationToken: cancelToken);
await Assert.ThrowsAsync <ArgumentException>(async() => await sut.ExecuteAsync(executionParams));
}
}
public void Execute_sends_notification_if_transition_successful()
{
var testSale = new Sale(saleID: 55)
{
State = SaleState.Open
};
var sut = new StateTransitionParameterized <Sale, SaleState, SaleEvent, string>(
stateAccessor: sale => sale.State
, stateMutator: (sale, newState) => sale.State = newState
, toState: SaleState.Complete
, condition: (_, parameter) => parameter == "yes"
, name: "test"
, priority: 1);
var notificationReceived = false;
StateTransitionParameterized <Sale, SaleState, SaleEvent, string> .OnTransitionedEvent += (sale, _) => notificationReceived = true;
sut.Execute(new ExecutionParameters <Sale, SaleEvent>(SaleEvent.Pay, testSale, request: "yes"));
Assert.True(notificationReceived);
}
