public void IsSatisfiedBy_NoChildren_False()
{
// Arrange
var spec = new AndSpecification <AlertEvaluationMessage>();
var message = new AlertEvaluationMessage();
// Act
var result = spec.IsSatisfiedBy(message);
// Assert
result.Should().BeFalse();
}
public void IsSatisfiedBy_NoOperator_False()
{
// Arrange
var alertCriteria = new AlertCriteria();
var spec = new PriceSpecification(alertCriteria);
var message = new AlertEvaluationMessage();
// Act
var result = spec.IsSatisfiedBy(message);
// Assert
result.Should().BeFalse();
}
public void IsSatisfiedBy_OneTrueChild_True()
{
// Arrange
var spec = new AndSpecification <AlertEvaluationMessage>();
spec.AddChildSpecification(new TrueSpecification <AlertEvaluationMessage>());
var message = new AlertEvaluationMessage();
// Act
var result = spec.IsSatisfiedBy(message);
// Assert
result.Should().BeTrue();
}
public void IsSatisfiedBy_LessThanOrEqual_LastPriceEqualLevel_PrevLastPriceGreaterThanLevel_True()
{
// Arrange
var alertCriteria = new AlertCriteria {
Operator = CriteriaOperator.LessThanOrEqualTo, Level = 50
};
var spec = new PriceSpecification(alertCriteria);
var message = new AlertEvaluationMessage {
LastPrice = 50, PreviousLastPrice = 50.1M
};
// Act
var result = spec.IsSatisfiedBy(message);
// Assert
result.Should().BeTrue();
}
public void IsSatisfiedBy_EqualTo_LastPriceLessThanLevel_PrevLastPriceEqualLevel_False()
{
// Arrange
var alertCriteria = new AlertCriteria {
Operator = CriteriaOperator.Equals, Level = 50
};
var spec = new PriceSpecification(alertCriteria);
var message = new AlertEvaluationMessage {
LastPrice = 49, PreviousLastPrice = 50
};
// Act
var result = spec.IsSatisfiedBy(message);
// Assert
result.Should().BeFalse();
}
public void IsSatisfiedBy_LessThanOrEqual_LastPercentGreaterThanLevel_PrevLastPercentEqualLevel_False()
{
// Arrange
var alertCriteria = new AlertCriteria {
Operator = CriteriaOperator.LessThanOrEqualTo, Level = 0.02M
};
var spec = new DailyPercentageGainLossSpecification(alertCriteria);
var message = new AlertEvaluationMessage {
OpenPrice = 1, LastPrice = 1.03M, PreviousLastPrice = 1.02M
};
// Act
var result = spec.IsSatisfiedBy(message);
// Assert
result.Should().BeFalse();
}
public async Task EvaluateAsync(AlertEvaluationMessage message)
{
if (Status == AlertDefinitionStatuses.Enabled)
{
if (!LastSent.HasValue || DateTimeOffset.UtcNow.Date > LastSent.Value.Date) // Alert not already sent today
{
var specification = _alertCriteriaSpecificationFactory.CreateSpecification(this);
if (specification.IsSatisfiedBy(message))
{
var subject = $"Stock Alert Triggered: {Stock.Symbol}";
var notificationMessage = $"Stock Alert Triggered {Environment.NewLine}" +
$"Notification Name: {Name}{Environment.NewLine}" +
$"Stock: {Stock.Symbol} ({message.LastPrice:C}){Environment.NewLine}" +
$"Criteria: {RootCriteria}{Environment.NewLine}";
await TriggerAlertAsync(subject, notificationMessage);
}
}
}
}
private async Task EnqueueAlertEvaluationMessages(Stock stock)
{
var alertDefinitions = await _alertDefinitionsRepository.GetAlertDefinitionsByStockIdAsync(stock.StockId);
foreach (var alertDefinition in alertDefinitions)
{
// Create and enqueue SB message
var alertProcessingMessage = new AlertEvaluationMessage
{
AlertDefinitionId = alertDefinition.AlertDefinitionId,
LastPrice = stock.LastPrice,
PreviousLastPrice = stock.PreviousLastPrice
};
var messageBodyJson = JsonConvert.SerializeObject(alertProcessingMessage);
var message = new Message(Encoding.UTF8.GetBytes(messageBodyJson));
await _alertProcessingQueueClient.SendAsync(message);
}
}
public async Task EvaluateAlertAsync(AlertEvaluationMessage message)
{
var alertDefinition = await _alertDefinitionsRepository.GetAlertDefinitionAsync(message.AlertDefinitionId);
await alertDefinition.EvaluateAsync(message);
}
