public void Test_LogsOnExecute()
{
// Arrange
var queryMock = new Mock <IQuery <int, int> >();
var expected = 5;
queryMock.Setup(x => x.Execute(It.IsAny <int>())).Returns(expected);
var loggerMock = new Mock <ILogger <LoggingQueryDecorator <int, int> > >();
var decorator = new LoggingQueryDecorator <int, int>(queryMock.Object, loggerMock.Object);
// Act
var result = decorator.Execute(2);
// Assert
Assert.Equal(expected, result);
queryMock.Verify(x => x.Execute(It.IsAny <int>()), Times.Once);
// check if there's only one log entry
loggerMock.Verify(l => l.Log(
It.IsAny <LogLevel>(),
It.IsAny <EventId>(),
It.IsAny <It.IsAnyType>(),
It.IsAny <ArgumentException>(),
(Func <It.IsAnyType, Exception, string>)It.IsAny <object>()), Times.Once);
// and that it has LogLevel of Information
loggerMock.Verify(l => l.Log(
LogLevel.Information,
It.IsAny <EventId>(),
It.IsAny <It.IsAnyType>(),
It.IsAny <ArgumentException>(),
(Func <It.IsAnyType, Exception, string>)It.IsAny <object>()), Times.Once);
}
public static IQueryHandler <TQuery, TResponse> Default <TQuery, TResponse>(object handler, IServiceProvider provider) where TQuery : IQuery <TResponse>
{
var logger = provider.GetService <ILogger>();
var validations = provider.GetServices <IValidator <TQuery> >();
var loggingDecorator = new LoggingQueryDecorator <TQuery, TResponse>((IQueryHandler <TQuery, TResponse>)handler, logger);
var validationDecorator = new ValidationQueryDecorator <TQuery, TResponse>(loggingDecorator, validations);
var retryDecorator = new RetryQueryDecorator <TQuery, TResponse>(validationDecorator, logger);
return(retryDecorator); // order is revers for decorators
}