public void ContinueCheckingStrategiesAfterBeingHandled()
{
var counter = 0;
var context = new ErrorHandlingContext(this, ErrorSeverityLevel.NonFatal, new Exception());
var strategy1 = new Mock <IErrorHandlingStrategy>();
strategy1.Setup(o => o.Handle(context)).Callback(() =>
{
context.MarkErrorAsHandled();
counter++;
});
var strategy2 = new Mock <IErrorHandlingStrategy>();
strategy2.Setup(o => o.Handle(context)).Callback(() =>
{
counter++;
});
var target = new CompositeErrorHandlingStrategy();
target.AddStrategy(strategy1.Object);
target.AddStrategy(strategy2.Object);
target.Handle(context);
Assert.AreEqual(2, counter);
}
public void ExecutesAllStrategiesInTheOriginalOrder()
{
var counter = 0;
var context = new ErrorHandlingContext(this, ErrorSeverityLevel.NonFatal, new Exception());
var strategy1 = new Mock <IErrorHandlingStrategy>();
strategy1.Setup(o => o.Handle(context)).Callback(() =>
{
Assert.AreEqual(0, counter);
counter++;
});
var strategy2 = new Mock <IErrorHandlingStrategy>();
strategy2.Setup(o => o.Handle(context)).Callback(() =>
{
Assert.AreEqual(1, counter);
counter++;
});
var target = new CompositeErrorHandlingStrategy();
target.AddStrategy(strategy1.Object);
target.AddStrategy(strategy2.Object);
target.Handle(context);
Assert.AreEqual(2, counter);
}
public void ThrowAnExceptionWhenRemovingAStrategyThatDoesNotExist()
{
var strategy = new Mock <IErrorHandlingStrategy>();
var target = new CompositeErrorHandlingStrategy();
Assert.Throws <ArgumentException>(() => target.RemoveStrategy(strategy.Object));
}
public void ThrowAnExceptionWhenAddingADuplicateStrategy()
{
var strategy = new Mock <IErrorHandlingStrategy>();
var target = new CompositeErrorHandlingStrategy();
target.AddStrategy(strategy.Object);
Assert.Throws <ArgumentException>(() => target.AddStrategy(strategy.Object));
}
public void ThrowAnExceptionForDuplicateStrategies2()
{
var strategy = new Mock <IErrorHandlingStrategy>();
IEnumerable <IErrorHandlingStrategy> strategies = new[]
{
strategy.Object,
strategy.Object
};
Assert.Throws <ArgumentException>(() => CompositeErrorHandlingStrategy.Create(strategies));
}
/// <summary>
/// Creates a <see cref="CompositeErrorHandlingStrategy"/> from the strategies provided.
/// </summary>
/// <param name="strategies">The strategies to add to the composite result.</param>
/// <returns>A <see cref="CompositeErrorHandlingStrategy"/> instance.</returns>
public static CompositeErrorHandlingStrategy Create(IEnumerable <IErrorHandlingStrategy> strategies)
{
if (strategies == null)
{
throw new ArgumentNullException(nameof(strategies));
}
var result = new CompositeErrorHandlingStrategy();
foreach (var strategy in strategies)
{
result.AddStrategy(strategy);
}
return(result);
}
public void ThrowAnExceptionWhenAddingANullStrategy()
{
var target = new CompositeErrorHandlingStrategy();
Assert.Throws <ArgumentNullException>(() => target.AddStrategy(null));
}
public void ThrowAnExceptionForDuplicateStrategies1()
{
var strategy = new Mock <IErrorHandlingStrategy>();
Assert.Throws <ArgumentException>(() => CompositeErrorHandlingStrategy.Create(strategy.Object, strategy.Object));
}
