89 lines
3.5 KiB
C#
89 lines
3.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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using Xunit;
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namespace Demystify
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{
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public class AggregateException
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{
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[Fact]
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public void DemystifiesAggregateExceptions()
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{
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Exception demystifiedException = null;
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try
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{
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var tasks = new List<Task>
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{
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Task.Run(async () => await Throw1()),
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Task.Run(async () => await Throw2()),
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Task.Run(async () => await Throw3())
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};
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Task.WaitAll(tasks.ToArray());
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}
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catch (Exception ex)
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{
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demystifiedException = ex.Demystify();
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}
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// Assert
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var stackTrace = demystifiedException.ToString();
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stackTrace = ReplaceLineEndings.Replace(stackTrace, "");
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var trace = string.Join("", stackTrace.Split(new[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries)
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// Remove items that vary between test runners
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.Where(s =>
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s != " at Task Demystify.DynamicCompilation.DoesNotPreventStackTrace()+() => { }" &&
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!s.Contains("System.Threading.Tasks.Task.WaitAll")
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)
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.Skip(1)
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.ToArray())
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// Remove Full framework back arrow
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.Replace("<---", "");
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var expected = string.Join("", new[] {
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" at async Task Demystify.AggregateException.Throw1()",
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" at async void Demystify.AggregateException.DemystifiesAggregateExceptions()+(?) => { }",
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" --- End of inner exception stack trace ---",
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" at void Demystify.AggregateException.DemystifiesAggregateExceptions()",
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"---> (Inner Exception #0) System.ArgumentException: Value does not fall within the expected range.",
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" at async Task Demystify.AggregateException.Throw1()",
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" at async void Demystify.AggregateException.DemystifiesAggregateExceptions()+(?) => { }",
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"---> (Inner Exception #1) System.NullReferenceException: Object reference not set to an instance of an object.",
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" at async Task Demystify.AggregateException.Throw2()",
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" at async void Demystify.AggregateException.DemystifiesAggregateExceptions()+(?) => { }",
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"---> (Inner Exception #2) System.InvalidOperationException: Operation is not valid due to the current state of the object.",
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" at async Task Demystify.AggregateException.Throw3()",
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" at async void Demystify.AggregateException.DemystifiesAggregateExceptions()+(?) => { }"});
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Assert.Equal(expected, trace);
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}
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async Task Throw1()
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{
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await Task.Delay(1).ConfigureAwait(false);
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throw new ArgumentException();
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}
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async Task Throw2()
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{
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await Task.Delay(1).ConfigureAwait(false);
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throw new NullReferenceException();
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}
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async Task Throw3()
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{
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await Task.Delay(1).ConfigureAwait(false);
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throw new InvalidOperationException();
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}
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private Regex ReplaceLineEndings = new Regex(" in [^\n\r]+");
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}
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}
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