60 lines
1.9 KiB
C#
60 lines
1.9 KiB
C#
using System;
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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 DynamicCompilation
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{
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[Fact]
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public async Task DoesNotPreventStackTrace()
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{
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// Arrange
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var expression = Expression.Throw(
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Expression.New(
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typeof(ArgumentException).GetConstructor(
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new Type[] {typeof(string)}),
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Expression.Constant( "Message")));
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var lambda = Expression.Lambda<Action>(expression);
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var action = lambda.Compile();
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// Act
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Exception demystifiedException = null;
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try
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{
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await Task.Run(() => action()).ConfigureAwait(false);
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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 = stackTrace.Split(Environment.NewLine)
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// Remove items that vary between test runners
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.Where(s =>
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s != " at void System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, object state)" &&
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s != " at Task Demystify.DynamicCompilation.DoesNotPreventStackTrace()+()=>{}"
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)
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.ToArray();
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Assert.Equal(
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new[] {
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"System.ArgumentException: Message",
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" at void lambda_method(Closure)",
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" at async Task Demystify.DynamicCompilation.DoesNotPreventStackTrace()"},
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trace);
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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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