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Fix flaky process output reading for dotnet-watch tests (#7173) (#7403)

This commit is contained in:
dotnet-maestro-bot 2019-02-11 16:47:58 -08:00 committed by BrennanConroy
parent c5d8f8c34e
commit 98be5a3ca5
4 changed files with 34 additions and 30 deletions
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33
src/Tools/dotnet-watch/src/Internal/ProcessRunner.cs
View File

@ -37,17 +37,31 @@ namespace Microsoft.DotNet.Watcher.Internal
{
cancellationToken.Register(() => processState.TryKill());
process.OutputDataReceived += (_, a) =>
{
if (!string.IsNullOrEmpty(a.Data))
{
processSpec.OutputCapture.AddLine(a.Data);
}
};
process.ErrorDataReceived += (_, a) =>
{
if (!string.IsNullOrEmpty(a.Data))
{
processSpec.OutputCapture.AddLine(a.Data);
}
};
stopwatch.Start();
process.Start();
_reporter.Verbose($"Started '{processSpec.Executable}' with process id {process.Id}");
if (processSpec.IsOutputCaptured)
{
await Task.WhenAll(
processState.Task,
ConsumeStreamAsync(process.StandardOutput, processSpec.OutputCapture.AddLine),
ConsumeStreamAsync(process.StandardError, processSpec.OutputCapture.AddLine)
);
process.BeginErrorReadLine();
process.BeginOutputReadLine();
await processState.Task;
}
else
{
@ -86,15 +100,6 @@ namespace Microsoft.DotNet.Watcher.Internal
return process;
}
private static async Task ConsumeStreamAsync(StreamReader reader, Action<string> consume)
{
string line;
while ((line = await reader.ReadLineAsync().ConfigureAwait(false)) != null)
{
consume?.Invoke(line);
}
}
private class ProcessState : IDisposable
{
private readonly IReporter _reporter;

15
src/Tools/dotnet-watch/test/DotNetWatcherTests.cs
View File

@ -49,19 +49,8 @@ namespace Microsoft.DotNet.Watcher.Tools.FunctionalTests
await _app.IsWaitingForFileChange();
try
{
File.SetLastWriteTime(source, DateTime.Now);
await _app.HasRestarted();
}
catch (Exception ex)
{
_logger.WriteLine("Retrying. First attempt to restart app failed: " + ex.Message);
// retry
File.SetLastWriteTime(source, DateTime.Now);
await _app.HasRestarted();
}
File.SetLastWriteTime(source, DateTime.Now);
await _app.HasRestarted(TimeSpan.FromMinutes(1));
}
}

7
src/Tools/dotnet-watch/test/Properties/AssemblyInfo.cs Normal file
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@ -0,0 +1,7 @@
// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using Microsoft.AspNetCore.Testing.xunit;
using Xunit;
[assembly: CollectionBehavior(DisableTestParallelization = true)]

9
src/Tools/dotnet-watch/test/Scenario/WatchableApp.cs
View File

@ -42,7 +42,10 @@ namespace Microsoft.DotNet.Watcher.Tools.FunctionalTests
public string SourceDirectory { get; }
public Task HasRestarted()
=> Process.GetOutputLineAsync(StartedMessage, DefaultMessageTimeOut);
=> HasRestarted(DefaultMessageTimeOut);
public Task HasRestarted(TimeSpan timeout)
=> Process.GetOutputLineAsync(StartedMessage, timeout);
public async Task HasExited()
{
@ -50,9 +53,9 @@ namespace Microsoft.DotNet.Watcher.Tools.FunctionalTests
await Process.GetOutputLineStartsWithAsync(WatchExitedMessage, DefaultMessageTimeOut);
}
public async Task IsWaitingForFileChange()
public Task IsWaitingForFileChange()
{
await Process.GetOutputLineStartsWithAsync(WaitingForFileChangeMessage, DefaultMessageTimeOut);
return Process.GetOutputLineStartsWithAsync(WaitingForFileChangeMessage, DefaultMessageTimeOut);
}
public bool UsePollingWatcher { get; set; }