Console.WriteLine calls during dotnet test are not emitted to the console on Windows

[livarcocc]

From @jonsequitur on December 15, 2016 19:10

Steps to reproduce

• Add a Console.WriteLine call in a test, .e.g GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndReferences
• On Windows, dotnet test --test-case-filter "FullyQualifiedName=Microsoft.DotNet.Migration.Tests.GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndR eferences"

Expected behavior

The string passed to Console.WriteLine appears in console output.

Actual behavior

C:\dev\github\cli\test\dotnet-migrate.Tests [rel/1.0.0 ↓ +0 ~2 -0 !]> dotnet test --test-case-filter "FullyQualifiedName=Microsoft.DotNet.Migration.Tests.GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndR
eferences"
Build started, please wait...
Build completed.

Test run for C:\dev\github\cli\test\dotnet-migrate.Tests\bin\Debug\netcoreapp1.0\dotnet-migrate.Tests.dll(.NETCoreApp,Version=v1.0)
Microsoft (R) Test Execution Command Line Tool Version 15.0.0.0
Copyright (c) Microsoft Corporation.  All rights reserved.

Starting test execution, please wait...
Passed   Microsoft.DotNet.Migration.Tests.GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndReferences(projectName: "ProjectB", expectedProjects: "ProjectB,ProjectC,ProjectD,ProjectE")
Passed   Microsoft.DotNet.Migration.Tests.GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndReferences(projectName: "ProjectA", expectedProjects: "ProjectA,ProjectB,ProjectC,ProjectD,ProjectE")
Passed   Microsoft.DotNet.Migration.Tests.GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndReferences(projectName: "ProjectC", expectedProjects: "ProjectC,ProjectD,ProjectE")
Passed   Microsoft.DotNet.Migration.Tests.GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndReferences(projectName: "ProjectE", expectedProjects: "ProjectE")
Passed   Microsoft.DotNet.Migration.Tests.GivenThatIWantToMigrateTestApps.ItMigratesRootProjectAndReferences(projectName: "ProjectD", expectedProjects: "ProjectD")

Total tests: 5. Passed: 5. Failed: 0. Skipped: 0.
Test Run Successful.
Test execution time: 32.2825 Seconds

Environment data

dotnet --info output:

.NET Command Line Tools (1.0.0-preview5-004253)

Product Information: Version: 1.0.0-preview5-004253 Commit SHA-1 hash: 0caae96daf

Runtime Environment: OS Name: Windows OS Version: 10.0.14393 OS Platform: Windows RID: win10-x64 Base Path: C:\dev\github\cli\artifacts\win10-x64\stage2\sdk\1.0.0-preview5-004253

Copied from original issue: dotnet/cli#5033