MVC Razor tests failing since the 10th

[dougbu]

Functional tests are failing because await output.GetChildContentAsync(encoder) no longer changes the HTML encoder used when rendering the child content.

See Microsoft.AspNetCore.Mvc.FunctionalTests.TagHelpersTest.EncodersPages_ReturnExpectedContent(...) tests. Only the test using the default encoder works as expected.

[dougbu]

Also seeing failures in Microsoft.AspNetCore.Mvc.Razor.Host.Test and Microsoft.AspNetCore.Mvc.Razor.Test which may be related. Unfortunately, failing tests in Microsoft.AspNetCore.Mvc.Razor.Host.Test look like problems with generated class names and chosen TModel replacements. So, this issue may represent a cluster of recent Razor-related issues in MVC.

[dougbu]

Generalized the issue subject since the HTML encoder choice is not the only issue.