Why is the Visual Studio 2015/2017/2019 Test Runner not discovering my xUnit v2 tests

Answer 1

Here is the solution that worked for us. Not the best but maybe one can benefit.

Background:

• Our scripts were developed with VS 2013 and used NUnit VS Adapter 2.1..
• Recently we migrated to VS 2017 and when open the same solution - test wouldn't show in the Test Explorer

Upon Build we would see this message:

[Informational] NUnit Adapter 3.10.0.21: Test discovery starting
[Informational] Assembly contains no NUnit 3.0 tests: C:\ihealautomatedTests\SeleniumTest\bin\x86\Debug\SeleniumTest.dll
[Informational] NUnit Adapter 3.10.0.21: Test discovery complete

Solution (temporary):

• Uninstall NUnit Adapter 3.10...
• Install NUnit VS Adapter 2.1..

Now the Tests are shown.