Can not run testcase with Grails if testcase is in abstract test-class

Given this hierarchy of test classes:
```
class FileSystemLinuxTests extends AbstractTests
class FileSystemWindowsTests extends AbstractTests
```
I have all test-cases in `AbstractTests` and in subclasses I just instantiate the "filesystem" under test.

**Expected**:
I am able to start a test from within the `AbstractTests` class.

**Actual**:
- If I go to `AbstractTests` and press `Ctrl+Shift+F10` inside a test method, I get the options to start the JUnit tests for one of the sub-classes. No option to use Grails runner.
- If I go to `AbstractTests` and press `Ctrl+Shift+F10` outside the test method, I get the options to start the tests using Grails, but it fails because IDEA doesn't notice this is an abstract class.

---

*Imported from [IDEA-109802](https://youtrack.jetbrains.com/issue/IDEA-109802) · Type: Bug · Votes: 0*
*Comments, attachments, dates and reporter are not part of the export — follow the link above for the full history.*

Reproduce the issue with AbstractTests, FileSystemLinuxTests, and FileSystemWindowsTests in IntelliJ IDEA using Ctrl+Shift+F10 from inside and outside a test method. Trace the Grails test-runner selection and abstract-class handling; done means a test started from AbstractTests offers a working Grails runner without failing on the abstract class.

Written by the indexing model from the issue text.