If a test case is TestNG based, and it uses a module with @library directive, javac fails to compile it, somehow considering testng.jar as a module. Here is the excerpt of the compile error:

```
Anyway, the test creates a SPI implementation as a library module, then try to use it in testng, however the test fails to compile with the following:
/projects/jdk/jdk/cnp/open/test/jdk/java/text/Format/CompactNumberFormat/SPIProviderTest.java:37: error: package org.testng is not visible
import static org.testng.Assert.*;
                 ^
  (package org.testng is declared in the unnamed module, but module org.testng does not read it)
```

The entire .jtr file, as well as the test case are attached.