README.md

@@ -8,5 +8,35 @@
  - [doc/building.md](doc/building.md) (markdown version)
  
  See <https://openjdk.org/> for more information about the OpenJDK
  Community and the JDK and see <https://bugs.openjdk.org> for JDK issue
  tracking.
+ 
+ ## Particulars related to Babylon
+ 
+ The Babylon JDK builds like any other JDK, see the build instructions above.
+ 
+ The Babylon API and implementation resides in the incubating model
+ `jdk.incubator.code`. Compilation and execution of dependent code requires
+ that this module be made visible by explicitly adding to the list of modules
+ e.g., such as with the command line option `--add-modules jdk.incubator.code`.
+ 
+ ### Testing
+ 
+ Specific compiler tests can be executed using `jtreg`, for example:
+ 
+ ```
+ jtreg -jdk:./build/macosx-x86_64-server-release/jdk/ -ea -esa -avm -va test/langtools/tools/javac/reflect/
+ ```
+ 
+ Specific runtime tests can be executed using `jtreg`, for example:
+ 
+ ```
+ jtreg -jdk:./build/macosx-x86_64-server-release/jdk/ -ea -esa -avm -va test/jdk/java/lang/reflect/code/
+ ```
+ 
+ In addition, the runtime tests can be executed using make with the test group
+ `jdk_lang_reflect_code` as follows:
+ 
+ ```
+ make test TEST=jdk_lang_reflect_code
+ ```