Update CODEBASE.md to account for new testing standards.
BuildIntegrationTestCase has been greatly enabled in the past six months or so, and we believe that future testing should utilize this framework instead of AbstractBlackBoxTest. Beyond the reasons listed in this CL's modifications, AbstractBlackBoxTest has only seven extending classes compared to BuildIntegrationTestCase's thirty-seven.
@@ -1662,10 +1662,13 @@ Of integration tests, we have two kinds:
1. Ones implemented using a very elaborate bash test framework under
`src/test/shell`
2. Ones implemented in Java. These are implemented as subclasses of
- `AbstractBlackBoxTest`.
+ 'BuildIntegrationTestCase'.
-`AbstractBlackBoxTest` has the virtue that it works on Windows, too, but most of
-our integration tests are written in bash.
+`BuildIntegrationTestCase` is the preferred integration testing framework as it
+is well-equipped for most testing scenarios. As it is a Java framework, it
+provides debuggability and seamless integration with many common development
+tools. There are many examples of `BuildIntegrationTestCase` classes in the
+Bazel repository.
Analysis tests are implemented as subclasses of `BuildViewTestCase`. There is a
scratch file system you can use to write BUILD files, then various helper
