Handle also test/lib-src directory

* test/Makefile.in (SUBDIRS): Add lib-src.

* test/README: Add predefined selectors.

* test/file-organization.org: Mention test/lib-src directory.

3 files changed, 13 insertions, 9 deletions

diff --git a/test/Makefile.in b/test/Makefile.in
index 4ca43c8c443..c5e86df3761 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -247,7 +247,7 @@ endef
 $(foreach test,${TESTS},$(eval $(call test_template,${test})))
 
 ## Get the tests for only a specific directory.
-SUBDIRS = $(sort $(shell find lisp src -type d ! -path "*resources*" -print))
+SUBDIRS = $(sort $(shell find lib-src lisp src -type d ! -path "*resources*" -print))
 
 define subdir_template
   .PHONY: check-$(subst /,-,$(1))
diff --git a/test/README b/test/README
index 58f5f38bec6..5f3c10adbe1 100644
--- a/test/README
+++ b/test/README
@@ -60,7 +60,9 @@ https://www.gnu.org/software/emacs/manual/html_node/ert/Test-Selectors.html
 
 You could use predefined selectors of the Makefile.  "make <filename>
 SELECTOR='$(SELECTOR_DEFAULT)'" runs all tests for <filename>.el
-except the tests tagged as expensive or unstable.
+except the tests tagged as expensive or unstable.  Other predefined
+selectors are $(SELECTOR_EXPENSIVE) (run all tests except unstable
+ones) and $(SELECTOR_ALL) (run all tests).
 
 If your test file contains the tests "test-foo", "test2-foo" and
 "test-foo-remote", and you want to run only the former two tests, you
diff --git a/test/file-organization.org b/test/file-organization.org
index efc354529c5..7cf5b88d6d0 100644
--- a/test/file-organization.org
+++ b/test/file-organization.org
@@ -17,13 +17,15 @@ Sub-directories are in many cases themed after packages (~gnus~, ~org~,
 ~calc~), related functionality (~net~, ~emacs-lisp~, ~progmodes~) or status
 (~obsolete~).
 
-C source is stored in the ~src~ directory, which is flat.
+C source is stored in the ~src~ directory, which is flat.  Source for
+utility programs is stored in the ~lib-src~ directory.
 
 ** Test Files
 
 Automated tests should be stored in the ~test/lisp~ directory for
-tests of functionality implemented in Lisp, and in the ~test/src~
-directory for functionality implemented in C.  Tests should reflect
+tests of functionality implemented in Lisp, in the ~test/src~
+directory for functionality implemented in C, and in the
+~test/lib-src~ directory for utility programs.  Tests should reflect
 the directory structure of the source tree; so tests for files in the
 ~lisp/emacs-lisp~ source directory should reside in the
 ~test/lisp/emacs-lisp~ directory.
@@ -36,10 +38,10 @@ files of any name which are themselves placed in a directory named
 after the feature with ~-tests~ appended, such as
 ~/test/lisp/emacs-lisp/eieio-tests~
 
-Similarly, features implemented in C should reside in ~/test/src~ and
-be named after the C file with ~-tests.el~ added to the base-name of
-the tested source file.  Thus, tests for ~src/fileio.c~ should be in
-~test/src/fileio-tests.el~.
+Similarly, tests of features implemented in C should reside in
+~/test/src~ or in ~test/lib-src~ and be named after the C file with
+~-tests.el~ added to the base-name of the tested source file.  Thus,
+tests for ~src/fileio.c~ should be in ~test/src/fileio-tests.el~.
 
 There are also some test materials that cannot be run automatically
 (i.e. via ert).  These should be placed in ~/test/manual~; they are