Default TESTSDIR to /usr/tests/${RELDIR:H}

When run from bin/ls/tests, for example, the value of TESTSDIR would be
${TESTSBASE}/${RELDIR:H} -> /usr/tests/bin/ls/tests/.. ->
/usr/tests/bin/ls

Document the new behavior in bsd.README.

While here, also document TESTSBASE

Relnotes: yes
Differential Revision: D1022
MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division

2 files changed, 9 insertions, 4 deletions

diff --git a/share/mk/bsd.README b/share/mk/bsd.README
index 018374f..cb6e41f 100644
--- a/share/mk/bsd.README
+++ b/share/mk/bsd.README
@@ -474,10 +474,16 @@ It has seven targets:
 
 It sets/uses the following variables, among many others:
 
-TESTDIR		Path to the installed tests.  Must be a subdirectory of
+TESTSBASE	Installation prefix for tests. Defaults to /usr/tests
+
+TESTSDIR	Path to the installed tests.  Must be a subdirectory of
 		TESTSBASE and the subpath should match the relative
 		location of the tests within the src tree.
 
+		The value of TESTSDIR defaults to
+		${TESTSBASE}/${RELDIR:H} , e.g. /usr/tests/bin/ls when
+		included from bin/ls/tests .
+
 KYUAFILE	If 'auto' (the default), generate a Kyuafile out of the
 		test programs defined in the Makefile.  If 'yes', then a
 		manually-crafted Kyuafile must be supplied with the
diff --git a/share/mk/bsd.test.mk b/share/mk/bsd.test.mk
index c15f82e..86351cf 100644
--- a/share/mk/bsd.test.mk
+++ b/share/mk/bsd.test.mk
@@ -10,9 +10,8 @@
 
 __<bsd.test.mk>__:
 
-.ifndef TESTSDIR
-.error "Please define TESTSDIR when including bsd.test.mk"
-.endif
+# Tests install directory
+TESTSDIR?=	${TESTSBASE}/${RELDIR:H}
 
 # List of subdirectories containing tests into which to recurse.  This has the
 # same semantics as SUBDIR at build-time.  However, the directories listed here