add regression test infrastructure

b2/Makefile

@@ -93,3 +93,15 @@ spotless:	clean
 try:
 	$(VALGRIND) ./boom HIERARCHY -c CHAR -x CURR -p PROVIDER -i INV \
 	  -s SUBST
+
+# ----- Tests -----------------------------------------------------------------
+
+test tests:	all
+		LANG= sh -c \
+		  'passed=0 && cd test && \
+		  for n in [a-z]*; do \
+		  [ $$n != core ] && SCRIPT=$$n . ./$$n; done; \
+		  echo "Passed all $$passed tests"'
+
+valgrind:
+		VALGRIND="valgrind -q" $(MAKE) tests