unit-tests: implement the unit-testing framework

This set of patches adds a simple unit-testing framework to Busybox

unit-tests: add some helper macros for unit-test framework implementation
unit-tests: implement the unit-testing framework
unit-tests: add basic documentation on writing the unit test cases
unit-tests: modify the Makefile 'test' target to run unit-tests too
unit-tests: add two example test cases
unit-tests: modify the existing strrstr test code to use the unit-test framework

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/Makefile.custom b/Makefile.custom
index 8c95ef2d4..f8a12831d 100644
--- a/Makefile.custom
+++ b/Makefile.custom
@@ -55,7 +55,11 @@ endif
 # (cp -pPR is POSIX-compliant (cp -dpR or cp -a would not be))
 .PHONY: check
 .PHONY: test
+ifeq ($(CONFIG_UNIT_TEST),y)
+UNIT_CMD = ./busybox unit
+endif
 check test: busybox busybox.links
+        $(UNIT_CMD)
         test -d $(objtree)/testsuite || cp -pPR $(srctree)/testsuite $(objtree)
         bindir=$(objtree) srcdir=$(srctree)/testsuite \
         $(SHELL) -c "cd $(objtree)/testsuite && $(srctree)/testsuite/runtest $(if $(KBUILD_VERBOSE:0=),-v)"