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tests: improve code coverage support

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Fix the exclusion path for lcov; it should exclude the directory
with source code, not object files.

Use the COV environment variable to
* control whether we build for coverage or not
* select the output directory

Add a separate target for generating the report, so we can get a
report for all of the tests together or just a single test.

Add documentation.

Signed-off-by: Paul Fagerburg <pfagerburg@google.com>
Change-Id: I2bd2bfdedfab291aabeaa968c10b17e9b61c9c0a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54072
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
This commit is contained in:
Paul Fagerburg
2021-05-11 09:56:48 -06:00
committed by Paul Fagerburg
parent 12c0542e6f
commit de6cbac3c4
4 changed files with 104 additions and 14 deletions
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4
Makefile
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@@ -124,8 +124,8 @@ ifneq ($(filter help%, $(MAKECMDGOALS)), )
NOCOMPILE:=1
UNIT_TEST:=1
else
ifneq ($(filter %-test %-tests, $(MAKECMDGOALS)),)
ifneq ($(filter-out %-test %-tests, $(MAKECMDGOALS)),)
ifneq ($(filter %-test %-tests %coverage-report, $(MAKECMDGOALS)),)
ifneq ($(filter-out %-test %-tests %coverage-report, $(MAKECMDGOALS)),)
$(error Cannot mix unit-tests targets with other targets)
endif
UNIT_TEST:=1