test-lib: Make the test_external_* functions TAP-aware
Before TAP we just ran the Perl test and assumed that it failed if
nothing was printed on STDERR. Continue doing that, but introduce a
`test_external_has_tap' variable which tests can set to indicate that
they're outputting TAP.
If it's set we won't output a test plan, but trust the external test
to do so. That way we can make external tests work with a TAP harness,
but still maintain compatibility with test-lib's own way of tracking
tests through the test-results directory.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t9700-perl-git.sh b/t/t9700-perl-git.sh
index 8686086..0b92726 100755
--- a/t/t9700-perl-git.sh
+++ b/t/t9700-perl-git.sh
@@ -46,6 +46,9 @@
git config --add test.int 2k
'
+# The external test will outputs its own plan
+test_external_has_tap=1
+
test_external_without_stderr \
'Perl API' \
"$PERL_PATH" "$TEST_DIRECTORY"/t9700/test.pl
