[PATCH v2 6/8] pack-object & index-pack: add test for --threads warning under NO_PTHREADS

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Add a test for the warning that's emitted when --threads or
pack.threads is provided under NO_PTHREADS. This uses the new PTHREADS
prerequisite.

The assertion for !GETTEXT_POISON in the latter test is currently
redundant, since unlike index-pack the pack-objects warnings aren't
i18n'd. However they might be changed to be i18n'd in the future, and
there's no harm in future-proofing the test.

There's an existing bug in the implementation of pack-objects which
this test currently tests for as-is. Details about the bug & the fix
are included in a follow-up change.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 t/t5300-pack-object.sh | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/t/t5300-pack-object.sh b/t/t5300-pack-object.sh
index 43a672c345..6bb6a8981b 100755
--- a/t/t5300-pack-object.sh
+++ b/t/t5300-pack-object.sh
@@ -421,6 +421,40 @@ test_expect_success 'index-pack <pack> works in non-repo' '
 	test_path_is_file foo.idx
 '
 
+test_expect_success !PTHREADS,!GETTEXT_POISON 'index-pack --threads=N or pack.threads=N warns when no pthreads' '
+	test_must_fail git index-pack --threads=2 2>err &&
+	grep ^warning: err >warnings &&
+	test_line_count = 1 warnings &&
+	grep "no threads support, ignoring --threads=2" err &&
+	test_must_fail git -c pack.threads=2 index-pack 2>err &&
+	grep ^warning: err >warnings &&
+	test_line_count = 1 warnings &&
+	grep "no threads support, ignoring pack\.threads" err &&
+	test_must_fail git -c pack.threads=2 index-pack --threads=4 2>err &&
+	grep ^warning: err >warnings &&
+	test_line_count = 2 warnings &&
+	grep "no threads support, ignoring --threads=4" err &&
+	grep "no threads support, ignoring pack\.threads" err
+'
+
+test_expect_success !PTHREADS,!GETTEXT_POISON 'pack-objects --threads=N or pack.threads=N warns when no pthreads' '
+	git pack-objects --threads=2 --stdout --all </dev/null >/dev/null 2>err &&
+	grep ^warning: err >warnings &&
+	test_line_count = 1 warnings &&
+	grep "no threads support, ignoring --threads" err &&
+	git -c pack.threads=2 pack-objects --stdout --all </dev/null >/dev/null 2>err &&
+	cat err &&
+	grep ^warning: err >warnings &&
+	test_line_count = 2 warnings &&
+	grep "no threads support, ignoring --threads" err &&
+	grep "no threads support, ignoring pack\.threads" err &&
+	git -c pack.threads=2 pack-objects --threads=4 --stdout --all </dev/null >/dev/null 2>err &&
+	grep ^warning: err >warnings &&
+	test_line_count = 2 warnings &&
+	grep "no threads support, ignoring --threads" err &&
+	grep "no threads support, ignoring pack\.threads" err
+'
+
 #
 # WARNING!
 #
-- 
2.11.0