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test: Fix race condition in T568-lib-thread.sh

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The assignment of thread-ids is (apparently) non-deterministic in a
way that mostly seems to show up on multicore machines. In my tests
the number is different from that previously assumed by this test
about 15% of the time on a 50 thread (25 core) Xeon.

Since message id's are fixed, use a message known to be in the thread
of interest to pick out the correct thread-id.
This commit is contained in:
David Bremner 2021-02-14 20:55:55 -04:00
parent 6db8b422d9
commit a37d5f5976
1 changed files with 8 additions and 2 deletions
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10
test/T568-lib-thread.sh
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@ -8,6 +8,11 @@ add_email_corpus
test_begin_subtest "building database"
test_expect_success "NOTMUCH_NEW"
test_begin_subtest "finding thread"
THREAD=$(notmuch search --output=threads id:20091117190054.GU3165@dottiness.seas.harvard.edu)
count=$(notmuch count $THREAD)
test_expect_equal "$count" "7"
cat <<'EOF' > c_tail
if (stat) {
const char *stat_str = notmuch_database_status_string (db);
@ -30,7 +35,7 @@ int main (int argc, char** argv)
notmuch_thread_t *thread = NULL;
notmuch_threads_t *threads = NULL;
notmuch_query_t *query = NULL;
const char *id = "thread:0000000000000009";
const char *id = "${THREAD}";
stat = notmuch_database_open_verbose (argv[1], NOTMUCH_DATABASE_MODE_READ_WRITE, &db, &msg);
if (stat != NOTMUCH_STATUS_SUCCESS) {
@ -52,10 +57,11 @@ cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
printf("%d\n%s\n", thread != NULL, id2);
}
EOF
thread_num=${THREAD#thread:}
cat <<EOF > EXPECTED
== stdout ==
1
0000000000000009
${thread_num}
== stderr ==
EOF
test_expect_equal_file EXPECTED OUTPUT