test: add two known broken tests for missing config files

The documentation claims that the database will be set to NULL in this
case, but it is currently not happening. Based on a reproducer [1]
from Austin Ray.

[1]: id:20211021190401.imirxau2ewke6e2m@athena

diff --git a/test/T590-libconfig.sh b/test/T590-libconfig.sh
index a9566c1359b699b46aeec7f0288af7b988647ddd..79bf5805d0a8b7d55d9710764f03698c0d9bffa5 100755 (executable)
--- a/test/T590-libconfig.sh
+++ b/test/T590-libconfig.sh
@@ -849,4 +849,47 @@ zzzafter afterval
 EOF
 test_expect_equal_file EXPECTED OUTPUT
 
+cat <<EOF > c_head3
+#include <notmuch-test.h>
+int main (int argc, char **argv) {
+  notmuch_status_t stat;
+  notmuch_database_t *db = NULL;
+EOF
+
+cat <<EOF > c_tail3
+  printf("db == NULL: %d\n", db == NULL);
+}
+EOF
+
+test_begin_subtest "open: database set to null on missing config"
+test_subtest_known_broken
+cat c_head3 - c_tail3 <<'EOF' | test_C ${MAIL_DIR}
+  notmuch_status_t st = notmuch_database_open_with_config(argv[1],
+                                                         NOTMUCH_DATABASE_MODE_READ_ONLY,
+                                                         "/nonexistent", NULL, &db, NULL);
+EOF
+cat <<EOF> EXPECTED
+== stdout ==
+db == NULL: 1
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "open: database set to null on missing config (env)"
+test_subtest_known_broken
+old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
+NOTMUCH_CONFIG="/nonexistent"
+cat c_head3 - c_tail3 <<'EOF' | test_C ${MAIL_DIR}
+  notmuch_status_t st = notmuch_database_open_with_config(argv[1],
+                                                         NOTMUCH_DATABASE_MODE_READ_ONLY,
+                                                         NULL, NULL, &db, NULL);
+EOF
+NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+cat <<EOF> EXPECTED
+== stdout ==
+db == NULL: 1
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
 test_done