test/libconfig: use 'export' for remaining sets of NOTMUCH_CONFIG

It makes the tests easier to understand if we always use export for
environment variables.

diff --git a/test/T590-libconfig.sh b/test/T590-libconfig.sh
index 8db51ed043753e8408cdfc519921dc1bc92dccb8..891ffb4f0b19048d6f9125e5f0825c1c3ea53967 100755 (executable)
--- a/test/T590-libconfig.sh
+++ b/test/T590-libconfig.sh
@@ -876,13 +876,13 @@ test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "open: database set to null on missing config (env)"
 old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
-NOTMUCH_CONFIG="/nonexistent"
+export 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}
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
 cat <<EOF> EXPECTED
 == stdout ==
 db == NULL: 1
@@ -903,12 +903,12 @@ test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "create: database set to null on missing config (env)"
 old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
-NOTMUCH_CONFIG="/nonexistent"
+export NOTMUCH_CONFIG="/nonexistent"
 cat c_head3 - c_tail3 <<'EOF' | test_C ${MAIL_DIR}
   notmuch_status_t st = notmuch_database_create_with_config(argv[1],
                                                          NULL, NULL, &db, NULL);
 EOF
-NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
 cat <<EOF> EXPECTED
 == stdout ==
 db == NULL: 1
@@ -929,11 +929,11 @@ test_expect_equal_file EXPECTED OUTPUT
 
 test_begin_subtest "load_config: database non-null on missing config (env)"
 old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
-NOTMUCH_CONFIG="/nonexistent"
+export NOTMUCH_CONFIG="/nonexistent"
 cat c_head3 - c_tail3 <<'EOF' | test_C ${MAIL_DIR}
   notmuch_status_t st = notmuch_database_load_config(argv[1], NULL, NULL, &db, NULL);
 EOF
-NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
 cat <<EOF> EXPECTED
 == stdout ==
 db == NULL: 0