test: change database from within pre-new hook

Due to the change in the config system, notmuch keeps a notmuch database
open when it would not do so before. Consequently, it can miss changes
to the database which are done from a hook (while notmuch holds the
databse in read only mode). When notmuch itself writes to the database
after that it uses wrong assumptions about the last used doc id etc.

Demonstrate this by triggering an assertion. (This new test succeeds
with notmuch 0.31.4.)

Signed-off-by: Michael J Gruber <git@grubix.eu>
Amended-by: db. Check for both messages

test/T400-hooks.sh

@@ -28,6 +28,16 @@ EOF
     echo "${TOKEN}" > ${2}
 }
 
+create_change_hook () {
+    mkdir -p ${HOOK_DIR}
+    cat <<EOF >"${HOOK_DIR}/${1}"
+#!/bin/sh
+notmuch insert --no-hooks < ${2} > /dev/null
+rm -f ${2}
+EOF
+    chmod +x "${HOOK_DIR}/${1}"
+}
+
 create_failing_hook () {
     local HOOK_DIR=${2}
     mkdir -p ${HOOK_DIR}
@@ -176,6 +186,21 @@ EOF
     NOTMUCH_NEW
     test_expect_equal_file write.expected write.output
 
+    test_begin_subtest "add message in pre-new [${config}]"
+    test_subtest_known_broken
+    rm -rf ${HOOK_DIR}
+    generate_message '[subject]="add msg in pre-new"'
+    id1=$gen_msg_id
+    create_change_hook "pre-new" $gen_msg_filename $HOOK_DIR
+    generate_message '[subject]="add msg in new"'
+    NOTMUCH_NEW
+    notmuch search id:$id1 or id:$gen_msg_id | notmuch_search_sanitize > OUTPUT
+    cat <<EOF | sed s'/^[ \t]*//' > EXPECTED
+    thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; add msg in pre-new (inbox unread)
+    thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; add msg in new (inbox unread)
+EOF
+    test_expect_equal_file EXPECTED OUTPUT
+
     rm -rf ${HOOK_DIR}
 done
 test_done