test: add known broken test for null from: and subject: query

These queries currently fail with field processors enabled because the
code expects a non-empty string.

diff --git a/test/T650-regexp-query.sh b/test/T650-regexp-query.sh
index 61739e873eb214364f0f3b60748fa30279580787..f2ae1387eea086c9bcb1b3227a8d702b8bd81767 100755 (executable)
--- a/test/T650-regexp-query.sh
+++ b/test/T650-regexp-query.sh
@@ -11,6 +11,26 @@ fi
 
 notmuch search --output=messages from:cworth > cworth.msg-ids
 
+# these headers will generate no document terms
+add_message '[from]="-" [subject]="empty from"'
+add_message '[subject]="-"'
+
+test_begin_subtest "null from: search"
+test_subtest_known_broken
+notmuch search 'from:""' | notmuch_search_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+thread:XXX   2001-01-05 [1/1] -; empty from (inbox unread)
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "null subject: search"
+test_subtest_known_broken
+notmuch search 'subject:""' | notmuch_search_sanitize > OUTPUT
+cat <<EOF > EXPECTED
+thread:XXX   2001-01-05 [1/1] Notmuch Test Suite; - (inbox unread)
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
 test_begin_subtest "xapian wildcard search for from:"
 notmuch search --output=messages 'from:cwo*' > OUTPUT
 test_expect_equal_file cworth.msg-ids OUTPUT