This documents the bug discussed at
id:87efgmmysi.fsf@len.workgroup
The underlying issue is that the reply to a ghost (missing) message is
falsely classified as a root message in _resolve_thread_relationships.
The first test is simpler / more robust, but also easier to fool.
---
test/T260-thread-order.sh | 27 +++++++++++++++++++++
test/corpora/threading/ghost-root/fake-root | 2 +-
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/test/T260-thread-order.sh b/test/T260-thread-order.sh
index fea61275..ce8636b9 100755
--- a/test/T260-thread-order.sh
+++ b/test/T260-thread-order.sh
@@ -75,4 +75,31 @@ $(for ((i = 0; i < $nthreads; i++)); do
done
test_expect_equal "$output" "$expected"
+add_email_corpus threading
+
+test_begin_subtest "reply to ghost"
+test_subtest_known_broken
+notmuch show --entire-thread=true id:000-real-root@example.org | grep ^Subject: | head -1 > OUTPUT
+cat <<EOF > EXPECTED
+Subject: root message
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "reply to ghost (tree view)"
+test_subtest_known_broken
+test_emacs '(notmuch-tree "tag:inbox")
+ (notmuch-test-wait)
+ (test-output)
+ (delete-other-windows)'
+cat <<EOF > EXPECTED
+ 2016-06-17 Alice ┬►root message (inbox unread)
+ 2016-06-18 Alice ╰┬►child message (inbox unread)
+ 2016-06-18 Alice ├┬►grand-child message (inbox unread)
+ 2016-06-18 Alice │╰─►great grand-child message (inbox unread)
+ 2016-06-18 Daniel ├─►grand-child message 2 (inbox unread)
+ 2016-06-17 Mallory ╰─►fake root message (inbox unread)
+End of search results.
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
test_done
diff --git a/test/corpora/threading/ghost-root/fake-root b/test/corpora/threading/ghost-root/fake-root
index 102bb228..5be228fd 100644
--- a/test/corpora/threading/ghost-root/fake-root
+++ b/test/corpora/threading/ghost-root/fake-root
@@ -6,4 +6,4 @@ In-Reply-to: <nonexistent-message@example.org>
References: <000-real-root@example.org> <001-child@example.org> <nonexistent-message@example.org>
Date: Thu, 16 Jun 2016 22:14:41 -0400
-This message has no reply-to
+This message has a reply-to to a non-existent message
--
2.18.0
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