test: add known broken tests for duplicate message id

There are many other problems that could be tested, but these ones we
have some hope of fixing because it doesn't require UI changes, just
indexing changes.

diff --git a/test/T670-duplicate-mid.sh b/test/T670-duplicate-mid.sh
new file mode 100755 (executable)
index 0000000..ced28a2
--- /dev/null
+++ b/test/T670-duplicate-mid.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+test_description="duplicate message ids"
+. ./test-lib.sh || exit 1
+
+add_message '[id]="duplicate"' '[subject]="message 1" [filename]=copy1'
+add_message '[id]="duplicate"' '[subject]="message 2" [filename]=copy2'
+
+test_begin_subtest 'Search for second subject'
+test_subtest_known_broken
+cat <<EOF >EXPECTED
+MAIL_DIR/copy1
+MAIL_DIR/copy2
+EOF
+notmuch search --output=files subject:'"message 2"' | notmuch_dir_sanitize > OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+add_message '[id]="duplicate"' '[body]="sekrit" [filename]=copy3'
+test_begin_subtest 'search for body in duplicate file'
+test_subtest_known_broken
+cat <<EOF >EXPECTED
+MAIL_DIR/copy1
+MAIL_DIR/copy2
+MAIL_DIR/copy3
+EOF
+notmuch search --output=files "sekrit" | notmuch_dir_sanitize > OUTPUT
+test_expect_equal_file EXPECTED OUTPUT
+
+test_done