test: add test for hiding Original Message region at beginning of a message

The test is currently broken and will be fixed by a subsequent patch.

The patch adds a new file for tests of Emacs notmuch-show view.

Based on patch by David Edmondson [1].

[1] id:"1327562380-12894-4-git-send-email-dme@dme.org"

test/emacs-show

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+test_description="Testing emacs notmuch-show view"
+. test-lib.sh
+
+test_begin_subtest "Hiding Original Message region at beginning of a message"
+test_subtest_known_broken
+message_id='OriginalMessageHiding.1@notmuchmail.org'
+add_message \
+    [id]="$message_id" \
+    '[subject]="Hiding Original Message region at beginning of a message"' \
+    '[body]="-----Original Message-----
+Text here."'
+
+cat <<EOF >EXPECTED
+Notmuch Test Suite <test_suite@notmuchmail.org> (2001-01-05) (inbox)
+Subject: Hiding Original Message region at beginning of a message
+To: Notmuch Test Suite <test_suite@notmuchmail.org>
+Date: Fri, 05 Jan 2001 15:43:57 +0000
+
+[ 2-line hidden original message. Click/Enter to show. ]
+EOF
+
+test_emacs "(notmuch-show \"id:$message_id\")
+	    (test-visible-output)"
+test_expect_equal_file OUTPUT EXPECTED
+
+test_done

test/notmuch-test

@@ -54,6 +54,7 @@ TESTS="
   argument-parsing
   emacs-test-functions
   emacs-address-cleaning
+  emacs-show
 "
 TESTS=${NOTMUCH_TESTS:=$TESTS}