[groff] 04/05: Add regression test for Savannah #59923.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit ca761ed69ad67190ae9dab499aca2bbdabd9c660
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sun May 2 17:13:14 2021 +1000

    Add regression test for Savannah #59923.
    
    * tmac/tests/s_PN-works.sh: Do it.
    * tmac/tmac.am (tmac_TESTS): Run test.
    
    Test fails at this commit.
---
 ChangeLog                |  7 +++++++
 tmac/tests/s_PN-works.sh | 37 +++++++++++++++++++++++++++++++++++++
 tmac/tmac.am             |  1 +
 3 files changed, 45 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 5ea6cfe..e143714 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2021-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       Add regression test for Savannah #59923.
+
+       * tmac/tests/s_PN-works.sh: Test it.
+       * tmac/tmac.am (tmac_TESTS): Run test.
+
 2021-05-01  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        Restore default IP paragraph indentation after an SH call.
diff --git a/tmac/tests/s_PN-works.sh b/tmac/tests/s_PN-works.sh
new file mode 100755
index 0000000..623fe9d
--- /dev/null
+++ b/tmac/tests/s_PN-works.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+#
+# Copyright (C) 2021 Free Software Foundation, Inc.
+#
+# This file is part of groff.
+#
+# groff is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# groff is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+groff="${abs_top_builddir:-.}/test-groff"
+
+# Regression-test Savannah #59923.
+#
+# Ensure retention of superfluous but fossilized register PN.
+
+EXAMPLE=\
+'.bp 2
+.LP
+This is page \\n[PN].
+'
+
+echo "$EXAMPLE" \
+    | "$groff" -Tascii -P-cbou -ms \
+    | grep -Fqx 'This is page 2.'
+
+# vim:set ai et sw=4 ts=4 tw=72:
diff --git a/tmac/tmac.am b/tmac/tmac.am
index 595b1c9..f3cfa61 100644
--- a/tmac/tmac.am
+++ b/tmac/tmac.am
@@ -182,6 +182,7 @@ tmac_TESTS = \
   tmac/tests/doc-smoke-test.sh \
   tmac/tests/doc_Mt-works.sh \
   tmac/tests/s_IP_respects_inter-sentence_space_in_tags.sh \
+  tmac/tests/s_PN-works.sh \
   tmac/tests/s_R-handles-its-arguments.sh \
   tmac/tests/s_SH_resets_IP_indentation_amount.sh \
   tmac/tests/s_TC-works-with-percent-in-custom-titles.sh