Add TUI resizing test

This adds a test case that resizes the terminal and then checks that
the TUI updates properly.

gdb/testsuite/ChangeLog
2019-07-27  Tom Tromey  <tom@tromey.com>

	* lib/tuiterm.exp (spawn): New proc.
	(Term::resize): New proc.
	* gdb.tui/resize.exp: New file.

1 files changed, 42 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.tui/resize.exp b/gdb/testsuite/gdb.tui/resize.exp
new file mode 100644
index 0000000..8484e03
--- /dev/null
+++ b/gdb/testsuite/gdb.tui/resize.exp
@@ -0,0 +1,42 @@
+# Copyright 2019 Free Software Foundation, Inc.
+
+# This program 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.
+#
+# This program 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/>.
+
+# Test TUI resizing.
+
+load_lib "tuiterm.exp"
+
+standard_testfile tui-layout.c
+
+if {[build_executable "failed to prepare" ${testfile} ${srcfile}] == -1} {
+    return -1
+}
+
+Term::clean_restart 24 80 $testfile
+
+if {![runto_main]} {
+    perror "test suppressed"
+    return
+}
+
+if {![Term::enter_tui]} {
+    unsupported "TUI not supported"
+}
+
+Term::check_contents "source at startup" ">|21 *return 0"
+
+Term::resize 40 90
+# Resizing seems to be somewhat broken.
+setup_xfail *-*-*
+Term::check_box "source box after resize" 0 0 90 23