A virtual terminal for the test suite

This patch implements a simple ANSI terminal emulator for the test
suite.  It is still quite basic, but it is good enough to allow some
simple TUI testing to be done.

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

	* lib/tuiterm.exp: New file.
	* gdb.tui/basic.exp: New file.

1 files changed, 41 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.tui/basic.exp b/gdb/testsuite/gdb.tui/basic.exp
new file mode 100644
index 0000000..61dcacb
--- /dev/null
+++ b/gdb/testsuite/gdb.tui/basic.exp
@@ -0,0 +1,41 @@
+# 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/>.
+
+# Basic TUI tests.
+
+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 {![Term::enter_tui]} {
+    unsupported "TUI not supported"
+}
+
+set text [Term::get_all_lines]
+gdb_assert {![string match "No Source Available" $text]} \
+    "initial source listing"
+
+Term::command "list main"
+Term::check_contents "list main" "21 *return 0"
+
+# This check fails because the file name in the title overwrites the
+# box.
+setup_xfail *-*-*
+Term::check_box "source box" 3 0 77 15