1 files changed, 37 insertions, 0 deletions
diff --git a/testsuite/unbuffered.sh b/testsuite/unbuffered.sh
new file mode 100644
index 0000000..b1a4c1b
--- /dev/null
+++ b/testsuite/unbuffered.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+# Test -u/--unbuffered option
+
+# Copyright (C) 2016 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/>.
+. "${srcdir=.}/testsuite/init.sh"; path_prepend_ ./sed
+print_ver_ sed
+
+printf "1\n2\n" > in1 || framework_failure_
+
+# expected output for both programs
+printf "1\n" >> exp || framework_failure_
+
+
+# in unbuffered mode,
+# sed should consume and print the first line,
+# wc should see the rest of the input (second line).
+# The second sed trims optional leading whitespace.
+( sed -u 1q > out-sed ; wc -l | sed 's/^  *//' > out-wc ) < in1
+
+compare_ exp out-sed || fail=1
+compare_ exp out-wc || fail=1
+
+
+Exit $fail