[PATCH v2 1/8] tests: factor out terminal handling from t7006

[Tay Ray Chuan <rctay89@gmail.com>]

From: Jeff King <peff@peff.net>

Other tests besides the pager ones may want to check how we handle
output to a terminal. This patch makes the code reusable.

Signed-off-by: Jeff King <peff@peff.net>
---

  No change.

 t/lib-terminal.sh          |   28 +++++++++++++++++++++
 t/t7006-pager.sh           |   31 +----------------------
 t/t7006/test-terminal.perl |   58 --------------------------------------------
 t/test-terminal.perl       |   58 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 87 insertions(+), 88 deletions(-)
 create mode 100644 t/lib-terminal.sh
 delete mode 100755 t/t7006/test-terminal.perl
 create mode 100755 t/test-terminal.perl

diff --git a/t/lib-terminal.sh b/t/lib-terminal.sh
new file mode 100644
index 0000000..6fc33db
--- /dev/null
+++ b/t/lib-terminal.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+test_expect_success 'set up terminal for tests' '
+	if test -t 1
+	then
+		>stdout_is_tty
+	elif
+		test_have_prereq PERL &&
+		"$PERL_PATH" "$TEST_DIRECTORY"/test-terminal.perl \
+			sh -c "test -t 1"
+	then
+		>test_terminal_works
+	fi
+'
+
+if test -e stdout_is_tty
+then
+	test_terminal() { "$@"; }
+	test_set_prereq TTY
+elif test -e test_terminal_works
+then
+	test_terminal() {
+		"$PERL_PATH" "$TEST_DIRECTORY"/test-terminal.perl "$@"
+	}
+	test_set_prereq TTY
+else
+	say "# no usable terminal, so skipping some tests"
+fi
diff --git a/t/t7006-pager.sh b/t/t7006-pager.sh
index fb744e3..17e54d3 100755
--- a/t/t7006-pager.sh
+++ b/t/t7006-pager.sh
@@ -4,42 +4,13 @@ test_description='Test automatic use of a pager.'
 
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-pager.sh
+. "$TEST_DIRECTORY"/lib-terminal.sh
 
 cleanup_fail() {
 	echo >&2 cleanup failed
 	(exit 1)
 }
 
-test_expect_success 'set up terminal for tests' '
-	rm -f stdout_is_tty ||
-	cleanup_fail &&
-
-	if test -t 1
-	then
-		>stdout_is_tty
-	elif
-		test_have_prereq PERL &&
-		"$PERL_PATH" "$TEST_DIRECTORY"/t7006/test-terminal.perl \
-			sh -c "test -t 1"
-	then
-		>test_terminal_works
-	fi
-'
-
-if test -e stdout_is_tty
-then
-	test_terminal() { "$@"; }
-	test_set_prereq TTY
-elif test -e test_terminal_works
-then
-	test_terminal() {
-		"$PERL_PATH" "$TEST_DIRECTORY"/t7006/test-terminal.perl "$@"
-	}
-	test_set_prereq TTY
-else
-	say "# no usable terminal, so skipping some tests"
-fi
-
 test_expect_success 'setup' '
 	unset GIT_PAGER GIT_PAGER_IN_USE;
 	test_might_fail git config --unset core.pager &&
diff --git a/t/t7006/test-terminal.perl b/t/t7006/test-terminal.perl
deleted file mode 100755
index 73ff809..0000000
--- a/t/t7006/test-terminal.perl
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/perl
-use strict;
-use warnings;
-use IO::Pty;
-use File::Copy;
-
-# Run @$argv in the background with stdout redirected to $out.
-sub start_child {
-	my ($argv, $out) = @_;
-	my $pid = fork;
-	if (not defined $pid) {
-		die "fork failed: $!"
-	} elsif ($pid == 0) {
-		open STDOUT, ">&", $out;
-		close $out;
-		exec(@$argv) or die "cannot exec '$argv->[0]': $!"
-	}
-	return $pid;
-}
-
-# Wait for $pid to finish.
-sub finish_child {
-	# Simplified from wait_or_whine() in run-command.c.
-	my ($pid) = @_;
-
-	my $waiting = waitpid($pid, 0);
-	if ($waiting < 0) {
-		die "waitpid failed: $!";
-	} elsif ($? & 127) {
-		my $code = $? & 127;
-		warn "died of signal $code";
-		return $code - 128;
-	} else {
-		return $? >> 8;
-	}
-}
-
-sub xsendfile {
-	my ($out, $in) = @_;
-
-	# Note: the real sendfile() cannot read from a terminal.
-
-	# It is unspecified by POSIX whether reads
-	# from a disconnected terminal will return
-	# EIO (as in AIX 4.x, IRIX, and Linux) or
-	# end-of-file.  Either is fine.
-	copy($in, $out, 4096) or $!{EIO} or die "cannot copy from child: $!";
-}
-
-if ($#ARGV < 1) {
-	die "usage: test-terminal program args";
-}
-my $master = new IO::Pty;
-my $slave = $master->slave;
-my $pid = start_child(\@ARGV, $slave);
-close $slave;
-xsendfile(\*STDOUT, $master);
-exit(finish_child($pid));
diff --git a/t/test-terminal.perl b/t/test-terminal.perl
new file mode 100755
index 0000000..73ff809
--- /dev/null
+++ b/t/test-terminal.perl
@@ -0,0 +1,58 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+use IO::Pty;
+use File::Copy;
+
+# Run @$argv in the background with stdout redirected to $out.
+sub start_child {
+	my ($argv, $out) = @_;
+	my $pid = fork;
+	if (not defined $pid) {
+		die "fork failed: $!"
+	} elsif ($pid == 0) {
+		open STDOUT, ">&", $out;
+		close $out;
+		exec(@$argv) or die "cannot exec '$argv->[0]': $!"
+	}
+	return $pid;
+}
+
+# Wait for $pid to finish.
+sub finish_child {
+	# Simplified from wait_or_whine() in run-command.c.
+	my ($pid) = @_;
+
+	my $waiting = waitpid($pid, 0);
+	if ($waiting < 0) {
+		die "waitpid failed: $!";
+	} elsif ($? & 127) {
+		my $code = $? & 127;
+		warn "died of signal $code";
+		return $code - 128;
+	} else {
+		return $? >> 8;
+	}
+}
+
+sub xsendfile {
+	my ($out, $in) = @_;
+
+	# Note: the real sendfile() cannot read from a terminal.
+
+	# It is unspecified by POSIX whether reads
+	# from a disconnected terminal will return
+	# EIO (as in AIX 4.x, IRIX, and Linux) or
+	# end-of-file.  Either is fine.
+	copy($in, $out, 4096) or $!{EIO} or die "cannot copy from child: $!";
+}
+
+if ($#ARGV < 1) {
+	die "usage: test-terminal program args";
+}
+my $master = new IO::Pty;
+my $slave = $master->slave;
+my $pid = start_child(\@ARGV, $slave);
+close $slave;
+xsendfile(\*STDOUT, $master);
+exit(finish_child($pid));
-- 
1.7.2.2.513.ge1ef3