1 files changed, 75 insertions, 0 deletions
diff --git a/lib/dpkg/t/t-pager.c b/lib/dpkg/t/t-pager.c
new file mode 100644
index 0000000..2481e80
--- /dev/null
+++ b/lib/dpkg/t/t-pager.c
@@ -0,0 +1,75 @@
+/*
+ * libdpkg - Debian packaging suite library routines
+ * t-pager.c - test pager implementation
+ *
+ * Copyright © 2010-2012 Guillem Jover <guillem@debian.org>
+ *
+ * This 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <compat.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <dpkg/test.h>
+#include <dpkg/pager.h>
+#include <dpkg/dpkg.h>
+
+static void
+test_dup_file(int fd, const char *filename, int flags)
+{
+	int newfd;
+
+	newfd = open(filename, flags);
+	dup2(newfd, fd);
+	close(newfd);
+}
+
+static void
+test_pager_get_exec(void)
+{
+	const char *pager, *default_pager;
+	int origfd = dup(STDOUT_FILENO);
+
+	/* Test stdout being a tty. */
+	test_todo_block("environment might not expose controlling terminal") {
+		test_dup_file(STDOUT_FILENO, "/dev/tty", O_WRONLY);
+		setenv("PAGER", "test-pager", 1);
+		pager = pager_get_exec();
+		unsetenv("PAGER");
+		default_pager = pager_get_exec();
+		dup2(origfd, STDOUT_FILENO);
+		test_str(pager, ==, "test-pager");
+		test_str(default_pager, ==, DEFAULTPAGER);
+	}
+
+	/* Test stdout not being a tty. */
+	test_dup_file(STDOUT_FILENO, "/dev/null", O_WRONLY);
+	pager = pager_get_exec();
+	dup2(origfd, STDOUT_FILENO);
+	test_str(pager, ==, CAT);
+}
+
+TEST_ENTRY(test)
+{
+	test_plan(3);
+
+	test_pager_get_exec();
+}