Unit test for abort(3).

Change-Id: I021604b977572801f228a193741624df26e76d72
diff --git a/tests/unistd_test.cpp b/tests/unistd_test.cpp
index 8195ea8..21c14f4 100644
--- a/tests/unistd_test.cpp
+++ b/tests/unistd_test.cpp
@@ -462,3 +462,8 @@
   ASSERT_EQ(0, pthread_join(t, &result));
   ASSERT_EQ(NULL, result);
 }
+
+TEST(unistd_DeathTest, abort) {
+  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
+  ASSERT_EXIT(abort(), testing::KilledBySignal(SIGABRT), "");
+}