Move native_handle thread tests to test/libcxx

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@273341 91177308-0d34-0410-b5e6-96231b3b80d8

test/libcxx/thread/thread.condition/thread.condition.condvar/native_handle.pass.cpp

@@ -0,0 +1,29 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: libcpp-has-no-threads
+
+// <condition_variable>
+
+// class condition_variable;
+
+// typedef pthread_cond_t* native_handle_type;
+// native_handle_type native_handle();
+
+#include <condition_variable>
+#include <cassert>
+
+int main()
+{
+    static_assert((std::is_same<std::condition_variable::native_handle_type,
+                                pthread_cond_t*>::value), "");
+    std::condition_variable cv;
+    std::condition_variable::native_handle_type h = cv.native_handle();
+    assert(h != nullptr);
+}