Move test into test/std subdirectory.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/input.output/iostreams.base/std.ios.manip/floatfield.manip/hexfloat.pass.cpp

@@ -0,0 +1,30 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <ios>
+
+// class ios_base
+
+// ios_base& hexfloat(ios_base& str);
+
+#include <ios>
+#include <streambuf>
+#include <cassert>
+
+struct testbuf : public std::streambuf {};
+
+int main()
+{
+    testbuf sb;
+    std::ios ios(&sb);
+    std::ios_base& r = std::hexfloat(ios);
+    assert(&r == &ios);
+    assert(ios.flags() & std::ios::fixed);
+    assert(ios.flags() & std::ios::scientific);
+}