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/numerics/rand/rand.eng/rand.eng.sub/copy.pass.cpp

@@ -0,0 +1,54 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <random>
+
+// template<class UIntType, size_t w, size_t s, size_t r>
+// class subtract_with_carry_engine;
+
+// subtract_with_carry_engine(const subtract_with_carry_engine&);
+
+#include <random>
+#include <cassert>
+
+void
+test1()
+{
+    typedef std::ranlux24_base E;
+    E e1;
+    e1();
+    E e2 = e1;
+    assert(e1 == e2);
+    assert(e1() == e2());
+    E::result_type k = e1();
+    assert(e1 != e2);
+    assert(e2() == k);
+    assert(e1 == e2);
+}
+
+void
+test2()
+{
+    typedef std::ranlux48_base E;
+    E e1;
+    e1();
+    E e2(e1);
+    assert(e1 == e2);
+    assert(e1() == e2());
+    E::result_type k = e1();
+    assert(e1 != e2);
+    assert(e2() == k);
+    assert(e1 == e2);
+}
+
+int main()
+{
+    test1();
+    test2();
+}