1 files changed, 62 insertions, 0 deletions
diff --git a/test/std/strings/string.view/string.view.comparison/opne.string_view.string_view.pass.cpp b/test/std/strings/string.view/string.view.comparison/opne.string_view.string_view.pass.cpp
new file mode 100644
index 000000000000..63a3000f9360
--- /dev/null
+++ b/test/std/strings/string.view/string.view.comparison/opne.string_view.string_view.pass.cpp
@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string_view>
+
+// template<class charT, class traits, class Allocator>
+//   constexpr bool operator!=(const basic_string_view<charT,traits> lhs,
+//                   const basic_string_view<charT,traits> rhs);
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "constexpr_char_traits.hpp"
+
+template <class S>
+void
+test(S lhs, S rhs, bool x)
+{
+    assert((lhs != rhs) == x);
+    assert((rhs != lhs) == x);
+}
+
+int main()
+{
+    {
+    typedef std::string_view S;
+    test(S(""), S(""), false);
+    test(S(""), S("abcde"), true);
+    test(S(""), S("abcdefghij"), true);
+    test(S(""), S("abcdefghijklmnopqrst"), true);
+    test(S("abcde"), S(""), true);
+    test(S("abcde"), S("abcde"), false);
+    test(S("abcde"), S("abcdefghij"), true);
+    test(S("abcde"), S("abcdefghijklmnopqrst"), true);
+    test(S("abcdefghij"), S(""), true);
+    test(S("abcdefghij"), S("abcde"), true);
+    test(S("abcdefghij"), S("abcdefghij"), false);
+    test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true);
+    test(S("abcdefghijklmnopqrst"), S(""), true);
+    test(S("abcdefghijklmnopqrst"), S("abcde"), true);
+    test(S("abcdefghijklmnopqrst"), S("abcdefghij"), true);
+    test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), false);
+    }
+
+#if TEST_STD_VER > 11
+    {
+    typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
+    constexpr SV  sv1;
+    constexpr SV  sv2;
+    constexpr SV  sv3 { "abcde", 5 };
+    static_assert (!( sv1 != sv2), "" );
+    static_assert (   sv1 != sv3,  "" );
+    }
+#endif
+}