1 files changed, 83 insertions, 0 deletions
diff --git a/test/std/strings/basic.string/string.modifiers/string_append/string_view.pass.cpp b/test/std/strings/basic.string/string.modifiers/string_append/string_view.pass.cpp
new file mode 100644
index 000000000000..2d85b15fa373
--- /dev/null
+++ b/test/std/strings/basic.string/string.modifiers/string_append/string_view.pass.cpp
@@ -0,0 +1,83 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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>
+
+// basic_string<charT,traits,Allocator>&
+//   append(basic_string_view<charT,traits> sv);
+
+#include <string>
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+#include "min_allocator.h"
+
+template <class S, class SV>
+void
+test(S s, SV sv, S expected)
+{
+    s.append(sv);
+    LIBCPP_ASSERT(s.__invariants());
+    assert(s == expected);
+}
+
+int main()
+{
+    {
+    typedef std::string S;
+    typedef std::string_view SV;
+    test(S(), SV(), S());
+    test(S(), SV("12345"), S("12345"));
+    test(S(), SV("1234567890"), S("1234567890"));
+    test(S(), SV("12345678901234567890"), S("12345678901234567890"));
+
+    test(S("12345"), SV(), S("12345"));
+    test(S("12345"), SV("12345"), S("1234512345"));
+    test(S("12345"), SV("1234567890"), S("123451234567890"));
+    test(S("12345"), SV("12345678901234567890"), S("1234512345678901234567890"));
+
+    test(S("1234567890"), SV(), S("1234567890"));
+    test(S("1234567890"), SV("12345"), S("123456789012345"));
+    test(S("1234567890"), SV("1234567890"), S("12345678901234567890"));
+    test(S("1234567890"), SV("12345678901234567890"), S("123456789012345678901234567890"));
+
+    test(S("12345678901234567890"), SV(), S("12345678901234567890"));
+    test(S("12345678901234567890"), SV("12345"), S("1234567890123456789012345"));
+    test(S("12345678901234567890"), SV("1234567890"), S("123456789012345678901234567890"));
+    test(S("12345678901234567890"), SV("12345678901234567890"),
+         S("1234567890123456789012345678901234567890"));
+    }
+#if TEST_STD_VER >= 11
+    {
+    typedef std::basic_string     <char, std::char_traits<char>, min_allocator<char>> S;
+    typedef std::basic_string_view<char, std::char_traits<char> > SV;
+    test(S(), SV(), S());
+    test(S(), SV("12345"), S("12345"));
+    test(S(), SV("1234567890"), S("1234567890"));
+    test(S(), SV("12345678901234567890"), S("12345678901234567890"));
+
+    test(S("12345"), SV(), S("12345"));
+    test(S("12345"), SV("12345"), S("1234512345"));
+    test(S("12345"), SV("1234567890"), S("123451234567890"));
+    test(S("12345"), SV("12345678901234567890"), S("1234512345678901234567890"));
+
+    test(S("1234567890"), SV(), S("1234567890"));
+    test(S("1234567890"), SV("12345"), S("123456789012345"));
+    test(S("1234567890"), SV("1234567890"), S("12345678901234567890"));
+    test(S("1234567890"), SV("12345678901234567890"), S("123456789012345678901234567890"));
+
+    test(S("12345678901234567890"), SV(), S("12345678901234567890"));
+    test(S("12345678901234567890"), SV("12345"), S("1234567890123456789012345"));
+    test(S("12345678901234567890"), SV("1234567890"), S("123456789012345678901234567890"));
+    test(S("12345678901234567890"), SV("12345678901234567890"),
+         S("1234567890123456789012345678901234567890"));
+    }
+#endif
+}