1 files changed, 89 insertions, 0 deletions
diff --git a/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp b/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp
new file mode 100644
index 0000000000000..d36c278862954
--- /dev/null
+++ b/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp
@@ -0,0 +1,89 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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>
+
+// [string.view.capacity], capacity
+// constexpr size_type size()     const noexcept;
+// constexpr size_type length()   const noexcept;
+// constexpr size_type max_size() const noexcept;
+// constexpr bool empty()         const noexcept;
+
+#include <string_view>
+#include <cassert>
+
+#include "test_macros.h"
+
+template<typename SV>
+void test1 () {
+#if TEST_STD_VER > 11
+    {
+    constexpr SV sv1;
+    static_assert ( sv1.size() == 0, "" );
+    static_assert ( sv1.empty(), "");
+    static_assert ( sv1.size() == sv1.length(), "" );
+    static_assert ( sv1.max_size() > sv1.size(), "");
+    }
+#endif
+
+    {
+    SV sv1;
+    assert ( sv1.size() == 0 );
+    assert ( sv1.empty());
+    assert ( sv1.size() == sv1.length());
+    assert ( sv1.max_size() > sv1.size());
+    }
+}
+
+template<typename CharT>
+void test2 ( const CharT *s, size_t len ) {
+    {
+    std::basic_string_view<CharT> sv1 ( s );
+    assert ( sv1.size() == len );
+    assert ( sv1.data() == s );
+    assert ( sv1.empty() == (len == 0));
+    assert ( sv1.size() == sv1.length());
+    assert ( sv1.max_size() > sv1.size());
+    }
+}
+
+int main () {
+    typedef std::string_view    string_view;
+    typedef std::u16string_view u16string_view;
+    typedef std::u32string_view u32string_view;
+    typedef std::wstring_view   wstring_view;
+
+    test1<string_view> ();
+    test1<u16string_view> ();
+    test1<u32string_view> ();
+    test1<wstring_view> ();
+
+    test2 ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( "ABCDE", 5 );
+    test2 ( "a", 1 );
+    test2 ( "", 0 );
+
+    test2 ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( L"ABCDE", 5 );
+    test2 ( L"a", 1 );
+    test2 ( L"", 0 );
+
+#if TEST_STD_VER >= 11
+    test2 ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( u"ABCDE", 5 );
+    test2 ( u"a", 1 );
+    test2 ( u"", 0 );
+
+    test2 ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
+    test2 ( U"ABCDE", 5 );
+    test2 ( U"a", 1 );
+    test2 ( U"", 0 );
+#endif
+}