1 files changed, 31 insertions, 0 deletions
diff --git a/test/std/localization/locales/locale.convenience/classification/islower.pass.cpp b/test/std/localization/locales/locale.convenience/classification/islower.pass.cpp
new file mode 100644
index 0000000000000..e131e50b37dcb
--- /dev/null
+++ b/test/std/localization/locales/locale.convenience/classification/islower.pass.cpp
@@ -0,0 +1,31 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <locale>
+
+// template <class charT> bool islower (charT c, const locale& loc);
+
+#include <locale>
+#include <cassert>
+
+int main()
+{
+    std::locale l;
+    assert(!std::islower(' ', l));
+    assert(!std::islower('<', l));
+    assert(!std::islower('\x8', l));
+    assert(!std::islower('A', l));
+    assert( std::islower('a', l));
+    assert( std::islower('z', l));
+    assert(!std::islower('3', l));
+    assert(!std::islower('.', l));
+    assert( std::islower('f', l));
+    assert(!std::islower('9', l));
+    assert(!std::islower('+', l));
+}