1 files changed, 42 insertions, 0 deletions

diff --git a/libcxx/test/diagnostics/std.exceptions/underflow.error/underflow_error.pass.cpp b/libcxx/test/diagnostics/std.exceptions/underflow.error/underflow_error.pass.cpp
new file mode 100644
index 00000000000..6d1183b609b
--- /dev/null
+++ b/libcxx/test/diagnostics/std.exceptions/underflow.error/underflow_error.pass.cpp
@@ -0,0 +1,42 @@
+//===----------------------------------------------------------------------===//
+//
+// ΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚΚThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// test underflow_error
+
+#include <stdexcept>
+#include <type_traits>
+#include <cstring>
+#include <string>
+#include <cassert>
+
+int main()
+{
+    static_assert((std::is_base_of<std::runtime_error, std::underflow_error>::value),
+                 "std::is_base_of<std::runtime_error, std::underflow_error>::value");
+    static_assert(std::is_polymorphic<std::underflow_error>::value,
+                 "std::is_polymorphic<std::underflow_error>::value");
+    {
+    const char* msg = "underflow_error message";
+    std::underflow_error e(msg);
+    assert(std::strcmp(e.what(), msg) == 0);
+    std::underflow_error e2(e);
+    assert(std::strcmp(e2.what(), msg) == 0);
+    e2 = e;
+    assert(std::strcmp(e2.what(), msg) == 0);
+    }
+    {
+    std::string msg("another underflow_error message");
+    std::underflow_error e(msg);
+    assert(e.what() == msg);
+    std::underflow_error e2(e);
+    assert(e2.what() == msg);
+    e2 = e;
+    assert(e2.what() == msg);
+    }
+}