[libc-commits] [libc] [libc] Add iswctype and wctype (PR #191178)

[Michael Jones via libc-commits]

================
@@ -0,0 +1,110 @@
+//===-- Unittests for iswctype --------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/wctype/iswctype.h"
+
+#include "test/UnitTest/Test.h"
+
+// Simple tests, already properly tested in
+// libc/test/src/__support/wctype_utils_test.cpp
+
+static constexpr wctype_t WCTYPE_INVALID = static_cast<wctype_t>(0);
+static constexpr wctype_t WCTYPE_ALNUM = static_cast<wctype_t>(1);
+static constexpr wctype_t WCTYPE_ALPHA = static_cast<wctype_t>(2);
+static constexpr wctype_t WCTYPE_BLANK = static_cast<wctype_t>(3);
+static constexpr wctype_t WCTYPE_CNTRL = static_cast<wctype_t>(4);
+static constexpr wctype_t WCTYPE_DIGIT = static_cast<wctype_t>(5);
+static constexpr wctype_t WCTYPE_GRAPH = static_cast<wctype_t>(6);
+static constexpr wctype_t WCTYPE_LOWER = static_cast<wctype_t>(7);
+static constexpr wctype_t WCTYPE_PRINT = static_cast<wctype_t>(8);
+static constexpr wctype_t WCTYPE_PUNCT = static_cast<wctype_t>(9);
+static constexpr wctype_t WCTYPE_SPACE = static_cast<wctype_t>(10);
+static constexpr wctype_t WCTYPE_UPPER = static_cast<wctype_t>(11);
+static constexpr wctype_t WCTYPE_XDIGIT = static_cast<wctype_t>(12);
+
+TEST(LlvmLibciswctype, SimpleTest) {
+  using LIBC_NAMESPACE::iswctype;
----------------
michaelrj-google wrote:

Don't use a `using` statement here. We want to explicitly call the libc function with the namespace so that we know our test is using our implementation and not a copy from another libc on the system. It makes the tests a little longer but is important for hermeticity.

https://github.com/llvm/llvm-project/pull/191178