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//===-- Unittests for wctomb ----------------------------------------------===//
//
// 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 "hdr/errno_macros.h"
#include "hdr/types/wchar_t.h"
#include "src/stdlib/wctomb.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/Test.h"
using LlvmLibcWCToMBTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
TEST(LlvmLibcWCToMBTest, OneByte) {
wchar_t wc = L'U';
char mb[4];
int cnt = LIBC_NAMESPACE::wctomb(mb, wc);
ASSERT_EQ(cnt, 1);
ASSERT_EQ(mb[0], 'U');
}
TEST(LlvmLibcWCToMBTest, TwoByte) {
// testing utf32: 0xff -> utf8: 0xc3 0xbf
wchar_t wc = 0xff;
char mb[4];
int cnt = LIBC_NAMESPACE::wctomb(mb, wc);
ASSERT_EQ(cnt, 2);
ASSERT_EQ(mb[0], static_cast<char>(0xc3));
ASSERT_EQ(mb[1], static_cast<char>(0xbf));
}
TEST(LlvmLibcWCToMBTest, ThreeByte) {
// testing utf32: 0xac15 -> utf8: 0xea 0xb0 0x95
wchar_t wc = 0xac15;
char mb[4];
int cnt = LIBC_NAMESPACE::wctomb(mb, wc);
ASSERT_EQ(cnt, 3);
ASSERT_EQ(mb[0], static_cast<char>(0xea));
ASSERT_EQ(mb[1], static_cast<char>(0xb0));
ASSERT_EQ(mb[2], static_cast<char>(0x95));
}
TEST(LlvmLibcWCToMBTest, FourByte) {
// testing utf32: 0x1f921 -> utf8: 0xf0 0x9f 0xa4 0xa1
wchar_t wc = 0x1f921;
char mb[4];
int cnt = LIBC_NAMESPACE::wctomb(mb, wc);
ASSERT_EQ(cnt, 4);
ASSERT_EQ(mb[0], static_cast<char>(0xf0));
ASSERT_EQ(mb[1], static_cast<char>(0x9f));
ASSERT_EQ(mb[2], static_cast<char>(0xa4));
ASSERT_EQ(mb[3], static_cast<char>(0xa1));
}
TEST(LlvmLibcWCToMBTest, NullString) {
wchar_t wc = L'A';
int cnt = LIBC_NAMESPACE::wctomb(nullptr, wc);
// no state-dependent encoding
ASSERT_EQ(cnt, 0);
}
TEST(LlvmLibcWCToMBTest, InvalidWchar) {
wchar_t wc = 0x12ffff;
char mb[4];
int cnt = LIBC_NAMESPACE::wctomb(mb, wc);
ASSERT_EQ(cnt, -1);
ASSERT_ERRNO_EQ(EILSEQ);
}
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