42 lines · cpp
1//===-- Unittests for vprintf --------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// These tests are copies of the non-v variants of the printf functions. This is10// because these functions are identical in every way except for how the varargs11// are passed.12 13#include "src/stdio/vprintf.h"14 15#include "test/UnitTest/Test.h"16 17int call_vprintf(const char *__restrict format, ...) {18 va_list vlist;19 va_start(vlist, format);20 int ret = LIBC_NAMESPACE::vprintf(format, vlist);21 va_end(vlist);22 return ret;23}24 25TEST(LlvmLibcVPrintfTest, PrintOut) {26 int written;27 28 constexpr char simple[] = "A simple string with no conversions.\n";29 written = call_vprintf(simple);30 EXPECT_EQ(written, static_cast<int>(sizeof(simple) - 1));31 32 constexpr char numbers[] = "1234567890\n";33 written = call_vprintf("%s", numbers);34 EXPECT_EQ(written, static_cast<int>(sizeof(numbers) - 1));35 36 constexpr char format_more[] = "%s and more\n";37 constexpr char short_numbers[] = "1234";38 written = call_vprintf(format_more, short_numbers);39 EXPECT_EQ(written,40 static_cast<int>(sizeof(format_more) + sizeof(short_numbers) - 4));41}42