libc/test/src/stdio/printf_test.cpp

   1 //===-- Unittests for printf ---------------------------------------------===//
   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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/stdio/printf.h"
  10
  11 #include "test/UnitTest/Test.h"
  12
  13 TEST(LlvmLibcPrintfTest, PrintOut) {
  14   int written;
  15
  16   constexpr char simple[] = "A simple string with no conversions.\n";
  17   written = LIBC_NAMESPACE::printf(simple);
  18   EXPECT_EQ(written, static_cast<int>(sizeof(simple) - 1));
  19
  20   constexpr char numbers[] = "1234567890\n";
  21   written = LIBC_NAMESPACE::printf("%s", numbers);
  22   EXPECT_EQ(written, static_cast<int>(sizeof(numbers) - 1));
  23
  24   constexpr char format_more[] = "%s and more\n";
  25   constexpr char short_numbers[] = "1234";
  26   written = LIBC_NAMESPACE::printf(format_more, short_numbers);
  27   EXPECT_EQ(written,
  28             static_cast<int>(sizeof(format_more) + sizeof(short_numbers) - 4));
  29 }