libc/test/src/stdio/vsprintf_test.cpp

   1 //===-- Unittests for vsprintf --------------------------------------------===//
   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 // These tests are shortened copies of the non-v variants of the printf
  10 // functions. This is because these functions are identical in every way except
  11 // for how the varargs are passed.
  12
  13 #include "src/stdio/vsprintf.h"
  14
  15 #include "test/UnitTest/Test.h"
  16
  17 int call_vsprintf(char *__restrict buffer, const char *__restrict format, ...) {
  18   va_list vlist;
  19   va_start(vlist, format);
  20   int ret = LIBC_NAMESPACE::vsprintf(buffer, format, vlist);
  21   va_end(vlist);
  22   return ret;
  23 }
  24
  25 TEST(LlvmLibcVSPrintfTest, SimpleNoConv) {
  26   char buff[64];
  27   int written;
  28
  29   written = call_vsprintf(buff, "A simple string with no conversions.");
  30   EXPECT_EQ(written, 36);
  31   ASSERT_STREQ(buff, "A simple string with no conversions.");
  32 }
  33
  34 TEST(LlvmLibcVSPrintfTest, PercentConv) {
  35   char buff[64];
  36   int written;
  37
  38   written = call_vsprintf(buff, "%%");
  39   EXPECT_EQ(written, 1);
  40   ASSERT_STREQ(buff, "%");
  41
  42   written = call_vsprintf(buff, "abc %% def");
  43   EXPECT_EQ(written, 9);
  44   ASSERT_STREQ(buff, "abc % def");
  45
  46   written = call_vsprintf(buff, "%%%%%%");
  47   EXPECT_EQ(written, 3);
  48   ASSERT_STREQ(buff, "%%%");
  49 }
  50
  51 TEST(LlvmLibcVSPrintfTest, CharConv) {
  52   char buff[64];
  53   int written;
  54
  55   written = call_vsprintf(buff, "%c", 'a');
  56   EXPECT_EQ(written, 1);
  57   ASSERT_STREQ(buff, "a");
  58
  59   written = call_vsprintf(buff, "%3c %-3c", '1', '2');
  60   EXPECT_EQ(written, 7);
  61   ASSERT_STREQ(buff, "  1 2  ");
  62
  63   written = call_vsprintf(buff, "%*c", 2, '3');
  64   EXPECT_EQ(written, 2);
  65   ASSERT_STREQ(buff, " 3");
  66 }