96 lines
3.0 KiB
C++
96 lines
3.0 KiB
C++
//===-- Unittests for vfprintf --------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// These tests are copies of the non-v variants of the printf functions. This is
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// because these functions are identical in every way except for how the varargs
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// are passed.
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#ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE
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#include "src/stdio/fclose.h"
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#include "src/stdio/ferror.h"
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#include "src/stdio/fopen.h"
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#include "src/stdio/fread.h"
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#endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE
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#include "src/stdio/vfprintf.h"
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#include "test/UnitTest/Test.h"
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namespace printf_test {
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#ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE
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using LIBC_NAMESPACE::fclose;
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using LIBC_NAMESPACE::ferror;
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using LIBC_NAMESPACE::fopen;
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using LIBC_NAMESPACE::fread;
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#else // defined(LIBC_COPT_STDIO_USE_SYSTEM_FILE)
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using ::fclose;
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using ::ferror;
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using ::fopen;
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using ::fread;
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#endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE
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} // namespace printf_test
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int call_vfprintf(::FILE *__restrict stream, const char *__restrict format,
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...) {
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va_list vlist;
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va_start(vlist, format);
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int ret = LIBC_NAMESPACE::vfprintf(stream, format, vlist);
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va_end(vlist);
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return ret;
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}
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TEST(LlvmLibcVFPrintfTest, WriteToFile) {
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const char *FILENAME = "vfprintf_output.test";
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auto FILE_PATH = libc_make_test_file_path(FILENAME);
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::FILE *file = printf_test::fopen(FILE_PATH, "w");
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ASSERT_FALSE(file == nullptr);
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int written;
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constexpr char simple[] = "A simple string with no conversions.\n";
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written = call_vfprintf(file, simple);
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EXPECT_EQ(written, 37);
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constexpr char numbers[] = "1234567890\n";
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written = call_vfprintf(file, "%s", numbers);
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EXPECT_EQ(written, 11);
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constexpr char format_more[] = "%s and more\n";
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constexpr char short_numbers[] = "1234";
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written = call_vfprintf(file, format_more, short_numbers);
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EXPECT_EQ(written, 14);
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ASSERT_EQ(0, printf_test::fclose(file));
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file = printf_test::fopen(FILE_PATH, "r");
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ASSERT_FALSE(file == nullptr);
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char data[50];
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ASSERT_EQ(printf_test::fread(data, 1, sizeof(simple) - 1, file),
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sizeof(simple) - 1);
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data[sizeof(simple) - 1] = '\0';
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ASSERT_STREQ(data, simple);
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ASSERT_EQ(printf_test::fread(data, 1, sizeof(numbers) - 1, file),
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sizeof(numbers) - 1);
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data[sizeof(numbers) - 1] = '\0';
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ASSERT_STREQ(data, numbers);
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ASSERT_EQ(printf_test::fread(
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data, 1, sizeof(format_more) + sizeof(short_numbers) - 4, file),
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sizeof(format_more) + sizeof(short_numbers) - 4);
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data[sizeof(format_more) + sizeof(short_numbers) - 4] = '\0';
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ASSERT_STREQ(data, "1234 and more\n");
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ASSERT_EQ(printf_test::ferror(file), 0);
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written = call_vfprintf(file, "Writing to a read only file should fail.");
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EXPECT_LT(written, 0);
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ASSERT_EQ(printf_test::fclose(file), 0);
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}
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