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//===-- Unittests for target platform file implementation -----------------===//
//
// 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 "src/__support/File/file.h"
#include "test/UnitTest/Test.h"
#include "hdr/stdio_macros.h" // For SEEK_* macros
using File = LIBC_NAMESPACE::File;
constexpr char TEXT[] = "Hello, File";
constexpr size_t TEXT_SIZE = sizeof(TEXT) - 1; // Ignore the null terminator
LIBC_INLINE File *openfile(const char *file_name, const char *mode) {
auto error_or_file = LIBC_NAMESPACE::openfile(file_name, mode);
return error_or_file.has_value() ? error_or_file.value() : nullptr;
}
TEST(LlvmLibcPlatformFileTest, CreateWriteCloseAndReadBack) {
constexpr char FILENAME[] =
APPEND_LIBC_TEST("testdata/create_write_close_and_readback.test");
File *file = openfile(FILENAME, "w");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(file->write(TEXT, TEXT_SIZE).value, TEXT_SIZE);
ASSERT_EQ(file->close(), 0);
file = openfile(FILENAME, "r");
ASSERT_FALSE(file == nullptr);
char data[sizeof(TEXT)];
ASSERT_EQ(file->read(data, TEXT_SIZE).value, TEXT_SIZE);
data[TEXT_SIZE] = '\0';
ASSERT_STREQ(data, TEXT);
// Reading more data should trigger EOF.
ASSERT_EQ(file->read(data, TEXT_SIZE).value, size_t(0));
ASSERT_TRUE(file->iseof());
ASSERT_EQ(file->close(), 0);
}
TEST(LlvmLibcPlatformFileTest, CreateWriteSeekAndReadBack) {
constexpr char FILENAME[] =
APPEND_LIBC_TEST("testdata/create_write_seek_and_readback.test");
File *file = openfile(FILENAME, "w+");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(file->write(TEXT, TEXT_SIZE).value, TEXT_SIZE);
ASSERT_EQ(file->seek(0, SEEK_SET).value(), 0);
char data[sizeof(TEXT)];
ASSERT_EQ(file->read(data, TEXT_SIZE).value, TEXT_SIZE);
data[TEXT_SIZE] = '\0';
ASSERT_STREQ(data, TEXT);
// Reading more data should trigger EOF.
ASSERT_EQ(file->read(data, TEXT_SIZE).value, size_t(0));
ASSERT_TRUE(file->iseof());
ASSERT_EQ(file->close(), 0);
}
TEST(LlvmLibcPlatformFileTest, CreateAppendCloseAndReadBack) {
constexpr char FILENAME[] =
APPEND_LIBC_TEST("testdata/create_append_close_and_readback.test");
File *file = openfile(FILENAME, "w");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(file->write(TEXT, TEXT_SIZE).value, TEXT_SIZE);
ASSERT_EQ(file->close(), 0);
file = openfile(FILENAME, "a");
ASSERT_FALSE(file == nullptr);
constexpr char APPEND_TEXT[] = " Append Text";
constexpr size_t APPEND_TEXT_SIZE = sizeof(APPEND_TEXT) - 1;
ASSERT_EQ(file->write(APPEND_TEXT, APPEND_TEXT_SIZE).value, APPEND_TEXT_SIZE);
ASSERT_EQ(file->close(), 0);
file = openfile(FILENAME, "r");
ASSERT_FALSE(file == nullptr);
constexpr size_t READ_SIZE = TEXT_SIZE + APPEND_TEXT_SIZE;
char data[READ_SIZE + 1];
ASSERT_EQ(file->read(data, READ_SIZE).value, READ_SIZE);
data[READ_SIZE] = '\0';
ASSERT_STREQ(data, "Hello, File Append Text");
// Reading more data should trigger EOF.
ASSERT_EQ(file->read(data, READ_SIZE).value, size_t(0));
ASSERT_TRUE(file->iseof());
ASSERT_EQ(file->close(), 0);
}
TEST(LlvmLibcPlatformFileTest, CreateAppendSeekAndReadBack) {
constexpr char FILENAME[] =
APPEND_LIBC_TEST("testdata/create_append_seek_and_readback.test");
File *file = openfile(FILENAME, "w");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(file->write(TEXT, TEXT_SIZE).value, TEXT_SIZE);
ASSERT_EQ(file->close(), 0);
file = openfile(FILENAME, "a+");
ASSERT_FALSE(file == nullptr);
constexpr char APPEND_TEXT[] = " Append Text";
constexpr size_t APPEND_TEXT_SIZE = sizeof(APPEND_TEXT) - 1;
ASSERT_EQ(file->write(APPEND_TEXT, APPEND_TEXT_SIZE).value, APPEND_TEXT_SIZE);
ASSERT_EQ(file->seek(-static_cast<off_t>(APPEND_TEXT_SIZE), SEEK_END).value(),
0);
char data[APPEND_TEXT_SIZE + 1];
ASSERT_EQ(file->read(data, APPEND_TEXT_SIZE).value, APPEND_TEXT_SIZE);
data[APPEND_TEXT_SIZE] = '\0';
ASSERT_STREQ(data, APPEND_TEXT);
// Reading more data should trigger EOF.
ASSERT_EQ(file->read(data, APPEND_TEXT_SIZE).value, size_t(0));
ASSERT_TRUE(file->iseof());
ASSERT_EQ(file->close(), 0);
}
TEST(LlvmLibcPlatformFileTest, LargeFile) {
constexpr size_t DATA_SIZE = File::DEFAULT_BUFFER_SIZE >> 2;
constexpr char BYTE = 123;
char write_data[DATA_SIZE];
for (size_t i = 0; i < DATA_SIZE; ++i)
write_data[i] = BYTE;
constexpr char FILENAME[] = APPEND_LIBC_TEST("testdata/large_file.test");
File *file = openfile(FILENAME, "w");
ASSERT_FALSE(file == nullptr);
constexpr int REPEAT = 5;
for (int i = 0; i < REPEAT; ++i) {
ASSERT_EQ(file->write(write_data, DATA_SIZE).value, DATA_SIZE);
}
ASSERT_EQ(file->close(), 0);
file = openfile(FILENAME, "r");
ASSERT_FALSE(file == nullptr);
constexpr size_t READ_SIZE = DATA_SIZE * REPEAT;
char data[READ_SIZE] = {0};
ASSERT_EQ(file->read(data, READ_SIZE).value, READ_SIZE);
for (size_t i = 0; i < READ_SIZE; ++i)
ASSERT_EQ(data[i], BYTE);
// Reading more data should trigger EOF.
ASSERT_EQ(file->read(data, 1).value, size_t(0));
ASSERT_TRUE(file->iseof());
ASSERT_EQ(file->close(), 0);
}
TEST(LlvmLibcPlatformFileTest, ReadSeekCurAndRead) {
constexpr char FILENAME[] =
APPEND_LIBC_TEST("testdata/read_seek_cur_and_read.test");
File *file = openfile(FILENAME, "w");
ASSERT_FALSE(file == nullptr);
constexpr char CONTENT[] = "1234567890987654321";
ASSERT_EQ(sizeof(CONTENT) - 1,
file->write(CONTENT, sizeof(CONTENT) - 1).value);
ASSERT_EQ(0, file->close());
file = openfile(FILENAME, "r");
ASSERT_FALSE(file == nullptr);
constexpr size_t READ_SIZE = 5;
char data[READ_SIZE];
data[READ_SIZE - 1] = '\0';
ASSERT_EQ(file->read(data, READ_SIZE - 1).value, READ_SIZE - 1);
ASSERT_STREQ(data, "1234");
ASSERT_EQ(file->seek(5, SEEK_CUR).value(), 0);
ASSERT_EQ(file->read(data, READ_SIZE - 1).value, READ_SIZE - 1);
ASSERT_STREQ(data, "0987");
ASSERT_EQ(file->seek(-5, SEEK_CUR).value(), 0);
ASSERT_EQ(file->read(data, READ_SIZE - 1).value, READ_SIZE - 1);
ASSERT_STREQ(data, "9098");
ASSERT_EQ(file->close(), 0);
}
TEST(LlvmLibcPlatformFileTest, IncorrectOperation) {
constexpr char FILENAME[] =
APPEND_LIBC_TEST("testdata/incorrect_operation.test");
char data[1] = {123};
File *file = openfile(FILENAME, "w");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(file->read(data, 1).value, size_t(0)); // Cannot read
ASSERT_FALSE(file->iseof());
ASSERT_TRUE(file->error());
ASSERT_EQ(file->close(), 0);
file = openfile(FILENAME, "r");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(file->write(data, 1).value, size_t(0)); // Cannot write
ASSERT_FALSE(file->iseof());
ASSERT_TRUE(file->error());
ASSERT_EQ(file->close(), 0);
file = openfile(FILENAME, "a");
ASSERT_FALSE(file == nullptr);
ASSERT_EQ(file->read(data, 1).value, size_t(0)); // Cannot read
ASSERT_FALSE(file->iseof());
ASSERT_TRUE(file->error());
ASSERT_EQ(file->close(), 0);
}
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