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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cstdio>
#include <fstream>
#include <istream>
#include <memory>
#include <gtest/gtest.h>
#include <unit_tests/test_main.hpp>
#include <jellyfish/stdio_filebuf.hpp>
namespace {
typedef jellyfish::stdio_filebuf<char> stdio_filebuf;
TEST(StdioFileBuf, Read) {
const char* file_name = "test_stdio_file_buf_read";
file_unlink fu(file_name);
std::vector<char> buffer(8192);
for(size_t i = 0; i < buffer.size(); ++i)
buffer[i] = '@' + (i % 64);
{
std::ofstream out(file_name);
out.write(buffer.data(), buffer.size());
}
int fd = open(file_name, O_RDONLY);
EXPECT_GT(fd, -1);
FILE* file = fopen(file_name, "r");
EXPECT_NE((FILE*)0, file);
std::unique_ptr<stdio_filebuf> fd_buf(new stdio_filebuf(fd, std::ios::in));
std::istream fd_stream(fd_buf.get());
std::unique_ptr<stdio_filebuf> file_buf(new stdio_filebuf(file, std::ios::in));
std::istream file_stream(file_buf.get());
size_t have_read = 0;
char read_buffer[256];
while(have_read < buffer.size()) {
const size_t to_read = random_bits(8);
const size_t expect_read = std::min(buffer.size() - have_read, to_read);
fd_stream.read(read_buffer, to_read);
EXPECT_EQ(expect_read, (size_t)fd_stream.gcount());
EXPECT_EQ(0, std::strncmp(&buffer[have_read], read_buffer, expect_read));
file_stream.read(read_buffer, to_read);
EXPECT_EQ(expect_read, (size_t)fd_stream.gcount());
EXPECT_EQ(0, std::strncmp(&buffer[have_read], read_buffer, expect_read));
have_read += expect_read;
}
EXPECT_TRUE(fd_stream.eof() || fd_stream.peek() == EOF);
EXPECT_TRUE(file_stream.eof() || file_stream.peek() == EOF);
}
}
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