mirror of
https://github.com/fmtlib/fmt.git
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385 lines
9.6 KiB
C++
385 lines
9.6 KiB
C++
// Formatting library for C++ - tests of the C++ interface to POSIX functions
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#include <cstdlib> // std::exit
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#include <cstring>
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#include <memory>
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#include "fmt/posix.h"
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#include "gtest-extra.h"
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#include "util.h"
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#ifdef fileno
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# undef fileno
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#endif
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using fmt::buffered_file;
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using fmt::error_code;
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using fmt::file;
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// Checks if the file is open by reading one character from it.
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static bool isopen(int fd) {
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char buffer;
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return FMT_POSIX(read(fd, &buffer, 1)) == 1;
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}
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static bool isclosed(int fd) {
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char buffer;
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std::streamsize result = 0;
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SUPPRESS_ASSERT(result = FMT_POSIX(read(fd, &buffer, 1)));
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return result == -1 && errno == EBADF;
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}
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// Opens a file for reading.
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static file open_file() {
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file read_end, write_end;
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file::pipe(read_end, write_end);
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write_end.write(FILE_CONTENT, std::strlen(FILE_CONTENT));
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write_end.close();
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return read_end;
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}
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// Attempts to write a string to a file.
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static void write(file& f, fmt::string_view s) {
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std::size_t num_chars_left = s.size();
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const char* ptr = s.data();
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do {
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std::size_t count = f.write(ptr, num_chars_left);
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ptr += count;
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// We can't write more than size_t bytes since num_chars_left
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// has type size_t.
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num_chars_left -= count;
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} while (num_chars_left != 0);
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}
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TEST(BufferedFileTest, DefaultCtor) {
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buffered_file f;
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EXPECT_TRUE(f.get() == FMT_NULL);
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}
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TEST(BufferedFileTest, MoveCtor) {
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buffered_file bf = open_buffered_file();
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FILE* fp = bf.get();
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EXPECT_TRUE(fp != FMT_NULL);
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buffered_file bf2(std::move(bf));
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EXPECT_EQ(fp, bf2.get());
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EXPECT_TRUE(bf.get() == FMT_NULL);
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}
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TEST(BufferedFileTest, MoveAssignment) {
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buffered_file bf = open_buffered_file();
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FILE* fp = bf.get();
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EXPECT_TRUE(fp != FMT_NULL);
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buffered_file bf2;
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bf2 = std::move(bf);
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EXPECT_EQ(fp, bf2.get());
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EXPECT_TRUE(bf.get() == FMT_NULL);
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}
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TEST(BufferedFileTest, MoveAssignmentClosesFile) {
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buffered_file bf = open_buffered_file();
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buffered_file bf2 = open_buffered_file();
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int old_fd = bf2.fileno();
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bf2 = std::move(bf);
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EXPECT_TRUE(isclosed(old_fd));
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}
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TEST(BufferedFileTest, MoveFromTemporaryInCtor) {
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FILE* fp = FMT_NULL;
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buffered_file f(open_buffered_file(&fp));
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EXPECT_EQ(fp, f.get());
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}
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TEST(BufferedFileTest, MoveFromTemporaryInAssignment) {
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FILE* fp = FMT_NULL;
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buffered_file f;
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f = open_buffered_file(&fp);
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EXPECT_EQ(fp, f.get());
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}
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TEST(BufferedFileTest, MoveFromTemporaryInAssignmentClosesFile) {
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buffered_file f = open_buffered_file();
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int old_fd = f.fileno();
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f = open_buffered_file();
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EXPECT_TRUE(isclosed(old_fd));
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}
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TEST(BufferedFileTest, CloseFileInDtor) {
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int fd = 0;
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{
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buffered_file f = open_buffered_file();
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fd = f.fileno();
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}
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EXPECT_TRUE(isclosed(fd));
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}
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TEST(BufferedFileTest, CloseErrorInDtor) {
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std::unique_ptr<buffered_file> f(new buffered_file(open_buffered_file()));
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EXPECT_WRITE(stderr,
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{
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// The close function must be called inside EXPECT_WRITE,
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// otherwise the system may recycle closed file descriptor when
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// redirecting the output in EXPECT_STDERR and the second close
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// will break output redirection.
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FMT_POSIX(close(f->fileno()));
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SUPPRESS_ASSERT(f.reset(FMT_NULL));
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},
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format_system_error(EBADF, "cannot close file") + "\n");
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}
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TEST(BufferedFileTest, Close) {
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buffered_file f = open_buffered_file();
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int fd = f.fileno();
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f.close();
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EXPECT_TRUE(f.get() == FMT_NULL);
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EXPECT_TRUE(isclosed(fd));
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}
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TEST(BufferedFileTest, CloseError) {
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buffered_file f = open_buffered_file();
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FMT_POSIX(close(f.fileno()));
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EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
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EXPECT_TRUE(f.get() == FMT_NULL);
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}
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TEST(BufferedFileTest, Fileno) {
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buffered_file f;
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#ifndef __COVERITY__
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// fileno on a null FILE pointer either crashes or returns an error.
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// Disable Coverity because this is intentional.
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EXPECT_DEATH_IF_SUPPORTED(
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{
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try {
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f.fileno();
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} catch (const fmt::system_error&) {
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std::exit(1);
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}
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},
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"");
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#endif
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f = open_buffered_file();
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EXPECT_TRUE(f.fileno() != -1);
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file copy = file::dup(f.fileno());
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EXPECT_READ(copy, FILE_CONTENT);
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}
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TEST(FileTest, DefaultCtor) {
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file f;
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EXPECT_EQ(-1, f.descriptor());
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}
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TEST(FileTest, OpenBufferedFileInCtor) {
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FILE* fp = safe_fopen("test-file", "w");
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std::fputs(FILE_CONTENT, fp);
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std::fclose(fp);
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file f("test-file", file::RDONLY);
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ASSERT_TRUE(isopen(f.descriptor()));
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}
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TEST(FileTest, OpenBufferedFileError) {
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EXPECT_SYSTEM_ERROR(file("nonexistent", file::RDONLY), ENOENT,
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"cannot open file nonexistent");
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}
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TEST(FileTest, MoveCtor) {
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file f = open_file();
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int fd = f.descriptor();
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EXPECT_NE(-1, fd);
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file f2(std::move(f));
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EXPECT_EQ(fd, f2.descriptor());
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EXPECT_EQ(-1, f.descriptor());
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}
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TEST(FileTest, MoveAssignment) {
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file f = open_file();
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int fd = f.descriptor();
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EXPECT_NE(-1, fd);
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file f2;
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f2 = std::move(f);
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EXPECT_EQ(fd, f2.descriptor());
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EXPECT_EQ(-1, f.descriptor());
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}
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TEST(FileTest, MoveAssignmentClosesFile) {
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file f = open_file();
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file f2 = open_file();
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int old_fd = f2.descriptor();
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f2 = std::move(f);
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EXPECT_TRUE(isclosed(old_fd));
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}
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static file OpenBufferedFile(int& fd) {
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file f = open_file();
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fd = f.descriptor();
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return f;
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}
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TEST(FileTest, MoveFromTemporaryInCtor) {
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int fd = 0xdead;
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file f(OpenBufferedFile(fd));
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EXPECT_EQ(fd, f.descriptor());
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}
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TEST(FileTest, MoveFromTemporaryInAssignment) {
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int fd = 0xdead;
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file f;
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f = OpenBufferedFile(fd);
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EXPECT_EQ(fd, f.descriptor());
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}
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TEST(FileTest, MoveFromTemporaryInAssignmentClosesFile) {
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int fd = 0xdead;
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file f = open_file();
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int old_fd = f.descriptor();
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f = OpenBufferedFile(fd);
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EXPECT_TRUE(isclosed(old_fd));
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}
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TEST(FileTest, CloseFileInDtor) {
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int fd = 0;
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{
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file f = open_file();
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fd = f.descriptor();
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}
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EXPECT_TRUE(isclosed(fd));
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}
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TEST(FileTest, CloseErrorInDtor) {
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std::unique_ptr<file> f(new file(open_file()));
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EXPECT_WRITE(stderr,
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{
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// The close function must be called inside EXPECT_WRITE,
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// otherwise the system may recycle closed file descriptor when
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// redirecting the output in EXPECT_STDERR and the second close
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// will break output redirection.
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FMT_POSIX(close(f->descriptor()));
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SUPPRESS_ASSERT(f.reset(FMT_NULL));
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},
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format_system_error(EBADF, "cannot close file") + "\n");
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}
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TEST(FileTest, Close) {
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file f = open_file();
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int fd = f.descriptor();
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f.close();
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EXPECT_EQ(-1, f.descriptor());
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EXPECT_TRUE(isclosed(fd));
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}
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TEST(FileTest, CloseError) {
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file f = open_file();
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FMT_POSIX(close(f.descriptor()));
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EXPECT_SYSTEM_ERROR_NOASSERT(f.close(), EBADF, "cannot close file");
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EXPECT_EQ(-1, f.descriptor());
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}
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TEST(FileTest, Read) {
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file f = open_file();
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EXPECT_READ(f, FILE_CONTENT);
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}
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TEST(FileTest, ReadError) {
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file f("test-file", file::WRONLY);
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char buf;
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// We intentionally read from a file opened in the write-only mode to
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// cause error.
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EXPECT_SYSTEM_ERROR(f.read(&buf, 1), EBADF, "cannot read from file");
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}
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TEST(FileTest, Write) {
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file read_end, write_end;
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file::pipe(read_end, write_end);
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write(write_end, "test");
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write_end.close();
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EXPECT_READ(read_end, "test");
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}
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TEST(FileTest, WriteError) {
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file f("test-file", file::RDONLY);
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// We intentionally write to a file opened in the read-only mode to
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// cause error.
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EXPECT_SYSTEM_ERROR(f.write(" ", 1), EBADF, "cannot write to file");
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}
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TEST(FileTest, Dup) {
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file f = open_file();
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file copy = file::dup(f.descriptor());
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EXPECT_NE(f.descriptor(), copy.descriptor());
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EXPECT_EQ(FILE_CONTENT, read(copy, std::strlen(FILE_CONTENT)));
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}
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#ifndef __COVERITY__
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TEST(FileTest, DupError) {
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int value = -1;
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EXPECT_SYSTEM_ERROR_NOASSERT(file::dup(value), EBADF,
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"cannot duplicate file descriptor -1");
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}
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#endif
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TEST(FileTest, Dup2) {
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file f = open_file();
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file copy = open_file();
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f.dup2(copy.descriptor());
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EXPECT_NE(f.descriptor(), copy.descriptor());
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EXPECT_READ(copy, FILE_CONTENT);
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}
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TEST(FileTest, Dup2Error) {
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file f = open_file();
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EXPECT_SYSTEM_ERROR_NOASSERT(
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f.dup2(-1), EBADF,
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fmt::format("cannot duplicate file descriptor {} to -1", f.descriptor()));
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}
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TEST(FileTest, Dup2NoExcept) {
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file f = open_file();
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file copy = open_file();
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error_code ec;
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f.dup2(copy.descriptor(), ec);
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EXPECT_EQ(ec.get(), 0);
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EXPECT_NE(f.descriptor(), copy.descriptor());
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EXPECT_READ(copy, FILE_CONTENT);
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}
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TEST(FileTest, Dup2NoExceptError) {
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file f = open_file();
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error_code ec;
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SUPPRESS_ASSERT(f.dup2(-1, ec));
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EXPECT_EQ(EBADF, ec.get());
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}
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TEST(FileTest, Pipe) {
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file read_end, write_end;
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file::pipe(read_end, write_end);
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EXPECT_NE(-1, read_end.descriptor());
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EXPECT_NE(-1, write_end.descriptor());
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write(write_end, "test");
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EXPECT_READ(read_end, "test");
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}
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TEST(FileTest, Fdopen) {
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file read_end, write_end;
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file::pipe(read_end, write_end);
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int read_fd = read_end.descriptor();
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EXPECT_EQ(read_fd, FMT_POSIX(fileno(read_end.fdopen("r").get())));
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}
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TEST(FileTest, FdopenError) {
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file f;
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EXPECT_SYSTEM_ERROR_NOASSERT(f.fdopen("r"), EBADF,
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"cannot associate stream with file descriptor");
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}
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#ifdef FMT_LOCALE
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TEST(LocaleTest, Strtod) {
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fmt::Locale locale;
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const char *start = "4.2", *ptr = start;
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EXPECT_EQ(4.2, locale.strtod(ptr));
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EXPECT_EQ(start + 3, ptr);
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}
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#endif
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