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https://github.com/SerenityOS/serenity.git
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82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
/*
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* Copyright (c) 2022, Daniel Bertalan <[email protected]>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibFileSystem/TempFile.h>
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#include <LibTest/TestCase.h>
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#include <stdio.h>
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#include <sys/wait.h>
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#include <unistd.h>
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// Test whether file writes are flushed to disk at program termination,
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// even if we do not close the files or call fflush().
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TEST_CASE(flush_on_exit)
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{
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static constexpr auto test_str = "peekaboo";
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auto pid = fork();
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VERIFY(pid >= 0);
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if (pid == 0) {
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auto* fp = fopen("/tmp/flushtest", "w");
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VERIFY(fp != nullptr);
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auto nwritten = fwrite(test_str, 1, strlen(test_str), fp);
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VERIFY(nwritten != 0);
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// We intentionally leak `fp` here.
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exit(0);
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} else {
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int wstatus;
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auto rc = waitpid(pid, &wstatus, 0);
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VERIFY(rc >= 0);
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char buf[256];
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auto* fp = fopen("/tmp/flushtest", "r");
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VERIFY(fp != nullptr);
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auto* sp = fgets(buf, sizeof(buf), fp);
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VERIFY(sp != nullptr);
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fclose(fp);
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unlink("/tmp/flushtest");
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EXPECT_EQ(strcmp(test_str, buf), 0);
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}
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}
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TEST_CASE(sprintf_sign)
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{
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char buf1[128];
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int ret1 = sprintf(buf1, "%+d", 12);
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EXPECT_EQ(ret1, 3);
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char buf2[128];
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int ret2 = sprintf(buf2, "%+d", -12);
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EXPECT_EQ(ret2, 3);
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EXPECT_EQ(buf1, "+12"sv);
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EXPECT_EQ(buf2, "-12"sv);
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}
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TEST_CASE(cannot_write_to_read_only_file)
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{
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auto temp_file = TRY_OR_FAIL(FileSystem::TempFile::create_temp_file());
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auto c_file = fopen(temp_file->path().characters(), "r");
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EXPECT(c_file);
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EXPECT_EQ(fputc('x', c_file), EOF);
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EXPECT(ferror(c_file));
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EXPECT(!fclose(c_file));
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}
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TEST_CASE(cannot_read_from_write_only_file)
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{
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auto temp_file = TRY_OR_FAIL(FileSystem::TempFile::create_temp_file());
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auto c_file = fopen(temp_file->path().characters(), "w");
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EXPECT(c_file);
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EXPECT_EQ(fgetc(c_file), EOF);
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EXPECT(ferror(c_file));
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EXPECT(!fclose(c_file));
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}
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