1 //===- llvm/unittest/Support/FileUtilitiesTest.cpp - unit tests -----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "llvm/Support/FileUtilities.h"
10 #include "llvm/Support/Errc.h"
11 #include "llvm/Support/ErrorHandling.h"
12 #include "llvm/Support/FileSystem.h"
13 #include "llvm/Support/MemoryBuffer.h"
14 #include "llvm/Support/Path.h"
15 #include "llvm/Testing/Support/SupportHelpers.h"
16 #include "gtest/gtest.h"
17 #include <fstream>
18 
19 using namespace llvm;
20 using namespace llvm::sys;
21 
22 using llvm::unittest::TempDir;
23 
24 #define ASSERT_NO_ERROR(x)                                                     \
25   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
26     SmallString<128> MessageStorage;                                           \
27     raw_svector_ostream Message(MessageStorage);                               \
28     Message << #x ": did not return errc::success.\n"                          \
29             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
30             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
31     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
32   } else {                                                                     \
33   }
34 
35 namespace {
TEST(writeFileAtomicallyTest,Test)36 TEST(writeFileAtomicallyTest, Test) {
37   // Create unique temporary directory for these tests
38   TempDir RootTestDirectory("writeFileAtomicallyTest", /*Unique*/ true);
39 
40   SmallString<128> FinalTestfilePath(RootTestDirectory.path());
41   sys::path::append(FinalTestfilePath, "foo.txt");
42   const std::string TempUniqTestFileModel =
43       std::string(FinalTestfilePath) + "-%%%%%%%%";
44   const std::string TestfileContent = "fooFOOfoo";
45 
46   llvm::Error Err = llvm::writeFileAtomically(TempUniqTestFileModel, FinalTestfilePath, TestfileContent);
47   ASSERT_FALSE(static_cast<bool>(Err));
48 
49   std::ifstream FinalFileStream(std::string(FinalTestfilePath.str()));
50   std::string FinalFileContent;
51   FinalFileStream >> FinalFileContent;
52   ASSERT_EQ(FinalFileContent, TestfileContent);
53 }
54 } // anonymous namespace
55