unittests/Support/FileUtilitiesTest.cpp

   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 "gtest/gtest.h"
  16 #include <fstream>
  17
  18 using namespace llvm;
  19 using namespace llvm::sys;
  20
  21 #define ASSERT_NO_ERROR(x)                                                     \
  22   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
  23     SmallString<128> MessageStorage;                                           \
  24     raw_svector_ostream Message(MessageStorage);                               \
  25     Message << #x ": did not return errc::success.\n"                          \
  26             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
  27             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
  28     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
  29   } else {                                                                     \
  30   }
  31
  32 namespace {
  33 TEST(writeFileAtomicallyTest, Test) {
  34   // Create unique temporary directory for these tests
  35   SmallString<128> RootTestDirectory;
  36   ASSERT_NO_ERROR(
  37     fs::createUniqueDirectory("writeFileAtomicallyTest", RootTestDirectory));
  38
  39   SmallString<128> FinalTestfilePath(RootTestDirectory);
  40   sys::path::append(FinalTestfilePath, "foo.txt");
  41   const std::string TempUniqTestFileModel = FinalTestfilePath.str().str() + "-%%%%%%%%";
  42   const std::string TestfileContent = "fooFOOfoo";
  43
  44   llvm::Error Err = llvm::writeFileAtomically(TempUniqTestFileModel, FinalTestfilePath, TestfileContent);
  45   ASSERT_FALSE(static_cast<bool>(Err));
  46
  47   std::ifstream FinalFileStream(FinalTestfilePath.str());
  48   std::string FinalFileContent;
  49   FinalFileStream >> FinalFileContent;
  50   ASSERT_EQ(FinalFileContent, TestfileContent);
  51 }
  52 } // anonymous namespace