clang-tools-extra/clangd/unittests/CanonicalIncludesTests.cpp

   1 //===-- CanonicalIncludesTests.cpp - --------------------------------------===//
   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 "index/CanonicalIncludes.h"
  10 #include "clang/Basic/FileEntry.h"
  11 #include "clang/Basic/FileManager.h"
  12 #include "clang/Basic/FileSystemOptions.h"
  13 #include "clang/Basic/LangOptions.h"
  14 #include "llvm/ADT/IntrusiveRefCntPtr.h"
  15 #include "llvm/ADT/StringRef.h"
  16 #include "llvm/Support/Error.h"
  17 #include "llvm/Support/VirtualFileSystem.h"
  18 #include "llvm/Testing/Support/Error.h"
  19 #include "gtest/gtest.h"
  20
  21 namespace clang {
  22 namespace clangd {
  23 namespace {
  24
  25 FileEntryRef addFile(llvm::vfs::InMemoryFileSystem &FS, FileManager &FM,
  26                      llvm::StringRef Filename) {
  27   FS.addFile(Filename, 0, llvm::MemoryBuffer::getMemBuffer(""));
  28   auto File = FM.getFileRef(Filename);
  29   EXPECT_THAT_EXPECTED(File, llvm::Succeeded());
  30   return *File;
  31 }
  32
  33 TEST(CanonicalIncludesTest, SystemHeaderMap) {
  34   auto InMemFS = llvm::makeIntrusiveRefCnt<llvm::vfs::InMemoryFileSystem>();
  35   FileManager Files(FileSystemOptions(), InMemFS);
  36
  37   CanonicalIncludes CI;
  38   LangOptions Language;
  39   Language.CPlusPlus = true;
  40   CI.addSystemHeadersMapping(Language);
  41
  42   // We should have a path from 'bits/stl_vector.h' to '<vector>'.
  43   // FIXME: The Standrad Library map in CanonicalIncludes expects forward
  44   // slashes and Windows would use backward slashes instead, so the headers are
  45   // not matched appropriately.
  46   auto STLVectorFile = addFile(*InMemFS, Files, "bits/stl_vector.h");
  47   ASSERT_EQ("<vector>", CI.mapHeader(STLVectorFile.getName()));
  48 }
  49
  50 } // namespace
  51 } // namespace clangd
  52 } // namespace clang