llvm/clang-tools-extra/clangd/unittests/TestFS.h

//===-- TestFS.h ------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Allows setting up fake filesystem environments for tests.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_UNITTESTS_TESTFS_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_UNITTESTS_TESTFS_H
#include "GlobalCompilationDatabase.h"
#include "support/Path.h"
#include "support/ThreadsafeFS.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/VirtualFileSystem.h"
#include <optional>

namespace clang {
namespace clangd {

// Builds a VFS that provides access to the provided files, plus temporary
// directories.
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>
buildTestFS(llvm::StringMap<std::string> const &Files,
            llvm::StringMap<time_t> const &Timestamps = { … };

// A VFS provider that returns TestFSes containing a provided set of files.
class MockFS : public ThreadsafeFS { … };

// A Compilation database that returns a fixed set of compile flags.
class MockCompilationDatabase : public GlobalCompilationDatabase { … };

// Returns an absolute (fake) test directory for this OS.
const char *testRoot();

// Returns a suitable absolute path for this OS.
std::string testPath(PathRef File,
                     llvm::sys::path::Style = llvm::sys::path::Style::native);

// unittest: is a scheme that refers to files relative to testRoot()
// This anchor is used to force the linker to link in the generated object file
// and thus register unittest: URI scheme plugin.
extern volatile int UnittestSchemeAnchorSource;

} // namespace clangd
} // namespace clang
#endif