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

   1 //===-- FSTests.cpp - File system related tests -----------------*- C++ -*-===//
   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 "FS.h"
  10 #include "TestFS.h"
  11 #include "gmock/gmock.h"
  12 #include "gtest/gtest.h"
  13
  14 namespace clang {
  15 namespace clangd {
  16 namespace {
  17
  18 TEST(FSTests, PreambleStatusCache) {
  19   llvm::StringMap<std::string> Files;
  20   Files["x"] = "";
  21   Files["y"] = "";
  22   Files["main"] = "";
  23   auto FS = buildTestFS(Files);
  24
  25   PreambleFileStatusCache StatCache(testPath("main"));
  26   auto ProduceFS = StatCache.getProducingFS(FS);
  27   EXPECT_TRUE(ProduceFS->openFileForRead("x"));
  28   EXPECT_TRUE(ProduceFS->status("y"));
  29   EXPECT_TRUE(ProduceFS->status("main"));
  30
  31   EXPECT_TRUE(StatCache.lookup(testPath("x")).has_value());
  32   EXPECT_TRUE(StatCache.lookup(testPath("y")).has_value());
  33   // Main file is not cached.
  34   EXPECT_FALSE(StatCache.lookup(testPath("main")).has_value());
  35
  36   llvm::vfs::Status S("fake", llvm::sys::fs::UniqueID(123, 456),
  37                       std::chrono::system_clock::now(), 0, 0, 1024,
  38                       llvm::sys::fs::file_type::regular_file,
  39                       llvm::sys::fs::all_all);
  40   StatCache.update(*FS, S, "real");
  41   auto ConsumeFS = StatCache.getConsumingFS(FS);
  42   EXPECT_FALSE(ConsumeFS->status(testPath("fake")));
  43   auto Cached = ConsumeFS->status(testPath("real"));
  44   EXPECT_TRUE(Cached);
  45   EXPECT_EQ(Cached->getName(), testPath("real"));
  46   EXPECT_EQ(Cached->getUniqueID(), S.getUniqueID());
  47
  48   // real and temp/../real should hit the same cache entry.
  49   // However, the Status returned reflects the actual path requested.
  50   auto CachedDotDot = ConsumeFS->status(testPath("temp/../real"));
  51   EXPECT_TRUE(CachedDotDot);
  52   EXPECT_EQ(CachedDotDot->getName(), testPath("temp/../real"));
  53   EXPECT_EQ(CachedDotDot->getUniqueID(), S.getUniqueID());
  54 }
  55
  56 } // namespace
  57 } // namespace clangd
  58 } // namespace clang