1 files changed, 46 insertions, 0 deletions
diff --git a/clang-tools-extra/unittests/clangd/FSTests.cpp b/clang-tools-extra/unittests/clangd/FSTests.cpp
new file mode 100644
index 00000000000..3b028426016
--- /dev/null
+++ b/clang-tools-extra/unittests/clangd/FSTests.cpp
@@ -0,0 +1,46 @@
+//===-- FSTests.cpp - File system related tests -----------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "FS.h"
+#include "TestFS.h"
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace clang {
+namespace clangd {
+namespace {
+
+TEST(FSTests, PreambleStatusCache) {
+  llvm::StringMap<std::string> Files;
+  Files["x"] = "";
+  Files["y"] = "";
+  auto FS = buildTestFS(Files);
+  FS->setCurrentWorkingDirectory(testRoot());
+
+  PreambleFileStatusCache StatCache;
+  auto ProduceFS = StatCache.getProducingFS(FS);
+  EXPECT_TRUE(ProduceFS->openFileForRead("x"));
+  EXPECT_TRUE(ProduceFS->status("y"));
+
+  EXPECT_TRUE(StatCache.lookup(testPath("x")).hasValue());
+  EXPECT_TRUE(StatCache.lookup(testPath("y")).hasValue());
+
+  vfs::Status S("fake", llvm::sys::fs::UniqueID(0, 0),
+                std::chrono::system_clock::now(), 0, 0, 1024,
+                llvm::sys::fs::file_type::regular_file, llvm::sys::fs::all_all);
+  StatCache.update(*FS, S);
+  auto ConsumeFS = StatCache.getConsumingFS(FS);
+  auto Cached = ConsumeFS->status(testPath("fake"));
+  EXPECT_TRUE(Cached);
+  EXPECT_EQ(Cached->getName(), S.getName());
+}
+
+} // namespace
+} // namespace clangd
+} // namespace clang