87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
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//===-- FileCacheTests.cpp ------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "support/FileCache.h"
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#include "TestFS.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include <chrono>
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#include <optional>
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#include <utility>
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namespace clang {
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namespace clangd {
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namespace config {
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namespace {
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class TestCache : public FileCache {
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MockFS FS;
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mutable std::string Value;
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public:
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TestCache() : FileCache(testPath("foo.cc")) {}
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void setContents(const char *C) {
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if (C)
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FS.Files[testPath("foo.cc")] = C;
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else
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FS.Files.erase(testPath("foo.cc"));
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}
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std::pair<std::string, /*Parsed=*/bool>
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get(std::chrono::steady_clock::time_point FreshTime) const {
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bool GotParse = false;
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bool GotRead = false;
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std::string Result;
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read(
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FS, FreshTime,
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[&](std::optional<llvm::StringRef> Data) {
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GotParse = true;
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Value = Data.value_or("").str();
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},
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[&]() {
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GotRead = true;
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Result = Value;
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});
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EXPECT_TRUE(GotRead);
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return {Result, GotParse};
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}
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};
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MATCHER_P(Parsed, Value, "") { return arg.second && arg.first == Value; }
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MATCHER_P(Cached, Value, "") { return !arg.second && arg.first == Value; }
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TEST(FileCacheTest, Invalidation) {
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TestCache C;
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auto StaleOK = std::chrono::steady_clock::now();
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auto MustBeFresh = StaleOK + std::chrono::hours(1);
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C.setContents("a");
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EXPECT_THAT(C.get(StaleOK), Parsed("a")) << "Parsed first time";
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EXPECT_THAT(C.get(StaleOK), Cached("a")) << "Cached (time)";
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EXPECT_THAT(C.get(MustBeFresh), Cached("a")) << "Cached (stat)";
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C.setContents("bb");
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EXPECT_THAT(C.get(StaleOK), Cached("a")) << "Cached (time)";
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EXPECT_THAT(C.get(MustBeFresh), Parsed("bb")) << "Size changed";
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EXPECT_THAT(C.get(MustBeFresh), Cached("bb")) << "Cached (stat)";
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C.setContents(nullptr);
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EXPECT_THAT(C.get(StaleOK), Cached("bb")) << "Cached (time)";
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EXPECT_THAT(C.get(MustBeFresh), Parsed("")) << "stat failed";
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EXPECT_THAT(C.get(MustBeFresh), Cached("")) << "Cached (404)";
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C.setContents("bb"); // Match the previous stat values!
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EXPECT_THAT(C.get(StaleOK), Cached("")) << "Cached (time)";
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EXPECT_THAT(C.get(MustBeFresh), Parsed("bb")) << "Size changed";
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}
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} // namespace
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} // namespace config
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} // namespace clangd
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} // namespace clang
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