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//===-- FileCacheTests.cpp ------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "support/FileCache.h"
#include "TestFS.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <chrono>
#include <optional>
#include <utility>
namespace clang {
namespace clangd {
namespace config {
namespace {
class TestCache : public FileCache {
MockFS FS;
mutable std::string Value;
public:
TestCache() : FileCache(testPath("foo.cc")) {}
void setContents(const char *C) {
if (C)
FS.Files[testPath("foo.cc")] = C;
else
FS.Files.erase(testPath("foo.cc"));
}
std::pair<std::string, /*Parsed=*/bool>
get(std::chrono::steady_clock::time_point FreshTime) const {
bool GotParse = false;
bool GotRead = false;
std::string Result;
read(
FS, FreshTime,
[&](std::optional<llvm::StringRef> Data) {
GotParse = true;
Value = Data.value_or("").str();
},
[&]() {
GotRead = true;
Result = Value;
});
EXPECT_TRUE(GotRead);
return {Result, GotParse};
}
};
MATCHER_P(Parsed, Value, "") { return arg.second && arg.first == Value; }
MATCHER_P(Cached, Value, "") { return !arg.second && arg.first == Value; }
TEST(FileCacheTest, Invalidation) {
TestCache C;
auto StaleOK = std::chrono::steady_clock::now();
auto MustBeFresh = StaleOK + std::chrono::hours(1);
C.setContents("a");
EXPECT_THAT(C.get(StaleOK), Parsed("a")) << "Parsed first time";
EXPECT_THAT(C.get(StaleOK), Cached("a")) << "Cached (time)";
EXPECT_THAT(C.get(MustBeFresh), Cached("a")) << "Cached (stat)";
C.setContents("bb");
EXPECT_THAT(C.get(StaleOK), Cached("a")) << "Cached (time)";
EXPECT_THAT(C.get(MustBeFresh), Parsed("bb")) << "Size changed";
EXPECT_THAT(C.get(MustBeFresh), Cached("bb")) << "Cached (stat)";
C.setContents(nullptr);
EXPECT_THAT(C.get(StaleOK), Cached("bb")) << "Cached (time)";
EXPECT_THAT(C.get(MustBeFresh), Parsed("")) << "stat failed";
EXPECT_THAT(C.get(MustBeFresh), Cached("")) << "Cached (404)";
C.setContents("bb"); // Match the previous stat values!
EXPECT_THAT(C.get(StaleOK), Cached("")) << "Cached (time)";
EXPECT_THAT(C.get(MustBeFresh), Parsed("bb")) << "Size changed";
}
} // namespace
} // namespace config
} // namespace clangd
} // namespace clang
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