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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 <atomic>
#include <chrono>
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::string get(std::chrono::steady_clock::time_point FreshTime,
bool ExpectParse) const {
bool GotParse = false;
bool GotRead;
std::string Result;
read(
FS, FreshTime,
[&](llvm::Optional<llvm::StringRef> Data) {
GotParse = true;
Value = Data.getValueOr("").str();
},
[&]() {
GotRead = true;
Result = Value;
});
EXPECT_EQ(GotParse, ExpectParse);
EXPECT_TRUE(GotRead);
return Result;
}
};
TEST(FileCacheTest, Invalidation) {
TestCache C;
auto StaleOK = std::chrono::steady_clock::now();
auto MustBeFresh = StaleOK + std::chrono::hours(1);
C.setContents("a");
EXPECT_EQ("a", C.get(StaleOK, /*ExpectParse=*/true)) << "Parsed first time";
EXPECT_EQ("a", C.get(StaleOK, /*ExpectParse=*/false)) << "Cached (time)";
EXPECT_EQ("a", C.get(MustBeFresh, /*ExpectParse=*/false)) << "Cached (stat)";
C.setContents("bb");
EXPECT_EQ("a", C.get(StaleOK, /*ExpectParse=*/false)) << "Cached (time)";
EXPECT_EQ("bb", C.get(MustBeFresh, /*ExpectParse=*/true)) << "Size changed";
EXPECT_EQ("bb", C.get(MustBeFresh, /*ExpectParse=*/true)) << "Cached (stat)";
C.setContents(nullptr);
EXPECT_EQ("bb", C.get(StaleOK, /*ExpectParse=*/false)) << "Cached (time)";
EXPECT_EQ("", C.get(MustBeFresh, /*ExpectParse=*/true)) << "Stat failed";
EXPECT_EQ("", C.get(MustBeFresh, /*ExpectParse=*/false)) << "Cached (404)";
C.setContents("bb"); // Match the previous stat values!
EXPECT_EQ("", C.get(StaleOK, /*ExpectParse=*/false)) << "Cached (time)";
EXPECT_EQ("bb", C.get(MustBeFresh, /*ExpectParse=*/true)) << "Size changed";
}
} // namespace
} // namespace config
} // namespace clangd
} // namespace clang
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