From 6a1a70e6882e9ef19843cf7171fc74eee763da44 Mon Sep 17 00:00:00 2001
From: Maksim Denisov <denisov.maksim@huawei.com>
Date: Wed, 11 Dec 2024 15:27:12 +0100
Subject: Test TreeStructureCache

---
 .../tree_structure/tree_structure.test.cpp         | 119 +++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 test/buildtool/tree_structure/tree_structure.test.cpp

(limited to 'test/buildtool/tree_structure/tree_structure.test.cpp')

diff --git a/test/buildtool/tree_structure/tree_structure.test.cpp b/test/buildtool/tree_structure/tree_structure.test.cpp
new file mode 100644
index 00000000..e0656c69
--- /dev/null
+++ b/test/buildtool/tree_structure/tree_structure.test.cpp
@@ -0,0 +1,119 @@
+// Copyright 2024 Huawei Cloud Computing Technology Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cstdint>
+#include <filesystem>
+#include <memory>
+#include <optional>
+#include <string>
+
+#include "catch2/catch_test_macros.hpp"
+#include "gsl/gsl"
+#include "src/buildtool/common/artifact_digest.hpp"
+#include "src/buildtool/common/protocol_traits.hpp"
+#include "src/buildtool/crypto/hash_function.hpp"
+#include "src/buildtool/execution_api/bazel_msg/bazel_msg_factory.hpp"
+#include "src/buildtool/storage/config.hpp"
+#include "src/buildtool/storage/garbage_collector.hpp"
+#include "src/buildtool/storage/storage.hpp"
+#include "src/buildtool/tree_structure/tree_structure_cache.hpp"
+#include "src/utils/cpp/tmp_dir.hpp"
+#include "test/utils/hermeticity/test_storage_config.hpp"
+#include "test/utils/large_objects/large_object_utils.hpp"
+
+namespace {
+[[nodiscard]] auto CreateFlatTestDirectory(StorageConfig const& storage_config,
+                                           Storage const& storage,
+                                           std::uintmax_t entries)
+    -> std::optional<ArtifactDigest>;
+}
+
+TEST_CASE("cache", "[tree_structure]") {
+    auto const storage_config = TestStorageConfig::Create();
+    if (not ProtocolTraits::IsNative(
+            storage_config.Get().hash_function.GetType())) {
+        return;
+    }
+
+    auto const storage = Storage::Create(&storage_config.Get());
+    TreeStructureCache const ts_cache(&storage_config.Get());
+
+    auto const from_dir =
+        CreateFlatTestDirectory(storage_config.Get(), storage, 128);
+    REQUIRE(from_dir);
+    auto const to_dir =
+        CreateFlatTestDirectory(storage_config.Get(), storage, 128);
+    REQUIRE(to_dir);
+
+    // Set dependency
+    REQUIRE(ts_cache.Set(*from_dir, *to_dir));
+
+    // Obtain value
+    REQUIRE(ts_cache.Get(*from_dir) == *to_dir);
+
+    // Reseting dependency fails and the entry doesn't get overwritten:
+    REQUIRE_FALSE(ts_cache.Set(*from_dir, ArtifactDigest{}));
+    REQUIRE(ts_cache.Get(*from_dir) == *to_dir);
+
+    // Rotate generations
+    REQUIRE(GarbageCollector::TriggerGarbageCollection(storage_config.Get()));
+
+    auto const youngest = Generation::Create(&storage_config.Get(), 0);
+    // Check there's no entry in the youngest generation:
+    CHECK_FALSE(youngest.CAS().TreePath(*from_dir).has_value());
+    CHECK_FALSE(youngest.CAS().TreePath(*to_dir).has_value());
+
+    // Obtain value one more time and check uplinking has happened:
+    REQUIRE(ts_cache.Get(*from_dir) == *to_dir);
+    CHECK(youngest.CAS().TreePath(*from_dir).has_value());
+    CHECK(youngest.CAS().TreePath(*to_dir).has_value());
+}
+
+namespace {
+[[nodiscard]] auto CreateDirectory(std::filesystem::path const& directory,
+                                   Storage const& storage) {
+    BazelMsgFactory::FileStoreFunc store_file =
+        [&storage](std::filesystem::path const& path,
+                   bool is_exec) -> std::optional<ArtifactDigest> {
+        return storage.CAS().StoreBlob(path, is_exec);
+    };
+
+    BazelMsgFactory::TreeStoreFunc store_tree =
+        [&storage](
+            std::string const& content) -> std::optional<ArtifactDigest> {
+        return storage.CAS().StoreTree(content);
+    };
+
+    BazelMsgFactory::SymlinkStoreFunc store_symlink =
+        [&storage](
+            std::string const& content) -> std::optional<ArtifactDigest> {
+        return storage.CAS().StoreBlob(content, /*is_executable=*/false);
+    };
+
+    return BazelMsgFactory::CreateGitTreeDigestFromLocalTree(
+        directory, store_file, store_tree, store_symlink);
+}
+
+[[nodiscard]] auto CreateFlatTestDirectory(StorageConfig const& storage_config,
+                                           Storage const& storage,
+                                           std::uintmax_t entries)
+    -> std::optional<ArtifactDigest> {
+    auto tree = storage_config.CreateTypedTmpDir("tree");
+    if (not tree or
+        not LargeObjectUtils::GenerateDirectory(tree->GetPath(), entries)) {
+        return std::nullopt;
+    }
+    return CreateDirectory(tree->GetPath(), storage);
+}
+}  // namespace
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