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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/passage_embeddings/passage_embeddings_test_util.h"
#include "base/path_service.h"
#include "base/task/sequenced_task_runner.h"
#include "components/optimization_guide/core/optimization_guide_proto_util.h"
#include "components/optimization_guide/proto/passage_embeddings_model_metadata.pb.h"
namespace passage_embeddings {
namespace {
inline constexpr uint32_t kEmbeddingsModelInputWindowSize = 256u;
Embedding ComputeEmbeddingForPassage(size_t embeddings_model_output_size) {
constexpr size_t kMockPassageWordCount = 10;
Embedding embedding(std::vector<float>(embeddings_model_output_size, 1.0f));
embedding.Normalize();
embedding.SetPassageWordCount(kMockPassageWordCount);
return embedding;
}
EmbedderMetadata GetValidEmbedderMetadata() {
return EmbedderMetadata(kEmbeddingsModelVersion, kEmbeddingsModelOutputSize);
}
} // namespace
optimization_guide::TestModelInfoBuilder GetBuilderWithValidModelInfo() {
// Get file paths to the test model files.
base::FilePath test_data_dir;
base::PathService::Get(base::DIR_SRC_TEST_DATA_ROOT, &test_data_dir);
test_data_dir = test_data_dir.AppendASCII("components")
.AppendASCII("test")
.AppendASCII("data")
.AppendASCII("passage_embeddings");
// The files only exist to appease the mojo run-time check for null arguments,
// and they are not read by the fake embedder.
base::FilePath embeddings_path = test_data_dir.AppendASCII("fake_model_file");
base::FilePath sp_path = test_data_dir.AppendASCII("fake_model_file");
// Create serialized metadata.
optimization_guide::proto::PassageEmbeddingsModelMetadata model_metadata;
model_metadata.set_input_window_size(kEmbeddingsModelInputWindowSize);
model_metadata.set_output_size(kEmbeddingsModelOutputSize);
// Load a model info builder.
optimization_guide::TestModelInfoBuilder builder;
builder.SetModelFilePath(embeddings_path);
builder.SetAdditionalFiles({sp_path});
builder.SetVersion(kEmbeddingsModelVersion);
builder.SetModelMetadata(optimization_guide::AnyWrapProto(model_metadata));
return builder;
}
std::vector<Embedding> ComputeEmbeddingsForPassages(
const std::vector<std::string>& passages) {
return std::vector<Embedding>(
passages.size(), ComputeEmbeddingForPassage(kEmbeddingsModelOutputSize));
}
////////////////////////////////////////////////////////////////////////////////
Embedder::TaskId TestEmbedder::ComputePassagesEmbeddings(
PassagePriority priority,
std::vector<std::string> passages,
ComputePassagesEmbeddingsCallback callback) {
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(
[](std::vector<std::string> passages,
ComputePassagesEmbeddingsCallback callback) {
std::move(callback).Run(
passages, ComputeEmbeddingsForPassages(passages),
/*task_id=*/0, ComputeEmbeddingsStatus::kSuccess);
},
passages, std::move(callback)));
return 0;
}
void TestEmbedder::ReprioritizeTasks(PassagePriority priority,
const std::set<TaskId>& tasks) {}
bool TestEmbedder::TryCancel(TaskId task_id) {
return false;
}
////////////////////////////////////////////////////////////////////////////////
TestEmbedderMetadataProvider::TestEmbedderMetadataProvider() = default;
TestEmbedderMetadataProvider::~TestEmbedderMetadataProvider() = default;
void TestEmbedderMetadataProvider::AddObserver(
EmbedderMetadataObserver* observer) {
observer->EmbedderMetadataUpdated(GetValidEmbedderMetadata());
observer_list_.AddObserver(observer);
}
void TestEmbedderMetadataProvider::RemoveObserver(
EmbedderMetadataObserver* observer) {
observer_list_.RemoveObserver(observer);
}
////////////////////////////////////////////////////////////////////////////////
TestEnvironment::TestEnvironment()
: embedder_(std::make_unique<TestEmbedder>()),
embedder_metadata_provider_(
std::make_unique<TestEmbedderMetadataProvider>()) {}
TestEnvironment::~TestEnvironment() = default;
} // namespace passage_embeddings
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