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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.
#ifndef COMPONENTS_PASSAGE_EMBEDDINGS_PASSAGE_EMBEDDINGS_TEST_UTIL_H_
#define COMPONENTS_PASSAGE_EMBEDDINGS_PASSAGE_EMBEDDINGS_TEST_UTIL_H_
#include <memory>
#include <string>
#include <vector>
#include "base/observer_list.h"
#include "base/time/time.h"
#include "components/optimization_guide/core/delivery/test_model_info_builder.h"
#include "components/passage_embeddings/passage_embeddings_types.h"
namespace passage_embeddings {
inline constexpr int64_t kEmbeddingsModelVersion = 1l;
inline constexpr size_t kEmbeddingsModelOutputSize = 768ul;
// Returns a model info builder preloaded with valid model info.
optimization_guide::TestModelInfoBuilder GetBuilderWithValidModelInfo();
// Returns valid Embeddings for the given passages.
std::vector<Embedding> ComputeEmbeddingsForPassages(
const std::vector<std::string>& passages);
////////////////////////////////////////////////////////////////////////////////
// An Embedder that generates Embeddings asynchronously.
class TestEmbedder : public Embedder {
public:
TestEmbedder() = default;
~TestEmbedder() override = default;
// Embedder:
TaskId ComputePassagesEmbeddings(
PassagePriority priority,
std::vector<std::string> passages,
ComputePassagesEmbeddingsCallback callback) override;
void ReprioritizeTasks(PassagePriority priority,
const std::set<TaskId>& tasks) override;
bool TryCancel(TaskId task_id) override;
};
////////////////////////////////////////////////////////////////////////////////
// An EmbedderMetadataProvider that notifies the observer immediately with valid
// embedder metadata.
class TestEmbedderMetadataProvider : public EmbedderMetadataProvider {
public:
TestEmbedderMetadataProvider();
~TestEmbedderMetadataProvider() override;
// EmbedderMetadataProvider:
void AddObserver(EmbedderMetadataObserver* observer) override;
void RemoveObserver(EmbedderMetadataObserver* observer) override;
private:
base::ObserverList<EmbedderMetadataObserver> observer_list_;
};
////////////////////////////////////////////////////////////////////////////////
// The TestEnvironment that encapsulates test helper instances.
class TestEnvironment {
public:
TestEnvironment();
~TestEnvironment();
Embedder* embedder() { return embedder_.get(); }
EmbedderMetadataProvider* embedder_metadata_provider() {
return embedder_metadata_provider_.get();
}
private:
std::unique_ptr<TestEmbedder> embedder_;
std::unique_ptr<TestEmbedderMetadataProvider> embedder_metadata_provider_;
};
} // namespace passage_embeddings
#endif // COMPONENTS_PASSAGE_EMBEDDINGS_PASSAGE_EMBEDDINGS_TEST_UTIL_H_
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