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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 CHROME_BROWSER_PERMISSIONS_TEST_MOCK_PASSAGE_EMBEDDER_H_
#define CHROME_BROWSER_PERMISSIONS_TEST_MOCK_PASSAGE_EMBEDDER_H_
#include <string>
#include <vector>
#include "base/run_loop.h"
#include "components/passage_embeddings/passage_embeddings_test_util.h"
namespace test {
class PassageEmbedderMock : public passage_embeddings::TestEmbedder {
public:
PassageEmbedderMock() = default;
~PassageEmbedderMock() override = default;
// passage_embeddings::TestEmbedder:
passage_embeddings::Embedder::TaskId ComputePassagesEmbeddings(
passage_embeddings::PassagePriority priority,
std::vector<std::string> passages,
ComputePassagesEmbeddingsCallback callback) override;
void set_status(passage_embeddings::ComputeEmbeddingsStatus status);
private:
passage_embeddings::ComputeEmbeddingsStatus status_ =
passage_embeddings::ComputeEmbeddingsStatus::kSuccess;
};
// A mock that simulates a delayed execution of passage embeddings computation.
// This is useful for testing asynchronous client code, for example timeout
// logic. The computation is not executed upon calling
// `ComputePassagesEmbeddings`, but is rather stored. It can be invoked later
// by calling `ReleaseCallback`.
class DelayedPassageEmbedderMock : public PassageEmbedderMock {
public:
DelayedPassageEmbedderMock();
~DelayedPassageEmbedderMock() override;
// passage_embeddings::TestEmbedder:
// Overrides the base class implementation to simulate a delay. Instead of
// computing the embeddings, it captures the arguments and the callback. The
// actual computation (in this case a fake) is deferred until
// `ReleaseCallback` is called.
passage_embeddings::Embedder::TaskId ComputePassagesEmbeddings(
passage_embeddings::PassagePriority priority,
std::vector<std::string> passages,
ComputePassagesEmbeddingsCallback callback) override;
// Executes the pending embeddings computation. This will run the stored
// callback and block until the entire asynchronous flow is complete.
// This is necessary because the passage_embeddings::TestEmbedder uses a
// task_runner internally to simulate an async model execution.
void ReleaseCallback();
private:
// A wrapper for the `ComputePassagesEmbeddingsCallback`. This is invoked when
// the underlying `PassageEmbedderMock` completes its computation. It forwards
// the results to the original callback and quits the run loop to unblock the
// test execution that called `ReleaseCallback`.
void ComputePassageEmbeddingsCallbackWrapper(
std::vector<std::string> passages,
std::vector<passage_embeddings::Embedding> embeddings,
TaskId task_id,
passage_embeddings::ComputeEmbeddingsStatus status);
// An internal helper method that is bound as a callback and executed when
// `ReleaseCallback` is called. It initiates the fake computation by calling
// the base class's `ComputePassagesEmbeddings`.
void OnCallbackReleased(passage_embeddings::PassagePriority priority,
std::vector<std::string> passages,
ComputePassagesEmbeddingsCallback callback);
// Stores the pending computation, which is a call to `OnCallbackReleased`
// with all the necessary parameters. It is set in
// `ComputePassagesEmbeddings` and run in `ReleaseCallback`.
base::OnceCallback<void()> execution_callback_;
// Stores the original callback from the `ComputePassagesEmbeddings` call, so
// it can be invoked later when the computation is unblocked.
ComputePassagesEmbeddingsCallback compute_embeddings_callback_;
// A run loop used to make the asynchronous execution behave synchronously for
// tests. `ReleaseCallback` runs this loop, and
// `ComputePassageEmbeddingsCallbackWrapper` quits it.
base::RunLoop model_execute_run_loop_for_testing_;
// Used for creating the execution_callback_.
base::WeakPtrFactory<DelayedPassageEmbedderMock> weak_ptr_factory_{this};
};
} // namespace test
#endif // CHROME_BROWSER_PERMISSIONS_TEST_MOCK_PASSAGE_EMBEDDER_H_
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