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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_PRINTING_FAKE_PRINTER_CONFIG_CACHE_H_
#define CHROMEOS_PRINTING_FAKE_PRINTER_CONFIG_CACHE_H_
#include <string>
#include <string_view>
#include "base/component_export.h"
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/time/clock.h"
#include "chromeos/printing/printer_config_cache.h"
namespace chromeos {
// A FakePrinterConfigCache provides canned responses like a real
// PrinterConfigCache would for testing purposes.
//
// This class doesn't meaningfully populate
// PrinterConfigCache::FetchResult::time_of_fetch.
class COMPONENT_EXPORT(CHROMEOS_PRINTING) FakePrinterConfigCache
: public PrinterConfigCache {
public:
FakePrinterConfigCache();
~FakePrinterConfigCache() override;
// Calls |cb| with a canned response for |key| previously provided by
// SetFetchResponseForTesting().
void Fetch(const std::string& key,
base::TimeDelta unused_expiration,
PrinterConfigCache::FetchCallback cb) override;
// Causes subsequent Fetch() calls for |key| to fail (until a future
// SetFetchResponseForTesting() provides a new canned response).
void Drop(const std::string& key) override;
// Sets internal state of |this| s.t. future Fetch() calls for
// |key| get called back with |value|.
// Subsequent calls to this method override the canned |value|.
void SetFetchResponseForTesting(std::string_view key, std::string_view value);
// Sets internal state of |this| s.t. future Fetch() calls for
// |key| are consumed (i.e. delayed indefinitely and never called
// back). The effects of this are undone by a subsequent call to
// SetFetchResponseForTesting() or to Drop().
//
// This method is useful for simulating a slow server: one that
// doesn't immediately respond to a Fetch() request (in fact, it
// never responds at all, so use this carefully).
void DiscardFetchRequestFor(std::string_view key);
private:
base::flat_map<std::string, std::string> contents_;
base::flat_set<std::string> fetch_requests_to_ignore_;
};
} // namespace chromeos
#endif // CHROMEOS_PRINTING_FAKE_PRINTER_CONFIG_CACHE_H_
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