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74 lines
2.5 KiB
74 lines
2.5 KiB
// |
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// Copyright (C) 2014 The Android Open Source Project |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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#ifndef UPDATE_ENGINE_UPDATE_MANAGER_FAKE_VARIABLE_H_ |
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#define UPDATE_ENGINE_UPDATE_MANAGER_FAKE_VARIABLE_H_ |
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#include <memory> |
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#include <string> |
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#include "update_engine/update_manager/variable.h" |
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namespace chromeos_update_manager { |
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// A fake typed variable to use while testing policy implementations. The |
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// variable can be instructed to return any object of its type. |
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template<typename T> |
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class FakeVariable : public Variable<T> { |
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public: |
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FakeVariable(const std::string& name, VariableMode mode) |
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: Variable<T>(name, mode) {} |
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FakeVariable(const std::string& name, base::TimeDelta poll_interval) |
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: Variable<T>(name, poll_interval) {} |
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~FakeVariable() override {} |
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// Sets the next value of this variable to the passed |p_value| pointer. Once |
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// returned by GetValue(), the pointer is released and has to be set again. |
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// A value of null means that the GetValue() call will fail and return |
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// null. |
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void reset(const T* p_value) { |
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ptr_.reset(p_value); |
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} |
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// Make the NotifyValueChanged() public for FakeVariables. |
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void NotifyValueChanged() { |
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Variable<T>::NotifyValueChanged(); |
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} |
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protected: |
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// Variable<T> overrides. |
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// Returns the pointer set with reset(). The ownership of the object is passed |
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// to the caller and the pointer is release from the FakeVariable. A second |
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// call to GetValue() without reset() will return null and set the error |
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// message. |
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const T* GetValue(base::TimeDelta /* timeout */, |
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std::string* errmsg) override { |
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if (ptr_ == nullptr && errmsg != nullptr) |
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*errmsg = this->GetName() + " is an empty FakeVariable"; |
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// Passes the pointer ownership to the caller. |
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return ptr_.release(); |
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} |
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private: |
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// The pointer returned by GetValue(). |
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std::unique_ptr<const T> ptr_; |
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DISALLOW_COPY_AND_ASSIGN(FakeVariable); |
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}; |
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} // namespace chromeos_update_manager |
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#endif // UPDATE_ENGINE_UPDATE_MANAGER_FAKE_VARIABLE_H_
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