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116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_TOOLS_QUIC_TEST_TOOLS_MOCK_EPOLL_SERVER_H_
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#define NET_TOOLS_QUIC_TEST_TOOLS_MOCK_EPOLL_SERVER_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <unordered_map>
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#include <unordered_set>
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#include "base/logging.h"
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#include "base/macros.h"
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#include "net/tools/epoll_server/epoll_server.h"
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#include "testing/gmock/include/gmock/gmock.h"
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namespace net {
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namespace test {
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// Unlike the full MockEpollServer, this only lies about the time but lets
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// fd events operate normally. Usefully when interacting with real backends
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// but wanting to skip forward in time to trigger timeouts.
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class FakeTimeEpollServer : public EpollServer {
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public:
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FakeTimeEpollServer();
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~FakeTimeEpollServer() override;
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// Replaces the EpollServer NowInUsec.
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int64_t NowInUsec() const override;
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void set_now_in_usec(int64_t nius) { now_in_usec_ = nius; }
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// Advances the virtual 'now' by advancement_usec.
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void AdvanceBy(int64_t advancement_usec) {
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set_now_in_usec(NowInUsec() + advancement_usec);
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}
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// Advances the virtual 'now' by advancement_usec, and
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// calls WaitForEventAndExecteCallbacks.
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// Note that the WaitForEventsAndExecuteCallbacks invocation
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// may cause NowInUs to advance beyond what was specified here.
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// If that is not desired, use the AdvanceByExactly calls.
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void AdvanceByAndWaitForEventsAndExecuteCallbacks(int64_t advancement_usec) {
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AdvanceBy(advancement_usec);
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WaitForEventsAndExecuteCallbacks();
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}
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private:
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int64_t now_in_usec_;
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DISALLOW_COPY_AND_ASSIGN(FakeTimeEpollServer);
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};
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class MockEpollServer : public FakeTimeEpollServer {
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public: // type definitions
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using EventQueue = std::unordered_multimap<int64_t, struct epoll_event>;
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MockEpollServer();
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~MockEpollServer() override;
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// time_in_usec is the time at which the event specified
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// by 'ee' will be delivered. Note that it -is- possible
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// to add an event for a time which has already been passed..
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// .. upon the next time that the callbacks are invoked,
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// all events which are in the 'past' will be delivered.
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void AddEvent(int64_t time_in_usec, const struct epoll_event& ee) {
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event_queue_.insert(std::make_pair(time_in_usec, ee));
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}
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// Advances the virtual 'now' by advancement_usec,
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// and ensure that the next invocation of
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// WaitForEventsAndExecuteCallbacks goes no farther than
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// advancement_usec from the current time.
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void AdvanceByExactly(int64_t advancement_usec) {
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until_in_usec_ = NowInUsec() + advancement_usec;
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set_now_in_usec(NowInUsec() + advancement_usec);
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}
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// As above, except calls WaitForEventsAndExecuteCallbacks.
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void AdvanceByExactlyAndCallCallbacks(int64_t advancement_usec) {
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AdvanceByExactly(advancement_usec);
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WaitForEventsAndExecuteCallbacks();
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}
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std::unordered_set<AlarmCB*>::size_type NumberOfAlarms() const {
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return all_alarms_.size();
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}
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protected: // functions
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// These functions do nothing here, as we're not actually
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// using the epoll_* syscalls.
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void DelFD(int fd) const override {}
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void AddFD(int fd, int event_mask) const override {}
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void ModFD(int fd, int event_mask) const override {}
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// Replaces the epoll_server's epoll_wait_impl.
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int epoll_wait_impl(int epfd,
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struct epoll_event* events,
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int max_events,
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int timeout_in_ms) override;
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void SetNonblocking(int fd) override {}
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private: // members
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EventQueue event_queue_;
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int64_t until_in_usec_;
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DISALLOW_COPY_AND_ASSIGN(MockEpollServer);
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};
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} // namespace test
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} // namespace net
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#endif // NET_TOOLS_QUIC_TEST_TOOLS_MOCK_EPOLL_SERVER_H_
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