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/*
* Copyright 2014 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_SIGSLOTTESTER_H_
#define RTC_BASE_SIGSLOTTESTER_H_
// To generate sigslottester.h from sigslottester.h.pump, execute:
// /home/build/google3/third_party/gtest/scripts/pump.py sigslottester.h.pump
// SigslotTester(s) are utility classes to check if signals owned by an
// object are being invoked at the right time and with the right arguments.
// They are meant to be used in tests. Tests must provide "capture" pointers
// (i.e. address of variables) where the arguments from the signal callback
// can be stored.
//
// Example:
// /* Some signal */
// sigslot::signal1<const std::string&> foo;
//
// /* We want to monitor foo in some test. Note how signal argument is
// const std::string&, but capture-type is std::string. Capture type
// must be type that can be assigned to. */
// std::string capture;
// SigslotTester1<const std::string&, std::string> slot(&foo, &capture);
// foo.emit("hello");
// EXPECT_EQ(1, slot.callback_count());
// EXPECT_EQ("hello", capture);
// /* See unit-tests for more examples */
#include "rtc_base/third_party/sigslot/sigslot.h"
namespace rtc {
// Base version for testing signals that passes no arguments.
class SigslotTester0 : public sigslot::has_slots<> {
public:
explicit SigslotTester0(sigslot::signal0<>* signal) : callback_count_(0) {
signal->connect(this, &SigslotTester0::OnSignalCallback);
}
SigslotTester0(const SigslotTester0&) = delete;
SigslotTester0& operator=(const SigslotTester0&) = delete;
int callback_count() const { return callback_count_; }
private:
void OnSignalCallback() { callback_count_++; }
int callback_count_;
};
// Versions below are for testing signals that pass arguments. For all the
// templates below:
// - A1-A5 is the type of the argument i in the callback. Signals may and often
// do use const-references here for efficiency.
// - C1-C5 is the type of the variable to capture argument i. These should be
// non-const value types suitable for use as lvalues.
$var n = 5
$range i 1..n
$for i [[
$range j 1..i
template <$for j , [[class A$j]], $for j , [[class C$j]]>
class SigslotTester$i : public sigslot::has_slots<> {
public:
SigslotTester$i(sigslot::signal$i<$for j , [[A$j]]>* signal,
$for j , [[C$j* capture$j]])
: callback_count_(0),
$for j , [[capture$j[[]]_(capture$j)]] {
signal->connect(this, &SigslotTester$i::OnSignalCallback);
}
SigslotTester$i(const SigslotTester$i&) = delete;
SigslotTester$i& operator=(const SigslotTester$i&) = delete;
int callback_count() const { return callback_count_; }
private:
void OnSignalCallback($for j , [[A$j arg$j]]) {
callback_count_++;$for j [[
*capture$j[[]]_ = arg$j;]]
}
int callback_count_;$for j [[
C$j* capture$j[[]]_;]]
};
]]
} // namespace rtc
#endif // RTC_BASE_SIGSLOTTESTER_H_
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