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