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/*
* Copyright 2004 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.
*/
#include "rtc_base/callback.h"
#include "rtc_base/bind.h"
#include "rtc_base/gunit.h"
#include "rtc_base/keep_ref_until_done.h"
#include "rtc_base/refcount.h"
namespace rtc {
namespace {
void f() {}
int g() { return 42; }
int h(int x) { return x * x; }
void i(int& x) { x *= x; } // NOLINT: Testing refs
struct BindTester {
int a() { return 24; }
int b(int x) const { return x * x; }
};
class RefCountedBindTester : public RefCountInterface {
public:
RefCountedBindTester() : count_(0) {}
void AddRef() const override { ++count_; }
RefCountReleaseStatus Release() const override {
--count_;
return count_ == 0 ? RefCountReleaseStatus::kDroppedLastRef
: RefCountReleaseStatus::kOtherRefsRemained;
}
int RefCount() const { return count_; }
private:
mutable int count_;
};
} // namespace
TEST(CallbackTest, VoidReturn) {
Callback0<void> cb;
EXPECT_TRUE(cb.empty());
cb(); // Executing an empty callback should not crash.
cb = Callback0<void>(&f);
EXPECT_FALSE(cb.empty());
cb();
}
TEST(CallbackTest, IntReturn) {
Callback0<int> cb;
EXPECT_TRUE(cb.empty());
cb = Callback0<int>(&g);
EXPECT_FALSE(cb.empty());
EXPECT_EQ(42, cb());
EXPECT_EQ(42, cb());
}
TEST(CallbackTest, OneParam) {
Callback1<int, int> cb1(&h);
EXPECT_FALSE(cb1.empty());
EXPECT_EQ(9, cb1(-3));
EXPECT_EQ(100, cb1(10));
// Try clearing a callback.
cb1 = Callback1<int, int>();
EXPECT_TRUE(cb1.empty());
// Try a callback with a ref parameter.
Callback1<void, int&> cb2(&i);
int x = 3;
cb2(x);
EXPECT_EQ(9, x);
cb2(x);
EXPECT_EQ(81, x);
}
TEST(CallbackTest, WithBind) {
BindTester t;
Callback0<int> cb1 = Bind(&BindTester::a, &t);
EXPECT_EQ(24, cb1());
EXPECT_EQ(24, cb1());
cb1 = Bind(&BindTester::b, &t, 10);
EXPECT_EQ(100, cb1());
EXPECT_EQ(100, cb1());
cb1 = Bind(&BindTester::b, &t, 5);
EXPECT_EQ(25, cb1());
EXPECT_EQ(25, cb1());
}
TEST(KeepRefUntilDoneTest, simple) {
RefCountedBindTester t;
EXPECT_EQ(0, t.RefCount());
{
Callback0<void> cb = KeepRefUntilDone(&t);
EXPECT_EQ(1, t.RefCount());
cb();
EXPECT_EQ(1, t.RefCount());
cb();
EXPECT_EQ(1, t.RefCount());
}
EXPECT_EQ(0, t.RefCount());
}
TEST(KeepRefUntilDoneTest, copy) {
RefCountedBindTester t;
EXPECT_EQ(0, t.RefCount());
Callback0<void> cb2;
{
Callback0<void> cb = KeepRefUntilDone(&t);
EXPECT_EQ(1, t.RefCount());
cb2 = cb;
}
EXPECT_EQ(1, t.RefCount());
cb2 = Callback0<void>();
EXPECT_EQ(0, t.RefCount());
}
TEST(KeepRefUntilDoneTest, scopedref) {
RefCountedBindTester t;
EXPECT_EQ(0, t.RefCount());
{
scoped_refptr<RefCountedBindTester> t_scoped_ref(&t);
Callback0<void> cb = KeepRefUntilDone(t_scoped_ref);
t_scoped_ref = nullptr;
EXPECT_EQ(1, t.RefCount());
cb();
EXPECT_EQ(1, t.RefCount());
}
EXPECT_EQ(0, t.RefCount());
}
} // namespace rtc
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