YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

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// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

//

// The following only applies to changes made to this file as part of YugaByte development.

//

// Portions Copyright (c) YugaByte, Inc.

//

// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except

// in compliance with the License.  You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software distributed under the License

// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

// or implied.  See the License for the specific language governing permissions and limitations

// under the License.

//

#include <glog/logging.h>

#include <gtest/gtest.h>

#include "yb/gutil/bind.h"

#include "yb/gutil/callback.h"

#include "yb/gutil/macros.h"

namespace yb {

using std::string;

static int Return5() {

  return 5;

}

TEST(CallbackBindTest, TestFreeFunction) {

  Callback<int(void)> func_cb = Bind(&Return5);

  ASSERT_EQ(5, func_cb.Run());

}

class Ref : public RefCountedThreadSafe<Ref> {

 public:

  int Foo() { return 3; }

};

// Simple class that helps with verifying ref counting.

// Not thread-safe.

struct RefCountable {

  RefCountable()

      : refs(0) {

  }

  void AddRef() const {

    refs++;

  }

  void Release() const {

    refs--;

  }

  void Print() const {

    LOG(INFO) << "Hello. Refs: " << refs;

  }

  mutable int refs;

 private:

  DISALLOW_COPY_AND_ASSIGN(RefCountable);

};

TEST(CallbackBindTest, TestClassMethod) {

  scoped_refptr<Ref> ref = new Ref();

  Callback<int(void)> ref_cb = Bind(&Ref::Foo, ref);

  ref = nullptr;

  ASSERT_EQ(3, ref_cb.Run());

}

int ReturnI(int i, const char* str) {

  return i;

}

TEST(CallbackBindTest, TestPartialBind) {

  Callback<int(const char*)> cb = Bind(&ReturnI, 23);

  ASSERT_EQ(23, cb.Run("hello world"));

}

char IncrementChar(std::unique_ptr<char> in) {

  return *in + 1;

}

// Test that the ref counting functionality works.

TEST(CallbackBindTest, TestRefCounting) {

  RefCountable countable;

  {

    ASSERT_EQ(0, countable.refs);

    Closure cb = Bind(&RefCountable::Print, &countable);

    ASSERT_EQ(1, countable.refs);

    cb.Run();

    ASSERT_EQ(1, countable.refs);

  }

  ASSERT_EQ(0, countable.refs);

}

} // namespace yb