bind_objc_block_unittest_arc.mm

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#import "base/mac/bind_objc_block.h"

#include <string>

#include "base/bind.h"
#include "base/callback.h"
#include "base/callback_helpers.h"
#include "testing/gtest/include/gtest/gtest.h"

#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif

// This free-function is there to ensure that the object file in not discarded
// at link time when building with gyp (it is required because targets is built
// as a static library with gyp and not source set which cause the object file
// to be discarded if no symbol is used). Remove once gyp support is dropped.
void BindObjcBlockUnittestArcLinkerWorkaround() {}

namespace {

TEST(BindObjcBlockTestARC, TestScopedClosureRunnerExitScope) {
  int run_count = 0;
  int* ptr = &run_count;
  {
    base::ScopedClosureRunner runner(base::BindBlock(^{
        (*ptr)++;
    }));
    EXPECT_EQ(0, run_count);
  }
  EXPECT_EQ(1, run_count);
}

TEST(BindObjcBlockTestARC, TestScopedClosureRunnerRelease) {
  int run_count = 0;
  int* ptr = &run_count;
  base::Closure c;
  {
    base::ScopedClosureRunner runner(base::BindBlock(^{
        (*ptr)++;
    }));
    c = runner.Release();
    EXPECT_EQ(0, run_count);
  }
  EXPECT_EQ(0, run_count);
  c.Run();
  EXPECT_EQ(1, run_count);
}

TEST(BindObjcBlockTestARC, TestReturnValue) {
  const int kReturnValue = 42;
  base::Callback<int(void)> c = base::BindBlock(^{return kReturnValue;});
  EXPECT_EQ(kReturnValue, c.Run());
}

TEST(BindObjcBlockTestARC, TestArgument) {
  const int kArgument = 42;
  base::Callback<int(int)> c = base::BindBlock(^(int a){return a + 1;});
  EXPECT_EQ(kArgument + 1, c.Run(kArgument));
}

TEST(BindObjcBlockTestARC, TestTwoArguments) {
  std::string result;
  std::string* ptr = &result;
  base::Callback<void(const std::string&, const std::string&)> c =
      base::BindBlock(^(const std::string& a, const std::string& b) {
          *ptr = a + b;
      });
  c.Run("forty", "two");
  EXPECT_EQ(result, "fortytwo");
}

TEST(BindObjcBlockTestARC, TestThreeArguments) {
  std::string result;
  std::string* ptr = &result;
  base::Callback<void(const std::string&,
                      const std::string&,
                      const std::string&)> c =
      base::BindBlock(^(const std::string& a,
                        const std::string& b,
                        const std::string& c) {
          *ptr = a + b + c;
      });
  c.Run("six", "times", "nine");
  EXPECT_EQ(result, "sixtimesnine");
}

TEST(BindObjcBlockTestARC, TestSixArguments) {
  std::string result1;
  std::string* ptr = &result1;
  int result2;
  int* ptr2 = &result2;
  base::Callback<void(int, int, const std::string&, const std::string&,
                      int, const std::string&)> c =
      base::BindBlock(^(int a, int b, const std::string& c,
                        const std::string& d, int e, const std::string& f) {
          *ptr = c + d + f;
          *ptr2 = a + b + e;
      });
  c.Run(1, 2, "infinite", "improbability", 3, "drive");
  EXPECT_EQ(result1, "infiniteimprobabilitydrive");
  EXPECT_EQ(result2, 6);
}

}  // namespace