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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
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#include <grpc++/support/byte_buffer.h>

#include <cstring>
#include <vector>

#include <grpc++/support/slice.h>
#include <grpc/support/slice.h>
#include <gtest/gtest.h>

namespace grpc {
namespace {

const char* kContent1 = "hello xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
const char* kContent2 = "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy world";

class ByteBufferTest : public ::testing::Test {};

TEST_F(ByteBufferTest, CreateFromSingleSlice) {
  gpr_slice hello = gpr_slice_from_copied_string(kContent1);
  Slice s(hello, Slice::STEAL_REF);
  ByteBuffer buffer(&s, 1);
}

TEST_F(ByteBufferTest, CreateFromVector) {
  gpr_slice hello = gpr_slice_from_copied_string(kContent1);
  gpr_slice world = gpr_slice_from_copied_string(kContent2);
  std::vector<Slice> slices;
  slices.push_back(Slice(hello, Slice::STEAL_REF));
  slices.push_back(Slice(world, Slice::STEAL_REF));
  ByteBuffer buffer(&slices[0], 2);
}

TEST_F(ByteBufferTest, Clear) {
  gpr_slice hello = gpr_slice_from_copied_string(kContent1);
  Slice s(hello, Slice::STEAL_REF);
  ByteBuffer buffer(&s, 1);
  buffer.Clear();
}

TEST_F(ByteBufferTest, Length) {
  gpr_slice hello = gpr_slice_from_copied_string(kContent1);
  gpr_slice world = gpr_slice_from_copied_string(kContent2);
  std::vector<Slice> slices;
  slices.push_back(Slice(hello, Slice::STEAL_REF));
  slices.push_back(Slice(world, Slice::STEAL_REF));
  ByteBuffer buffer(&slices[0], 2);
  EXPECT_EQ(strlen(kContent1) + strlen(kContent2), buffer.Length());
}

bool SliceEqual(const Slice& a, gpr_slice b) {
  if (a.size() != GPR_SLICE_LENGTH(b)) {
    return false;
  }
  for (size_t i = 0; i < a.size(); i++) {
    if (a.begin()[i] != GPR_SLICE_START_PTR(b)[i]) {
      return false;
    }
  }
  return true;
}

TEST_F(ByteBufferTest, Dump) {
  gpr_slice hello = gpr_slice_from_copied_string(kContent1);
  gpr_slice world = gpr_slice_from_copied_string(kContent2);
  std::vector<Slice> slices;
  slices.push_back(Slice(hello, Slice::STEAL_REF));
  slices.push_back(Slice(world, Slice::STEAL_REF));
  ByteBuffer buffer(&slices[0], 2);
  slices.clear();
  buffer.Dump(&slices);
  EXPECT_TRUE(SliceEqual(slices[0], hello));
  EXPECT_TRUE(SliceEqual(slices[1], world));
}

TEST_F(ByteBufferTest, SerializationMakesCopy) {
  gpr_slice hello = gpr_slice_from_copied_string(kContent1);
  gpr_slice world = gpr_slice_from_copied_string(kContent2);
  std::vector<Slice> slices;
  slices.push_back(Slice(hello, Slice::STEAL_REF));
  slices.push_back(Slice(world, Slice::STEAL_REF));
  grpc_byte_buffer* send_buffer = nullptr;
  bool owned = false;
  ByteBuffer buffer(&slices[0], 2);
  slices.clear();
  auto status = SerializationTraits<ByteBuffer, void>::Serialize(
      buffer, &send_buffer, &owned);
  EXPECT_TRUE(status.ok());
  EXPECT_TRUE(owned);
  EXPECT_TRUE(send_buffer != nullptr);
  grpc_byte_buffer_destroy(send_buffer);
}

}  // namespace
}  // namespace grpc

int main(int argc, char** argv) {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}
