#include <sstream>
#include <cstddef>

#include "gtest/gtest.h"
#include "yaml-cpp/ostream_wrapper.h"

namespace {
TEST(OstreamWrapperTest, BufferNoWrite) {
  YAML::ostream_wrapper wrapper;
  EXPECT_STREQ("", wrapper.str());
}

TEST(OstreamWrapperTest, BufferWriteStr) {
  YAML::ostream_wrapper wrapper;
  wrapper.write(std::string("Hello, world"));
  EXPECT_STREQ("Hello, world", wrapper.str());
}

TEST(OstreamWrapperTest, BufferWriteCStr) {
  YAML::ostream_wrapper wrapper;
  wrapper.write("Hello, world");
  EXPECT_STREQ("Hello, world", wrapper.str());
}

TEST(OstreamWrapperTest, StreamNoWrite) {
  std::stringstream stream;
  YAML::ostream_wrapper wrapper(stream);
  EXPECT_STREQ(NULL, wrapper.str());
  EXPECT_EQ("", stream.str());
}

TEST(OstreamWrapperTest, StreamWriteStr) {
  std::stringstream stream;
  YAML::ostream_wrapper wrapper(stream);
  wrapper.write(std::string("Hello, world"));
  EXPECT_STREQ(NULL, wrapper.str());
  EXPECT_EQ("Hello, world", stream.str());
}

TEST(OstreamWrapperTest, StreamWriteCStr) {
  std::stringstream stream;
  YAML::ostream_wrapper wrapper(stream);
  wrapper.write("Hello, world");
  EXPECT_STREQ(NULL, wrapper.str());
  EXPECT_EQ("Hello, world", stream.str());
}

TEST(OstreamWrapperTest, Position) {
  YAML::ostream_wrapper wrapper;
  wrapper.write("Hello, world\n");
  EXPECT_EQ(1, wrapper.row());
  EXPECT_EQ(0, wrapper.col());
  EXPECT_EQ(13, wrapper.pos());
}

TEST(OstreamWrapperTest, Comment) {
  YAML::ostream_wrapper wrapper;
  wrapper.write("Hello, world ");
  wrapper.set_comment();
  EXPECT_TRUE(wrapper.comment());
  wrapper.write("foo");
  EXPECT_TRUE(wrapper.comment());
  wrapper.write("\n");
  EXPECT_FALSE(wrapper.comment());
}
}