text: // Copyright 2010-2021, Google Inc.
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  // in the documentation and/or other materials provided with the
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  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #include "rewriter/user_dictionary_rewriter.h"
  
  #include <cstddef>
  #include <string>
  #include <vector>
  
  #include "base/logging.h"
  #include "base/system_util.h"
  #include "base/util.h"
  #include "converter/segments.h"
  #include "request/conversion_request.h"
  #include "testing/base/public/googletest.h"
  #include "testing/base/public/gunit.h"
  
  namespace mozc {
  
  namespace {
  void AddCandidate(const std::string &value, bool is_user_dictionary,
                    Segments *segments) {
    segments->set_request_type(Segments::CONVERSION);
    Segment *seg = nullptr;
    if (segments->segments_size() == 0) {
      seg = segments->push_back_segment();
      seg->set_key("test");
    } else {
      seg = segments->mutable_segment(0);
    }
    Segment::Candidate *candidate = seg->add_candidate();
    candidate->Init();
    candidate->key = value;
    candidate->content_key = value;
    candidate->value = value;
    candidate->content_value = value;
    if (is_user_dictionary) {
      candidate->attributes |= Segment::Candidate::USER_DICTIONARY;
    }
  }
  
  std::string GetCandidates(const Segments &segments) {
    CHECK_EQ(1, segments.segments_size());
    const Segment &seg = segments.segment(0);
    std::vector<std::string> results;
    for (size_t i = 0; i < seg.candidates_size(); ++i) {
      results.push_back(seg.candidate(i).value);
    }
    std::string result;
    Util::JoinStrings(results, " ", &result);
    return result;
  }
  }  // namespace
  
  class UserDictionaryRewriterTest : public testing::Test {
   protected:
    UserDictionaryRewriterTest() {}
    ~UserDictionaryRewriterTest() override {}
  
    void SetUp() override {
      SystemUtil::SetUserProfileDirectory(FLAGS_test_tmpdir);
    }
  
    void TearDown() override {}
  };
  
  TEST_F(UserDictionaryRewriterTest, RewriteTest) {
    UserDictionaryRewriter rewriter;
    const ConversionRequest request;
  
    {
      Segments segments;
      AddCandidate("1", false, &segments);
      AddCandidate("2", false, &segments);
      AddCandidate("3", false, &segments);
      AddCandidate("4", false, &segments);
      AddCandidate("5", false, &segments);
      EXPECT_FALSE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 2 3 4 5", GetCandidates(segments));
    }
  
    {
      Segments segments;
      AddCandidate("1", true, &segments);
      AddCandidate("2", false, &segments);
      AddCandidate("3", false, &segments);
      AddCandidate("4", false, &segments);
      AddCandidate("5", false, &segments);
      EXPECT_FALSE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 2 3 4 5", GetCandidates(segments));
    }
  
    {
      Segments segments;
      AddCandidate("1", false, &segments);
      AddCandidate("2", true, &segments);
      AddCandidate("3", false, &segments);
      AddCandidate("4", false, &segments);
      AddCandidate("5", false, &segments);
      EXPECT_FALSE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 2 3 4 5", GetCandidates(segments));
    }
  
    {
      Segments segments;
      AddCandidate("1", false, &segments);
      AddCandidate("2", false, &segments);
      AddCandidate("3", true, &segments);
      AddCandidate("4", false, &segments);
      AddCandidate("5", false, &segments);
      EXPECT_TRUE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 3 2 4 5", GetCandidates(segments));
    }
    {
      Segments segments;
      AddCandidate("1", false, &segments);
      AddCandidate("2", false, &segments);
      AddCandidate("3", true, &segments);
      AddCandidate("4", true, &segments);
      AddCandidate("5", false, &segments);
      EXPECT_TRUE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 3 4 2 5", GetCandidates(segments));
    }
    {
      Segments segments;
      AddCandidate("1", false, &segments);
      AddCandidate("2", true, &segments);
      AddCandidate("3", true, &segments);
      AddCandidate("4", true, &segments);
      AddCandidate("5", false, &segments);
      EXPECT_FALSE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 2 3 4 5", GetCandidates(segments));
    }
    {
      Segments segments;
      AddCandidate("1", true, &segments);
      AddCandidate("2", true, &segments);
      AddCandidate("3", true, &segments);
      AddCandidate("4", true, &segments);
      AddCandidate("5", true, &segments);
      EXPECT_FALSE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 2 3 4 5", GetCandidates(segments));
    }
    {
      Segments segments;
      AddCandidate("1", true, &segments);
      AddCandidate("2", false, &segments);
      AddCandidate("3", false, &segments);
      AddCandidate("4", true, &segments);
      AddCandidate("5", false, &segments);
      EXPECT_TRUE(rewriter.Rewrite(request, &segments));
      EXPECT_EQ("1 4 2 3 5", GetCandidates(segments));
    }
  }
  }  // namespace mozc
  