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// Copyright 2016 Google 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 "char_model.h"
#include <string>
#include <unordered_map>
#include <unordered_set>
#include "testharness.h"
#include "util.h"
namespace sentencepiece {
namespace character {
namespace {
// Space symbol (U+2581)
#define WS "\xe2\x96\x81"
ModelProto MakeBaseModelProto() {
ModelProto model_proto;
auto *sp1 = model_proto.add_pieces();
auto *sp2 = model_proto.add_pieces();
auto *sp3 = model_proto.add_pieces();
sp1->set_type(ModelProto::SentencePiece::UNKNOWN);
sp1->set_piece("<unk>");
sp2->set_type(ModelProto::SentencePiece::CONTROL);
sp2->set_piece("<s>");
sp3->set_type(ModelProto::SentencePiece::CONTROL);
sp3->set_piece("</s>");
return model_proto;
}
void AddPiece(ModelProto *model_proto, const std::string &piece,
float score = 0.0) {
auto *sp = model_proto->add_pieces();
sp->set_piece(piece);
sp->set_score(score);
}
TEST(ModelTest, EncodeTest) {
ModelProto model_proto = MakeBaseModelProto();
AddPiece(&model_proto, WS, 0.0);
AddPiece(&model_proto, "a", 0.1);
AddPiece(&model_proto, "b", 0.2);
AddPiece(&model_proto, "c", 0.3);
AddPiece(&model_proto, "d", 0.4);
AddPiece(&model_proto, "ABC", 0.4);
model_proto.mutable_pieces(8)->set_type(
ModelProto::SentencePiece::USER_DEFINED);
const Model model(model_proto);
EncodeResult result;
result = model.Encode("");
EXPECT_TRUE(result.empty());
result = model.Encode(WS "a" WS "b" WS "c");
EXPECT_EQ(6, result.size());
EXPECT_EQ(WS, result[0].first);
EXPECT_EQ("a", result[1].first);
EXPECT_EQ(WS, result[2].first);
EXPECT_EQ("b", result[3].first);
EXPECT_EQ(WS, result[4].first);
EXPECT_EQ("c", result[5].first);
result = model.Encode(WS "ab" WS "cd" WS "abc");
EXPECT_EQ(10, result.size());
EXPECT_EQ(WS, result[0].first);
EXPECT_EQ("a", result[1].first);
EXPECT_EQ("b", result[2].first);
EXPECT_EQ(WS, result[3].first);
EXPECT_EQ("c", result[4].first);
EXPECT_EQ("d", result[5].first);
EXPECT_EQ(WS, result[6].first);
EXPECT_EQ("a", result[7].first);
EXPECT_EQ("b", result[8].first);
EXPECT_EQ("c", result[9].first);
// makes a broken utf-8
const std::string broken_utf8 = std::string("あ").substr(0, 1);
result = model.Encode(broken_utf8);
EXPECT_EQ(1, result.size());
EXPECT_EQ(broken_utf8, result[0].first);
// "ABC" is treated as one piece, as it is USER_DEFINED.
result = model.Encode(WS "abABCcd");
EXPECT_EQ(6, result.size());
EXPECT_EQ(WS, result[0].first);
EXPECT_EQ("a", result[1].first);
EXPECT_EQ("b", result[2].first);
EXPECT_EQ("ABC", result[3].first);
EXPECT_EQ("c", result[4].first);
EXPECT_EQ("d", result[5].first);
}
TEST(CharModelTest, NotSupportedTest) {
ModelProto model_proto = MakeBaseModelProto();
const Model model(model_proto);
EXPECT_EQ(NBestEncodeResult(), model.NBestEncode("test", 10));
EXPECT_EQ(EncodeResult(), model.SampleEncode("test", 0.1));
}
} // namespace
} // namespace character
} // namespace sentencepiece
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