src/text_utils_test.cc

// Copyright 2026 Google Inc. All Rights Reserved.
//
// 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 "text_utils.h"

#include <string>

#include "test.h"

TEST(TextUtilsTest, StripStringPiece) {
  EXPECT_EQ("abc", StripStringPiece("  abc  "));
  EXPECT_EQ("abc", StripStringPiece("abc"));
  EXPECT_EQ("abc", StripStringPiece("\tabc"));
  EXPECT_EQ("abc", StripStringPiece("abc\r\n"));
  EXPECT_EQ("abc", StripStringPiece("abc\n"));
  EXPECT_EQ("", StripStringPiece("   "));
  EXPECT_EQ("", StripStringPiece(""));
  EXPECT_EQ("a", StripStringPiece(" a "));
}

TEST(TextUtilsTest, TextLineSplitter) {
  std::string input("a\nb\nc\nwith_crlf\r\n  with space  \ntrailing line");
  TextLineSplitter splitter(input);
  StringPiece line;
  EXPECT_TRUE(splitter.GetNextLine(&line));
  EXPECT_EQ("a", line);
  EXPECT_TRUE(splitter.GetNextLine(&line));
  EXPECT_EQ("b", line);
  EXPECT_TRUE(splitter.GetNextLine(&line));
  EXPECT_EQ("c", line);
  EXPECT_TRUE(splitter.GetNextLine(&line));
  EXPECT_EQ("with_crlf", line);
  EXPECT_TRUE(splitter.GetNextLine(&line));
  EXPECT_EQ("  with space  ", line);
  EXPECT_TRUE(splitter.GetNextLine(&line));
  EXPECT_EQ("trailing line", line);
  EXPECT_FALSE(splitter.GetNextLine(&line));
}

TEST(TextUtilsTest, TextFileParser) {
  VirtualFileSystem disk_interface;
  disk_interface.Create(
      "test.txt", "a\nb\nc\n\r\n\nwith_crlf\r\n  with space  \ntrailing line");
  TextFileParser parser(disk_interface);
  std::string error;
  EXPECT_TRUE(parser.Reset("test.txt", &error)) << error;
  EXPECT_EQ("a\nb\nc\n\r\n\nwith_crlf\r\n  with space  \ntrailing line",
            parser.content());
  EXPECT_EQ(6, parser.lines().size());
  EXPECT_EQ("a", parser.lines()[0]);
  EXPECT_EQ("b", parser.lines()[1]);
  EXPECT_EQ("c", parser.lines()[2]);
  EXPECT_EQ("with_crlf", parser.lines()[3]);
  EXPECT_EQ("  with space  ", parser.lines()[4]);
  EXPECT_EQ("trailing line", parser.lines()[5]);
}