//===- clang-modernize/IncludeExcludeTest.cpp - IncludeExclude unit tests -===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "common/Utility.h"
#include "Core/IncludeExcludeInfo.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "gtest/gtest.h"
#include <fstream>

TEST(IncludeExcludeTest, ParseString) {
  IncludeExcludeInfo IEManager;
  std::error_code Err = IEManager.readListFromString(
      /*include=*/ "a,b/b2,c/c2,d/../d2/../d3",
      /*exclude=*/ "a/af.cpp,a/a2,b/b2/b2f.cpp,c/c2");

  ASSERT_EQ(Err, std::error_code());

  // If the file does not appear on the include list then it is not safe to
  // transform. Files are not safe to transform by default.
  EXPECT_FALSE(IEManager.isFileIncluded("f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("b/dir/f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("d/f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("d2/f.cpp"));

  // If the file appears on only the include list then it is safe to transform.
  EXPECT_TRUE(IEManager.isFileIncluded("a/f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("a/dir/f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("b/b2/f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("d3/f.cpp"));

  // If the file appears on both the include or exclude list then it is not
  // safe to transform.
  EXPECT_FALSE(IEManager.isFileIncluded("a/af.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("a/a2/f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("a/a2/dir/f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("b/b2/b2f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("c/c2/c3/f.cpp"));

#ifdef LLVM_ON_WIN32
  // Check for cases when the path separators are different between the path
  // that was read and the path that we are checking for. This can happen on
  // windows where lit provides "\" and the test has "/".
  ASSERT_NO_ERROR(IEManager.readListFromString(
        /*include=*/ "C:\\foo,a\\b/c,a/../b\\c/..\\d",
        /*exclude=*/ "C:\\bar"
        ));
  EXPECT_TRUE(IEManager.isFileIncluded("C:/foo/code.h"));
  EXPECT_FALSE(IEManager.isFileIncluded("C:/bar/code.h"));
  EXPECT_TRUE(IEManager.isFileIncluded("a/b\\c/code.h"));
  EXPECT_FALSE(IEManager.isFileIncluded("b\\c/code.h"));
  EXPECT_TRUE(IEManager.isFileIncluded("b/d\\code.h"));
#endif
}

TEST(IncludeExcludeTest, ParseStringCases) {
  IncludeExcludeInfo IEManager;
  std::error_code Err = IEManager.readListFromString(
      /*include=*/  "a/.,b/b2/,c/c2/c3/../../c4/,d/d2/./d3/,/e/e2/.",
      /*exclude=*/ "");

  ASSERT_EQ(Err, std::error_code());

  EXPECT_TRUE(IEManager.isFileIncluded("a/f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("b/b2/f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("c/c4/f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("d/d2/d3/f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("/e/e2/f.cpp"));

  EXPECT_FALSE(IEManager.isFileIncluded("c/c2/c3/f.cpp"));
}

// Utility for creating and filling files with data for IncludeExcludeFileTest
// tests.
struct InputFiles {

  // This function uses fatal assertions. The caller is responsible for making
  // sure fatal assertions propagate.
  void CreateFiles(bool UnixMode) {
    llvm::SmallString<128> Path;
    int FD;

    ASSERT_NO_ERROR(
        llvm::sys::fs::createTemporaryFile("include", "", FD, Path));
    IncludeDataPath = Path.str();
    {
      llvm::raw_fd_ostream IncludeDataFile(FD, true);
      for (unsigned i = 0; i < sizeof(IncludeData) / sizeof(char *); ++i) {
        IncludeDataFile << IncludeData[i] << (UnixMode ? "\n" : "\r\n");
      }
    }

    ASSERT_NO_ERROR(
        llvm::sys::fs::createTemporaryFile("exclude", "", FD, Path));
    ExcludeDataPath = Path.str();
    {
      llvm::raw_fd_ostream ExcludeDataFile(FD, true);
      for (unsigned i = 0; i < sizeof(ExcludeData) / sizeof(char *); ++i) {
        ExcludeDataFile << ExcludeData[i] << (UnixMode ? "\n" : "\r\n");
      }
    }
  }

  static const char *IncludeData[3];
  static const char *ExcludeData[4];

  std::string IncludeDataPath;
  std::string ExcludeDataPath;
};

const char *InputFiles::IncludeData[3] = { "a", "b/b2", "c/c2" };
const char *InputFiles::ExcludeData[4] = { "a/af.cpp", "a/a2", "b/b2/b2f.cpp",
                                           "c/c2" };

TEST(IncludeExcludeFileTest, UNIXFile) {
  InputFiles UnixFiles;
  ASSERT_NO_FATAL_FAILURE(UnixFiles.CreateFiles(/* UnixMode= */true));

  IncludeExcludeInfo IEManager;
  std::error_code Err = IEManager.readListFromFile(
      UnixFiles.IncludeDataPath.c_str(), UnixFiles.ExcludeDataPath.c_str());

  ASSERT_EQ(Err, std::error_code());

  EXPECT_FALSE(IEManager.isFileIncluded("f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("a/f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("a/af.cpp"));
}

TEST(IncludeExcludeFileTest, DOSFile) {
  InputFiles DOSFiles;
  ASSERT_NO_FATAL_FAILURE(DOSFiles.CreateFiles(/* UnixMode= */false));

  IncludeExcludeInfo IEManager;
  std::error_code Err = IEManager.readListFromFile(
      DOSFiles.IncludeDataPath.c_str(), DOSFiles.ExcludeDataPath.c_str());

  ASSERT_EQ(Err, std::error_code());

  EXPECT_FALSE(IEManager.isFileIncluded("f.cpp"));
  EXPECT_TRUE(IEManager.isFileIncluded("a/f.cpp"));
  EXPECT_FALSE(IEManager.isFileIncluded("a/af.cpp"));
}