// Copyright 2015 The Crashpad Authors. 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 "util/win/command_line.h"

#include <windows.h>
#include <shellapi.h>
#include <sys/types.h>

#include "base/logging.h"
#include "base/macros.h"
#include "base/scoped_generic.h"
#include "gtest/gtest.h"
#include "test/errors.h"
#include "util/win/scoped_local_alloc.h"

namespace crashpad {
namespace test {
namespace {

// Calls AppendCommandLineArgument() for every argument in argv, then calls
// CommandLineToArgvW() to decode the string into a vector again, and compares
// the input and output.
void AppendCommandLineArgumentTest(size_t argc, const wchar_t* const argv[]) {
  std::wstring command_line;
  for (size_t index = 0; index < argc; ++index) {
    AppendCommandLineArgument(argv[index], &command_line);
  }

  int test_argc;
  wchar_t** test_argv = CommandLineToArgvW(command_line.c_str(), &test_argc);

  ASSERT_TRUE(test_argv) << ErrorMessage("CommandLineToArgvW");
  ScopedLocalAlloc test_argv_owner(test_argv);
  ASSERT_EQ(argc, test_argc);

  for (size_t index = 0; index < argc; ++index) {
    EXPECT_STREQ(argv[index], test_argv[index]) << "index " << index;
  }
  EXPECT_FALSE(test_argv[argc]);
}

TEST(CommandLine, AppendCommandLineArgument) {
  // Most of these test cases come from
  // http://blogs.msdn.com/b/twistylittlepassagesallalike/archive/2011/04/23/everyone-quotes-arguments-the-wrong-way.aspx,
  // which was also a reference for the implementation of
  // AppendCommandLineArgument().

  {
    SCOPED_TRACE("simple");

    const wchar_t* const kArguments[] = {
      L"child.exe",
      L"argument 1",
      L"argument 2",
    };
    AppendCommandLineArgumentTest(arraysize(kArguments), kArguments);
  }

  {
    SCOPED_TRACE("path with spaces");

    const wchar_t* const kArguments[] = {
      L"child.exe",
      L"argument1",
      L"argument 2",
      L"\\some\\path with\\spaces",
    };
    AppendCommandLineArgumentTest(arraysize(kArguments), kArguments);
  }

  {
    SCOPED_TRACE("argument with embedded quotation marks");

    const wchar_t* const kArguments[] = {
      L"child.exe",
      L"argument1",
      L"she said, \"you had me at hello\"",
      L"\\some\\path with\\spaces",
    };
    AppendCommandLineArgumentTest(arraysize(kArguments), kArguments);
  }

  {
    SCOPED_TRACE("argument with unbalanced quotation marks");

    const wchar_t* const kArguments[] = {
      L"child.exe",
      L"argument1",
      L"argument\"2",
      L"argument3",
      L"argument4",
    };
    AppendCommandLineArgumentTest(arraysize(kArguments), kArguments);
  }

  {
    SCOPED_TRACE("argument ending with backslash");

    const wchar_t* const kArguments[] = {
      L"child.exe",
      L"\\some\\directory with\\spaces\\",
      L"argument2",
    };
    AppendCommandLineArgumentTest(arraysize(kArguments), kArguments);
  }

  {
    SCOPED_TRACE("empty argument");

    const wchar_t* const kArguments[] = {
      L"child.exe",
      L"",
      L"argument2",
    };
    AppendCommandLineArgumentTest(arraysize(kArguments), kArguments);
  }

  {
    SCOPED_TRACE("funny nonprintable characters");

    const wchar_t* const kArguments[] = {
      L"child.exe",
      L"argument 1",
      L"argument\t2",
      L"argument\n3",
      L"argument\v4",
      L"argument\"5",
      L" ",
      L"\t",
      L"\n",
      L"\v",
      L"\"",
      L" x",
      L"\tx",
      L"\nx",
      L"\vx",
      L"\"x",
      L"x ",
      L"x\t",
      L"x\n",
      L"x\v",
      L"x\"",
      L" ",
      L"\t\t",
      L"\n\n",
      L"\v\v",
      L"\"\"",
      L" \t\n\v\"",
    };
    AppendCommandLineArgumentTest(arraysize(kArguments), kArguments);
  }
}

}  // namespace
}  // namespace test
}  // namespace crashpad