Function test6

src/diskfile_test.cpp:625–735

Testing Read()/Write() where length > maxlength To do this, the functions were modified to take maxlength as a parameter. In production code, the default maxlength is like 2GB, which is too large for fast tests.

// the default maxlength is like 2GB, which is too
// large for fast tests.
int test6() {
  const char *input1_contents = "diskfile_test test6 input1.txt";

  {
    DiskFile diskfile(std::cout, std::cerr);
    if (!diskfile.Create("input1.txt", strlen(input1_contents))) {
      std::cout << "Create failed!" << std::endl;
      return 1;
    }

    if (!diskfile.Write(0, input1_contents, strlen(input1_contents), 2)) {
      std::cout << "Write failed 1" << std::endl;
      return 1;
    }

    diskfile.Close();
  }

  {
    DiskFile diskfile(std::cout, std::cerr);

    if (!diskfile.Open("input1.txt")) {
      std::cout << "Open failed" << std::endl;
      return 1;
    }

    const size_t buffer_len = strlen(input1_contents)+1;  // for end-of-string
    u8 *buffer = new u8[buffer_len];
    // put end-of-string in buffer.
    buffer[buffer_len-1] = '\0';

    if (!diskfile.Read(0, buffer, buffer_len - 1, 2)) {
      std::cout << "Read whole file returned false" << std::endl;
      return 1;
    }

    if (std::string(input1_contents) != (char *) buffer) {
      std::cout << "Read did not read contents correctly" << std::endl;
      std::cout << "read     \"" << buffer << "\"" << std::endl;
      std::cout << "expected \"" << input1_contents << "\"" << std::endl;
      return 1;
    }

    diskfile.Close();

    remove("input1.txt");
  }


  const char *input2_contents = "diskfile_test test6 input2.txt is longer";

  // try again, writing mid-file with different maxlength.
  {
    DiskFile diskfile(std::cout, std::cerr);
    if (!diskfile.Create("input2.txt", strlen(input2_contents))) {
      std::cout << "Create 2 failed." << std::endl;
      return 1;
    }