main.cpp

/*
Permission to use, copy, modify, and/or distribute this software for any purpose
with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.
*/

#include "nofmt/join.h"

#include <array>
#include <cstdint>
#include <iostream>
#include <list>
#include <vector>

bool test_string_equal(std::string_view expected,
                       std::string_view expression,
                       std::string_view actual) {
  if (const auto expectedEval = (expected); actual != expectedEval) {
    std::cerr << "Test failure:" << std::endl;
    std::cerr << "  Expression: " << expression << std::endl;
    std::cerr << "  Expected:   " << expectedEval << std::endl;
    std::cerr << "  Actual:     " << actual << std::endl;
    return false;
  }
  return true;
}

#define TEST_STREQ(expected, expression) \
  test_string_equal((expected), #expression, (expression))

int main() {
  bool result = true;

  using nofmt::join;

  // Plain string concatenation, like python's str.join
  result &= TEST_STREQ("", std::format("{}", join(std::vector<int>{}, "+")));
  result &= TEST_STREQ("1", std::format("{}", join(std::vector<int>{1}, "+")));
  result &=
      TEST_STREQ("1+2", std::format("{}", join(std::vector<int>{1, 2}, "+")));

  // Formatting the values before they're concatenated
  const float floatArray[]{0.3f, 3.14f, 1.618f};
  result &= TEST_STREQ("0.30, 3.14, 1.62",
                       std::format("{:.2f}", join(floatArray, ", ")));

  // Works with all standard sequence containers
  const std::array<uint8_t, 6> macAddress{0x0A, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF};
  result &= TEST_STREQ("0A:BB:CC:DD:EE:FF",
                       std::format("{:02X}", join(macAddress, ":")));
  const std::list<std::string> messages{"hello", "world", "!"};
  result &=
      TEST_STREQ("hello\nworld\n!", std::format("{}", join(messages, "\n")));

  // As well as iterator pairs.
  const std::vector<int> someValues{10, 20, 30, 40, 50};
  result &= TEST_STREQ(
      "40, 50",
      std::format("{}", join(someValues.begin() + 3, someValues.end(), ", ")));

  return result ? EXIT_SUCCESS : EXIT_FAILURE;
}