cpp-json/json_binder_tuple.t.h

//
//  json_binder_tuple.t.h
//  json
//
//  Created by Sam Jaffe on 2/26/17.
//

#pragma once

#include <cxxtest/TestSuite.h>
#include "json_binder.hpp"

using namespace json::binder;
using namespace json::parser;

class json_binder_tuple_TestSuite : public CxxTest::TestSuite {
public:
  void test_bind_to_tuple() {
    char data[] = "[ 1, 2 ]";
    using tuple = std::tuple<int, int>;
    tuple out = std::make_tuple(0, 0);
    auto binder = tuple_binder<std::tuple<int, int>>()
      (get_binder<tuple, 0>())
      (get_binder<tuple, 1>());
    parse(json::binder::bind(out, binder), data, allow_all);
    TS_ASSERT_EQUALS(out, std::make_tuple(1, 2));
  }
  
  void test_bind_to_tuple_throws_if_missing_entry() {
    char data[] = "[ 1 ]";
    using tuple = std::tuple<int, int>;
    tuple out = std::make_tuple(0, 0);
    auto binder = tuple_binder<std::tuple<int, int>>()
      (get_binder<tuple, 0>())
      (get_binder<tuple, 1>());
    TS_ASSERT_THROWS(parse(json::binder::bind(out, binder), data, allow_all),
                     json::malformed_json_exception);
    TS_ASSERT_EQUALS(out, std::make_tuple(1, 0));
  }

  void test_bind_to_tuple_throws_if_too_many_entries() {
    char data[] = "[ 1, 2, 3 ]";
    using tuple = std::tuple<int, int>;
    tuple out = std::make_tuple(0, 0);
    auto binder = tuple_binder<std::tuple<int, int>>()
      (get_binder<tuple, 0>())
      (get_binder<tuple, 1>());
    TS_ASSERT_THROWS(parse(json::binder::bind(out, binder), data, allow_all),
                     json::malformed_json_exception);
    TS_ASSERT_EQUALS(out, std::make_tuple(1, 2));
  }
};