cpp-json/test/json_binder_value_int.t.h

//
//  json_binder_value_int.t.h
//  json
//
//  Created by Sam Jaffe on 2/24/17.
//

#pragma once

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

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

class json_binder_value_int_TestSuite : public CxxTest::TestSuite {
public:
  void test_bind_to_integer_type() {
    char data[] = "100";
    int out = 0;
    value_binder<int> binder{};
    parse(bind(out, binder), data, allow_all);
    TS_ASSERT_EQUALS(out, 100);
  }
  
  void test_negative_into_unsigned_throws() {
    char data[] = "-1";
    unsigned int out = 0;
    value_binder<unsigned int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_exception);
  }
  
  void test_empty_buffer_to_int_throws() {
    char data[] = "";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::unterminated_json_exception);
    TS_ASSERT_EQUALS(out, 0);
  }
  
  void test_non_integral_to_int_throws() {
    char data[] = "one";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_exception);
  }
  
  void test_oversized_int_throws() {
    char data[] = "1000000000000";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_exception);
    TS_ASSERT_EQUALS(out, 0);
  }
  
  void test_unsigned_int_downcast_to_int_throws() {
    char data[] = "2147483648";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_width_exception);
    TS_ASSERT_EQUALS(out, 0);
  }

  void test_signed_int_max_parses() {
    char data[] = "2147483647";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS_NOTHING(parse(bind(out, binder), data, allow_all));
  }

  void test_signed_int_min_parses() {
    char data[] = "-2147483648";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS_NOTHING(parse(bind(out, binder), data, allow_all));
  }

  void test_signed_int_under_min_throws() {
    char data[] = "-2147483649";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_width_exception);
  }

  void test_parsing_short_will_error_over_narrowing_max() {
    char data[] = "32768";
    short out = 0;
    value_binder<short> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_width_exception);
    TS_ASSERT_EQUALS(out, 0);
  }
  
  void test_parsing_short_will_error_over_narrowing_min() {
    char data[] = "-32769";
    short out = 0;
    value_binder<short> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_width_exception);
  }

  void test_double_to_int_throws() {
    char data[] = "2.0";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_exception);
    TS_ASSERT_EQUALS(out, 0);
  }
    
  void test_parse_hexadecimal_number() {
    char data[] = "0xF";
    int out = 0;
    value_binder<int> binder{};
    parse(bind(out, binder), data, allow_all);
    TS_ASSERT_EQUALS(out, 15);
  }
  
  void test_parse_hexadecimal_number_out_of_bounds() {
    char data[] = "0x100000000";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_exception);
  }

  void test_parse_octal_number() {
    char data[] = "010";
    int out = 0;
    value_binder<int> binder{};
    parse(bind(out, binder), data, allow_all);
    TS_ASSERT_EQUALS(out, 8);
  }
  
  void test_parse_octal_number_out_of_bounds() {
    char data[] = "040000000000";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data, allow_all),
                     json::json_numeric_exception);
  }

  void test_output_from_integer_type() {
    std::string const expected = "100";
    std::stringstream ss;
    int const in = 100;
    value_binder<int> binder{};
    write(bind(in, binder), ss);
    TS_ASSERT_EQUALS(ss.str(), expected);
  }
  
  void test_unsigned_integer_output() {
    std::string const expected = "2147483648";
    std::stringstream ss;
    unsigned int const in = 2147483648;
    value_binder<unsigned int> binder{};
    write(bind(in, binder), ss);
    TS_ASSERT_EQUALS(ss.str(), expected);
  }
  
  void test_signed_integer_output() {
    std::string const expected = "-2147483648";
    std::stringstream ss;
    int const in = -2147483648;
    value_binder<int> binder{};
    write(bind(in, binder), ss);
    TS_ASSERT_EQUALS(ss.str(), expected);
  }
};