cpp-json/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_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_output_from_integer_type() {
    std::string expected = "100";
    std::stringstream ss;
    int in = 100;
    value_binder<int> binder{};
    write(bind(in, binder), ss);
    TS_ASSERT_EQUALS(ss.str(), expected);
  }
  
  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_parsing_short_will_error_over_narrowing() {
    char data[] = "100000";
    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_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_whitespace_breaks_parsing_numeric_token() {
    char data[] = "10 0";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS_NOTHING(parse(bind(out, binder), data, allow_all));
    TS_ASSERT_EQUALS(out, 10);
  }
  
  void test_unterminated_input_causes_exception_when_flagged() {
    char data[] = "10 0";
    int out = 0;
    value_binder<int> binder{};
    TS_ASSERT_THROWS(parse(bind(out, binder), data,
                           disable_concatenated_json_bodies),
                     json::malformed_json_exception);
  }  
};