cpp-json/test/json_binder_object.t.h

//
//  json_binder_object.t.h
//  json
//
//  Created by Sam Jaffe on 2/27/17.
//

#pragma once

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

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

class json_binder_object_TestSuite : public CxxTest::TestSuite {
public:
  using vec_t = std::vector<int>;
  using map_t = std::map<std::string, vec_t>;
  struct TestObject {
    int count;
    double average;
    std::map<std::string, std::vector<int>> data;
    bool operator==(TestObject const & other) const {
      return count == other.count && average == other.average && data == other.data;
    }
  };
  
  static object_binder<TestObject> GetImpl() {
    return object_binder<TestObject>()
      ("count", &TestObject::count)
      ("average", &TestObject::average)
      ("data", direct_binder<TestObject, map_t>(&TestObject::data));
  }
  
  static object_binder<TestObject> & Get() {
    static object_binder<TestObject> val = GetImpl();
    return val;
  }
  
  void test_construct_object_from_json() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] }}";
    TestObject out = { 0, 0.0, {} };
    TestObject expected = { 10, 1.0, {{"key1", {1, 2}},{"key2", {3, 4}}} };
    TS_ASSERT_THROWS_NOTHING(parse(json::binder::bind(out, Get()), data, allow_all));
    TS_ASSERT_EQUALS(out, expected);
  }
  
  void test_permits_extra_keys() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] }, \"lemon\":true}";
    TestObject out = { 0, 0.0, {} };
    TestObject expected = { 10, 1.0, {{"key1", {1, 2}},{"key2", {3, 4}}} };
    TS_ASSERT_THROWS_NOTHING(parse(json::binder::bind(out, Get()), data, allow_all));
    TS_ASSERT_EQUALS(out, expected);
  }
  
  void test_throws_on_extra_keys_with_flag() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] }, \"lemon\":true}";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data,
                           disable_unknown_keys),
                     json::malformed_json_exception);
  }
  
  void test_permits_missing_keys() {
    char data[] = "{ \"count\":10, \"average\":1.0 }";
    TestObject out = { 0, 0.0, {} };
    TestObject expected = { 10, 1.0, {} };
    TS_ASSERT_THROWS_NOTHING(parse(json::binder::bind(out, Get()), data, allow_all));
    TS_ASSERT_EQUALS(out, expected);
  }

  void test_throws_if_missing_keys_with_flag() {
    char data[] = "{ \"count\":10, \"average\":1.0 }";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data,
                           disable_missing_keys),
                     json::malformed_json_exception);
  }
  
  void test_throws_if_object_unstarted() {
    char data[] = "\"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] } }";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data, allow_all),
                     json::malformed_json_exception);
  }
  
  void test_throws_if_object_missing_associative_token() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\": }";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data, allow_all),
                     json::malformed_json_exception);
  }

  void test_throws_if_object_unterminated() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] }";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data, allow_all),
                     json::unterminated_json_exception);
  }
  
  void test_throws_if_object_missing_associative_token_discard_t() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] }, \"lemon\":{\"key\": } }";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data, allow_all),
                     json::malformed_json_exception);
  }
  
  void test_throws_if_object_unterminated_array_discard_t() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] }, \"lemon\":[1.0 }";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data, allow_all),
                     json::unterminated_json_exception);
  }

  void test_throws_if_object_unterminated_object_discard_t() {
    char data[] = "{ \"count\":10, \"average\":1.0, \"data\":{ \"key1\":[1, 2], \"key2\":[3, 4] }, \"lemon\":{\"key\":false }";
    TestObject out = { 0, 0.0, {} };
    TS_ASSERT_THROWS(parse(json::binder::bind(out, Get()), data, allow_all),
                     json::unterminated_json_exception);
  }
  
  std::string ify(double value) {
    std::stringstream ss;
    ss << std::fixed << value;
    return ss.str();
  }
  
  void test_write_object_is_composed_of_correct_data() {
    std::string const dbl = ify(1.0);
    std::string const expected = "{\"average\":"+dbl+",\"count\":10,\"data\":{\"key1\":[1,2],\"key2\":[3,4]}}";
    std::stringstream ss;
    TestObject const in = { 10, 1.0, { { "key1", {1, 2} }, { "key2", {3, 4} } } };
    TS_ASSERT_THROWS_NOTHING(write(json::binder::bind(in, Get()), ss));
    TS_ASSERT_EQUALS(ss.str(), expected);
  }
};