cpp-json/test/json_binder_value_int_test.cxx

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

#include "json/json_binder.hpp"
#include <gmock/gmock.h>

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

TEST(JsonBinderIntTest, ParsesSuccessfully) {
  char data[] = "100";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_NO_THROW(parse(bind(out, binder), data, allow_all));
  EXPECT_THAT(out, 100);
}

TEST(JsonBinderIntTest, ThrowsWhenDomainMismatch) {
  char data[] = "-1";
  unsigned int out = 0;
  value_binder<unsigned int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_exception);
}

TEST(JsonBinderIntTest, ThrowsOnEOB) {
  char data[] = "";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::unterminated_json_exception);
}

TEST(JsonBinderIntTest, ThrowsOnNaN) {
  char data[] = "one";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_exception);
}

TEST(JsonBinderIntTest, ThrowsOnOOB) {
  char data[] = "1000000000000";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_exception);
  EXPECT_THAT(out, 0);
}

TEST(JsonBinderIntTest, ThrowsWhenNarrowing) {
  char data[] = "2147483648";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_width_exception);
  EXPECT_THAT(out, 0);
}

TEST(JsonBinderIntTest, ThrowsWhenNarrowingNegative) {
  char data[] = "-2147483649";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_width_exception);
}

TEST(JsonBinderShortTest, ThrowsWhenNarrowing) {
  char data[] = "32768";
  short out = 0;
  value_binder<short> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_width_exception);
  EXPECT_THAT(out, 0);
}

TEST(JsonBinderShortTest, ThrowsWhenNarrowingNegative) {
  char data[] = "-32769";
  short out = 0;
  value_binder<short> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_width_exception);
}

TEST(JsonBinderIntTest, CanParseMaxInt) {
  char data[] = "2147483647";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_NO_THROW(parse(bind(out, binder), data, allow_all));
}

TEST(JsonBinderIntTest, CanParseMinInt) {
  char data[] = "-2147483648";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_NO_THROW(parse(bind(out, binder), data, allow_all));
}

TEST(JsonBinderIntTest, ThrowsWhenGivenFloatingPoint) {
  char data[] = "2.0";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_exception);
  EXPECT_THAT(out, 0);
}

TEST(JsonBinderIntTest, CanParseHex) {
  char data[] = "0xF";
  int out = 0;
  value_binder<int> binder{};
  parse(bind(out, binder), data, allow_all);
  EXPECT_THAT(out, 15);
}

TEST(JsonBinderIntTest, ThrowsWhenNarrowingHex) {
  char data[] = "0x100000000";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_exception);
}

TEST(JsonBinderIntTest, CanParseOctal) {
  char data[] = "010";
  int out = 0;
  value_binder<int> binder{};
  parse(bind(out, binder), data, allow_all);
  EXPECT_THAT(out, 8);
}

TEST(JsonBinderIntTest, ThrowsWhenNarrowingOctal) {
  char data[] = "040000000000";
  int out = 0;
  value_binder<int> binder{};
  EXPECT_THROW(parse(bind(out, binder), data, allow_all),
               json::json_numeric_exception);
}

// TODO Parametrize this
TEST(JsonBinderIntTest, WritesSuccessfully) {
  std::string const expected = "100";
  std::stringstream ss;
  int const in = 100;
  value_binder<int> binder{};
  write(bind(in, binder), ss);
  EXPECT_THAT(ss.str(), expected);
}

TEST(JsonBinderIntTest, CanWriteUnsigned) {
  std::string const expected = "2147483648";
  std::stringstream ss;
  unsigned int const in = 2147483648;
  value_binder<unsigned int> binder{};
  write(bind(in, binder), ss);
  EXPECT_THAT(ss.str(), expected);
}

TEST(JsonBinderIntTest, CanWriteMinInt) {
  std::string const expected = "-2147483648";
  std::stringstream ss;
  int const in = -2147483648;
  value_binder<int> binder{};
  write(bind(in, binder), ss);
  EXPECT_THAT(ss.str(), expected);
}