Added unit tests, and fixed two bugs: (#53)

* Integer conversion checks in src/wire/read.h
 * Missing "boolean" function in wire::writer and derived types

tests/unit/wire/json/read.write.test.cpp

@@ -0,0 +1,109 @@
+
+#include "framework.test.h"
+
+#include <boost/core/demangle.hpp>
+#include <boost/range/algorithm/equal.hpp>
+#include <cstdint>
+#include <type_traits>
+#include "wire/traits.h"
+#include "wire/json/base.h"
+#include "wire/json/read.h"
+#include "wire/json/write.h"
+#include "wire/vector.h"
+
+#include "wire/base.test.h"
+
+namespace
+{
+  constexpr const char basic_string[] = u8"my_string_data";
+  constexpr const char basic_json[] =
+    u8"{\"utf8\":\"my_string_data\",\"vec\":[0,127],\"data\":\"00ff2211\",\"choice\":true}";
+
+  template<typename T>
+  struct basic_object
+  {
+    std::string utf8;
+    std::vector<T> vec;
+    lws_test::small_blob data;
+    bool choice;
+  };
+
+  template<typename F, typename T>
+  void basic_object_map(F& format, T& self)
+  {
+    wire::object(format, WIRE_FIELD(utf8), WIRE_FIELD(vec), WIRE_FIELD(data), WIRE_FIELD(choice));
+  }
+
+  template<typename T>
+  void read_bytes(wire::json_reader& source, basic_object<T>& dest)
+  { basic_object_map(source, dest); }
+
+  template<typename T>
+  void write_bytes(wire::json_writer& dest, const basic_object<T>& source)
+  { basic_object_map(dest, source); }
+
+  template<typename T>
+  void test_basic_reading(lest::env& lest_env)
+  {
+    SETUP("Basic values with " + boost::core::demangle(typeid(T).name()) + " integers")
+    {
+      const auto result =
+        wire::json::from_bytes<basic_object<T>>(std::string{basic_json});
+      EXPECT(result);
+      EXPECT(result->utf8 == basic_string);
+      {
+        const std::vector<T> expected{0, 127};
+        EXPECT(result->vec == expected);
+      }
+      EXPECT(result->data == lws_test::blob_test1);
+      EXPECT(result->choice);
+    }
+  }
+
+  template<typename T>
+  void test_basic_writing(lest::env& lest_env)
+  {
+    SETUP("Basic values with " + boost::core::demangle(typeid(T).name()) + " integers")
+    {
+      const basic_object<T> val{basic_string, std::vector<T>{0, 127}, lws_test::blob_test1, true};
+      const auto result = wire::json::to_bytes(val);
+      EXPECT(boost::range::equal(result, std::string{basic_json}));
+    }
+  }
+}
+
+LWS_CASE("wire::json_reader")
+{
+  using i64_limit = std::numeric_limits<std::int64_t>;
+  static constexpr const char negative_number[] = "-1";
+
+  test_basic_reading<std::int16_t>(lest_env);
+  test_basic_reading<std::int32_t>(lest_env);
+  test_basic_reading<std::int64_t>(lest_env);
+  test_basic_reading<std::intmax_t>(lest_env);
+  test_basic_reading<std::uint16_t>(lest_env);
+  test_basic_reading<std::uint32_t>(lest_env);
+  test_basic_reading<std::uint64_t>(lest_env);
+  test_basic_reading<std::uintmax_t>(lest_env);
+
+  static_assert(0 < i64_limit::max(), "expected 0 < int64_t::max");
+  static_assert(
+    i64_limit::max() <= std::numeric_limits<std::uintmax_t>::max(),
+    "expected int64_t::max <= uintmax_t::max"
+  );
+  std::string big_number = std::to_string(std::uintmax_t(i64_limit::max()) + 1);
+  EXPECT(wire::json::from_bytes<std::uint64_t>(negative_number) == wire::error::schema::larger_integer);
+  EXPECT(wire::json::from_bytes<std::int64_t>(std::move(big_number)) == wire::error::schema::smaller_integer);
+}
+
+LWS_CASE("wire::json_writer")
+{
+  test_basic_writing<std::int16_t>(lest_env);
+  test_basic_writing<std::int32_t>(lest_env);
+  test_basic_writing<std::int64_t>(lest_env);
+  test_basic_writing<std::intmax_t>(lest_env);
+  test_basic_writing<std::uint16_t>(lest_env);
+  test_basic_writing<std::uint32_t>(lest_env);
+  test_basic_writing<std::uint64_t>(lest_env);
+  test_basic_writing<std::uintmax_t>(lest_env);
+}