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/base.test.h

@@ -0,0 +1,54 @@
+// Copyright (c) 2022, The Monero Project
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#include <cstdint>
+#include <cstring>
+#include <type_traits>
+#include "wire/traits.h"
+
+namespace lws_test
+{
+  struct small_blob { std::uint8_t buf[4]; };
+  constexpr const small_blob blob_test1{{0x00, 0xFF, 0x22, 0x11}};
+  constexpr const small_blob blob_test2{{0x11, 0x7F, 0x7E, 0x80}};
+  constexpr const small_blob blob_test3{{0xDE, 0xAD, 0xBE, 0xEF}};
+
+  inline bool operator==(const small_blob& lhs, const small_blob& rhs)
+  {
+    return std::memcmp(lhs.buf, rhs.buf, sizeof(lhs.buf)) == 0;
+  }
+}
+
+namespace wire
+{
+  template<>
+  struct is_blob<lws_test::small_blob>
+    : std::true_type
+  {};
+}