first set of changes

src/doctest/protocol/Serializer.cpp

@@ -0,0 +1,48 @@
+#include <xrpl/protocol/Serializer.h>
+
+#include <doctest/doctest.h>
+
+#include <limits>
+
+using namespace xrpl;
+
+TEST_SUITE_BEGIN("Serializer");
+
+TEST_CASE("Serializer add32/geti32")
+{
+    std::initializer_list<std::int32_t> const values = {
+        std::numeric_limits<std::int32_t>::min(),
+        -1,
+        0,
+        1,
+        std::numeric_limits<std::int32_t>::max()};
+    for (std::int32_t value : values)
+    {
+        Serializer s;
+        s.add32(value);
+        CHECK(s.size() == 4);
+        SerialIter sit(s.slice());
+        CHECK(sit.geti32() == value);
+    }
+}
+
+TEST_CASE("Serializer add64/geti64")
+{
+    std::initializer_list<std::int64_t> const values = {
+        std::numeric_limits<std::int64_t>::min(),
+        -1,
+        0,
+        1,
+        std::numeric_limits<std::int64_t>::max()};
+    for (std::int64_t value : values)
+    {
+        Serializer s;
+        s.add64(value);
+        CHECK(s.size() == 8);
+        SerialIter sit(s.slice());
+        CHECK(sit.geti64() == value);
+    }
+}
+
+TEST_SUITE_END();
+