Release 1.1.0-preview 3 (#6)

Release roll-up snapshot of C#/C++ codebase at version 1.1.0-preview.
This release matches the current shipping nugets.

src/Core/Core.Native.Tests.Unit/Base64UnitTests.cpp

@@ -0,0 +1,75 @@
+// ------------------------------------------------------------
+//  Copyright (c) Microsoft Corporation.  All rights reserved.
+// ------------------------------------------------------------
+
+#include "pch.h"
+#include <array>
+#include <random>
+#include "CppUnitTest.h"
+
+namespace cdb_core_test
+{
+  using namespace std::literals;
+  using Assert = Microsoft::VisualStudio::CppUnitTestFramework::Assert;
+  using Logger = Microsoft::VisualStudio::CppUnitTestFramework::Logger;
+
+  TEST_CLASS(Base64UnitTests)
+  {
+  public:
+
+    template<typename TChar>
+    void Roundtrip()
+    {
+      std::array<byte, 200> bytes{};
+      std::array<byte, 200> bytes2{};
+      std::array<TChar, cdb_core::Base64::GetEncodeRequiredLength(static_cast<uint32_t>(bytes.size()))> chars{};
+
+      std::random_device seedGenerator{};
+      std::mt19937 rand{seedGenerator()};
+      const std::uniform_int_distribution<int> distribution{};
+
+      cdb_core::Span<int> bb = cdb_core::MemoryMarshal::Cast<byte, int>(cdb_core::Span{bytes});
+      for (auto& b : bb)
+      {
+        b = distribution(rand);
+      }
+      std::fill(chars.begin(), chars.end(), '\0');
+
+      cdb_core::Span<TChar> encoded = cdb_core::Base64::Encode(bytes, cdb_core::Span{chars});
+      Logger::WriteMessage(&encoded[0]);
+      cdb_core::Span<byte> decoded = cdb_core::Base64::Decode(cdb_core::ReadOnlySpan{encoded}, cdb_core::Span{bytes2});
+
+      Assert::AreEqual(static_cast<uint32_t>(bytes.size()), decoded.Length());
+      for (uint32_t i = 0; i < decoded.Length(); i++)
+      {
+        Assert::AreEqual(bytes[i], decoded[i]);
+      }
+    }
+
+    /// <summary>
+    /// Tests whether a byte string properly round-trips as Base64 text.
+    /// </summary>
+    TEST_METHOD(RoundtripA)
+    {
+      Roundtrip<char>();
+    }
+
+    /// <summary>
+    /// Tests whether a byte string properly round-trips as Base64 wide text.
+    /// </summary>
+    TEST_METHOD(RoundtripW)
+    {
+      Roundtrip<wchar_t>();
+    }
+  };
+}
+
+// Additional string function for test diagnostics.
+namespace Microsoft::VisualStudio::CppUnitTestFramework
+{
+  template<>
+  inline std::wstring ToString<std::byte>(const std::byte& q)
+  {
+    return cdb_core::make_string(L"{%u}", q);
+  }
+}