[Copilot]

Base64::decode returns decoded bytes, but the first Base64Test case was asserting against wchar_t/wstring_view. This updates the test to use char-based buffers and comparisons consistently with the API contract and the rest of the Base64 test coverage.

• Test expectation alignment

  • Replace the VA== decode case’s wide-character buffer with a byte buffer.
  • Compare the decoded result as std::string_view instead of std::wstring_view.

• Scope

  • Keep the change limited to test/Base64Test.cpp.
  • Do not modify Base64 implementation behavior.

constexpr std::string_view kExpectedOutput = "T";
std::array<char, kExpectedLength> output;

REQUIRE(std::string_view(output.data(), written) == kExpectedOutput);

• Fixes Fix char/wchar_t mismatch in Base64Test #102