WIP: checkpoint geocaching before main integration

modules/core_geocaching/tests/test_capabilities.cpp

@@ -0,0 +1,31 @@
+#include "geocaching/protocol/capabilities.h"
+#include <cassert>
+#include <fstream>
+#include <iterator>
+#include <vector>
+
+int main(int argc, char** argv)
+{
+    assert(argc == 2);
+    std::ifstream file(argv[1], std::ios::binary);
+    assert(file.good());
+    std::vector<std::uint8_t> bytes((std::istreambuf_iterator<char>(file)), {});
+    geocaching::RequestId request;
+    request.bytes.fill(1);
+    geocaching::protocol::DirectoryCapabilities result;
+    using geocaching::protocol::decodeDirectoryCapabilities;
+    assert(decodeDirectoryCapabilities({bytes.data(), bytes.size()}, request, result));
+    assert(result.max_query_items == 64 && result.cursor_ttl_seconds == 604800);
+    assert(result.name == "Public test directory");
+    for (std::size_t n = 0; n < bytes.size(); ++n)
+    {
+        assert(!decodeDirectoryCapabilities({bytes.data(), n}, request, result));
+        assert(result.name.empty() && result.max_query_items == 0);
+    }
+    request.bytes[0] = 2;
+    assert(!decodeDirectoryCapabilities({bytes.data(), bytes.size()}, request, result));
+    request.bytes.fill(1);
+    // Public role is the byte preceding the uint32 sync TTL.
+    bytes[bytes.size() - 6] = 0;
+    assert(!decodeDirectoryCapabilities({bytes.data(), bytes.size()}, request, result));
+}