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test(wcp): add truncation detection test

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Locks in the recent unpack truncation guard. Hand-writes a WCP
that declares dataSize=1000 but only ships 50 bytes; verifies
the unpack returns false AND that no partial file landed on disk.
This commit is contained in:
Kelsi 2026-05-06 08:13:43 -07:00
parent aa2a70de8d
commit 9d37da45d8
1 changed files with 28 additions and 0 deletions
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28
tests/test_editor_units.cpp
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@ -220,6 +220,34 @@ TEST_CASE("WCP unpack rejects bad magic", "[wcp]") {
fs::remove_all("test_wcp_out");
}
TEST_CASE("WCP unpack rejects truncated file body", "[wcp]") {
namespace fs = std::filesystem;
fs::create_directories("test_wcp_out");
std::string info = R"({"name":"truncated"})";
{
// Hand-write a WCP that declares dataSize=1000 but only writes 50.
std::ofstream f("test_wcp_out/short.wcp", std::ios::binary);
f.write(reinterpret_cast<const char*>(&kWCP_MAGIC), 4);
uint32_t fileCount = 1, infoSize = static_cast<uint32_t>(info.size());
f.write(reinterpret_cast<const char*>(&fileCount), 4);
f.write(reinterpret_cast<const char*>(&infoSize), 4);
f.write(info.data(), infoSize);
std::string path = "data.bin";
uint16_t pathLen = static_cast<uint16_t>(path.size());
f.write(reinterpret_cast<const char*>(&pathLen), 2);
f.write(path.data(), pathLen);
uint32_t declared = 1000;
f.write(reinterpret_cast<const char*>(&declared), 4);
std::string actual(50, 'X');
f.write(actual.data(), actual.size());
}
REQUIRE_FALSE(ContentPacker::unpackZone("test_wcp_out/short.wcp",
"test_wcp_out/dest"));
// Confirm we did NOT silently write the partial data.
REQUIRE_FALSE(fs::exists("test_wcp_out/dest/truncated/data.bin"));
fs::remove_all("test_wcp_out");
}
// ============== EditorBrush::getInfluence tests ==============
#include "editor_brush.hpp"