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xo-objectd2: + DString.hash() + utest

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This commit is contained in:
Roland Conybeare 2026-01-15 17:39:17 -05:00
commit a16ab7e7c2
2 changed files with 44 additions and 0 deletions
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29
utest/DString.test.cpp
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@ -358,6 +358,35 @@ namespace xo {
REQUIRE(*apple1 >= *apple2);
REQUIRE_FALSE(*apple1 >= *banana);
}
TEST_CASE("DString-hash", "[object2][DString]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 4*1024 };
DArena arena = DArena::map(cfg);
auto alloc = with_facet<AAllocator>::mkobj(&arena);
DString * s1 = DString::from_cstr(alloc, "hello");
DString * s2 = DString::from_cstr(alloc, "hello");
DString * s3 = DString::from_cstr(alloc, "world");
DString * empty1 = DString::empty(alloc, 16);
DString * empty2 = DString::empty(alloc, 32);
// same content produces same hash
REQUIRE(s1->hash() == s2->hash());
// empty strings have same hash
REQUIRE(empty1->hash() == empty2->hash());
// different content produces different hash (not guaranteed, but highly likely)
REQUIRE(s1->hash() != s3->hash());
// std::hash specialization works
std::hash<DString> hasher;
REQUIRE(hasher(*s1) == s1->hash());
REQUIRE(hasher(*s2) == s2->hash());
REQUIRE(hasher(*s1) == hasher(*s2));
}
} /*namespace ut*/
} /*namespace xo*/