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xo-arena: add DArenaVector<double> utests for resize+clear

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Roland Conybeare 2026-01-06 16:41:12 -05:00
commit ef55002556
1 changed files with 111 additions and 0 deletions
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111
xo-arena/utest/DArenaVector.test.cpp
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@ -110,6 +110,117 @@ namespace xo {
// index > size is invalid
REQUIRE_THROWS_AS(vec.at(100), std::out_of_range);
}
TEST_CASE("DArenaVector-resize-expand", "[arena][DArenaVector]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 4096 };
DArenaVector<double> vec = DArenaVector<double>::map(cfg);
REQUIRE(vec.size() == 0);
// resize from 0 to 5
vec.resize(5);
REQUIRE(vec.size() == 5);
// can write to all indices
for (size_t i = 0; i < 5; ++i) {
vec[i] = static_cast<double>(i * 10);
}
REQUIRE(vec[0] == 0.0);
REQUIRE(vec[1] == 10.0);
REQUIRE(vec[2] == 20.0);
REQUIRE(vec[3] == 30.0);
REQUIRE(vec[4] == 40.0);
// resize to larger
vec.resize(8);
REQUIRE(vec.size() == 8);
// original values preserved
REQUIRE(vec[0] == 0.0);
REQUIRE(vec[1] == 10.0);
REQUIRE(vec[4] == 40.0);
}
TEST_CASE("DArenaVector-resize-shrink", "[arena][DArenaVector]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 4096 };
DArenaVector<double> vec = DArenaVector<double>::map(cfg);
vec.push_back(1.0);
vec.push_back(2.0);
vec.push_back(3.0);
vec.push_back(4.0);
vec.push_back(5.0);
REQUIRE(vec.size() == 5);
// shrink to 3
vec.resize(3);
REQUIRE(vec.size() == 3);
// first 3 elements preserved
REQUIRE(vec[0] == 1.0);
REQUIRE(vec[1] == 2.0);
REQUIRE(vec[2] == 3.0);
// index 3 now out of bounds
REQUIRE_THROWS_AS(vec.at(3), std::out_of_range);
// shrink to 0
vec.resize(0);
REQUIRE(vec.size() == 0);
REQUIRE(vec.empty());
}
TEST_CASE("DArenaVector-resize-same", "[arena][DArenaVector]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 4096 };
DArenaVector<double> vec = DArenaVector<double>::map(cfg);
vec.push_back(10.0);
vec.push_back(20.0);
vec.push_back(30.0);
REQUIRE(vec.size() == 3);
// resize to same size
vec.resize(3);
REQUIRE(vec.size() == 3);
// values unchanged
REQUIRE(vec[0] == 10.0);
REQUIRE(vec[1] == 20.0);
REQUIRE(vec[2] == 30.0);
}
TEST_CASE("DArenaVector-clear", "[arena][DArenaVector]")
{
ArenaConfig cfg { .name_ = "testarena",
.size_ = 4096 };
DArenaVector<double> vec = DArenaVector<double>::map(cfg);
vec.push_back(1.0);
vec.push_back(2.0);
vec.push_back(3.0);
REQUIRE(vec.size() == 3);
REQUIRE(!vec.empty());
vec.clear();
REQUIRE(vec.size() == 0);
REQUIRE(vec.empty());
// can still push after clear
vec.push_back(99.0);
REQUIRE(vec.size() == 1);
REQUIRE(vec[0] == 99.0);
}
}
}