#include <gtest/gtest.h>
#include "vde/core/convex_hull.h"

using namespace vde::core;

TEST(ConvexHullTest, ThreePoints_ReturnsTriangle) {
    std::vector<Point2D> pts = {{0,0}, {1,0}, {0,1}};
    auto hull = convex_hull_2d(pts);
    EXPECT_EQ(hull.size(), 3u);
}

TEST(ConvexHullTest, CollinearPoints_ReturnsEndpoints) {
    std::vector<Point2D> pts = {{0,0}, {1,1}, {2,2}, {3,3}};
    auto hull = convex_hull_2d(pts);
    EXPECT_GE(hull.size(), 2u);
}

TEST(ConvexHullTest, Empty_ReturnsEmpty) {
    auto hull = convex_hull_2d({});
    EXPECT_TRUE(hull.empty());
}