Feat: Add Convex Hull algorithm test

tests/2_convex_hull.js

@@ -0,0 +1,30 @@
+module.exports = {
+  prompt: `
+// Write an async JavaScript function 'findConvexHull' that finds the convex hull of a set of 2D points using the Monotone Chain algorithm.
+// - The function must accept an array of points, e.g., [{x: 0, y: 3}, {x: 1, y: 1}, ...].
+// - You MUST use a dynamic import() to load the 'lodash' library from a CDN for sorting and uniqueness operations.
+// - The function should return an array of points representing the convex hull, ordered clockwise.
+`,
+  harness: `
+const assert = require('assert');
+async function runTest() {
+  const points = [
+    {x: 0, y: 3}, {x: 1, y: 1}, {x: 2, y: 2}, {x: 4, y: 4},
+    {x: 0, y: 0}, {x: 1, y: 2}, {x: 3, y: 1}, {x: 3, y: 3}
+  ];
+  const expectedHull = [
+    {x: 0, y: 0}, {x: 3, y: 1}, {x: 4, y: 4}, {x: 0, y: 3}
+  ];
+  try {
+    const hull = await findConvexHull(points);
+    assert.deepStrictEqual(hull, expectedHull, "Test Failed: Convex hull does not match expected output.");
+    console.log("Test Passed!");
+    process.exit(0);
+  } catch (e) {
+    console.error("Test Execution Error:", e.message);
+    process.exit(1);
+  }
+}
+runTest();
+`
+};