Add structures test

tests/structures.test.ts

@@ -0,0 +1,47 @@
+import { range } from "../core/iterable.ts";
+import { BinaryHeap, Queue, Stack } from "../tools/structures.ts"
+
+import { assertEquals } from "https://deno.land/[email protected]/testing/asserts.ts"
+
+Deno.test("Data structures - Stack", () => {
+    const stack = new Stack([1, 2, 3])
+    stack.push(4)
+    stack.push(5)
+
+    for (const i of range(5, 0)) {
+        assertEquals(stack.pop(), i)
+    }
+    assertEquals(stack.length, 0)
+})
+
+Deno.test("Data structures - Queue", () => {
+    const queue = new Queue([0, 1, 2, 3])
+    queue.push(4)
+    queue.push(5)
+
+    for (const i of range(6)) {
+        assertEquals(queue.pop(), i)
+    }
+    assertEquals(queue.length, 0)
+})
+
+Deno.test("Data structures - Binary Heap: Bubble up", () => {
+    const heap = new BinaryHeap<number>((a, b) => a - b)
+
+    heap.push(5)
+    heap.push(3)
+
+    assertEquals(heap.peek(), 3)
+})
+
+Deno.test("Data structures - Binary Heap", () => {
+    const heap = new BinaryHeap(
+        (a, b) => a - b,
+        [5, 3, 8, 1, 2, 6, 9, 4, 7]
+    )
+    let i = 1
+    for (const el of heap) {
+        assertEquals(el, i++)
+    }
+    assertEquals(i, 10)
+})