전체적인 리팩토링

tests/autotrade/order-guard-cost.test.ts

@@ -0,0 +1,68 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { clampExecutableOrderQuantity } from "../../lib/autotrade/executable-order-quantity";
+import {
+  estimateBuyUnitCost,
+  estimateOrderCost,
+  resolveExecutionCostProfile,
+} from "../../lib/autotrade/execution-cost";
+
+test("SELL 차단: 보유 없음/매도가능 없음", () => {
+  const result = clampExecutableOrderQuantity({
+    side: "sell",
+    requestedQuantity: 1,
+    holdingQuantity: 0,
+    sellableQuantity: 0,
+  });
+
+  assert.equal(result.ok, false);
+  assert.equal(result.quantity, 0);
+});
+
+test("SELL 제한: 보유보다 큰 수량 또는 매도가능 부족 시 clamp", () => {
+  const result = clampExecutableOrderQuantity({
+    side: "sell",
+    requestedQuantity: 5,
+    holdingQuantity: 10,
+    sellableQuantity: 3,
+  });
+
+  assert.equal(result.ok, true);
+  assert.equal(result.quantity, 3);
+  assert.equal(result.adjusted, true);
+});
+
+test("BUY 제한: 최대 매수 가능 수량으로 clamp", () => {
+  const result = clampExecutableOrderQuantity({
+    side: "buy",
+    requestedQuantity: 4,
+    maxBuyQuantity: 2,
+  });
+
+  assert.equal(result.ok, true);
+  assert.equal(result.quantity, 2);
+  assert.equal(result.adjusted, true);
+});
+
+test("수수료/세금 추정: buy/sell 순액 계산", () => {
+  const profile = resolveExecutionCostProfile();
+  const buyUnitCost = estimateBuyUnitCost(10_000, profile);
+  const buy = estimateOrderCost({
+    side: "buy",
+    price: 10_000,
+    quantity: 10,
+    profile,
+  });
+  const sell = estimateOrderCost({
+    side: "sell",
+    price: 10_000,
+    quantity: 10,
+    profile,
+  });
+
+  assert.ok(buyUnitCost > 10_000);
+  assert.ok(buy.netAmount > buy.grossAmount);
+  assert.ok(sell.netAmount < sell.grossAmount);
+  assert.ok(sell.taxAmount >= 0);
+});
+