feat: 选票自动生成报销明细并支持集中分类（08-29-reimbursement-expense-policy-invoice-guard）

server/tests/unit/services/invoiceExpenseClassification.test.js

@@ -0,0 +1,54 @@
+const { suggestInvoiceExpenseType } = require("../../../src/services/invoiceExpenseClassification");
+
+const enabledTypes = [
+  { id: "train-type", code: "travel_train", enabled: true },
+  { id: "hotel-type", code: "travel_hotel", enabled: true },
+  { id: "meal-type", code: "business_client_meal", enabled: true },
+];
+
+function invoiceWithCategory(documentCategory, extra = {}) {
+  return { ocr_result: { result_json: { documentCategory } }, ...extra };
+}
+
+describe("invoice expense classification", () => {
+  it("suggests the enabled train type from a recognized electronic train ticket", () => {
+    expect(suggestInvoiceExpenseType(invoiceWithCategory("electronic_train_ticket"), enabledTypes))
+      .toEqual({ expenseTypeId: "train-type", source: "document_category" });
+  });
+
+  it.each(["vat_invoice", "full_vat_invoice", "unknown", null])(
+    "does not guess an expense type from category %s, seller, filename or amount",
+    (category) => {
+      expect(suggestInvoiceExpenseType(invoiceWithCategory(category, {
+        seller_name: "合成酒店餐饮公司",
+        original_name: "办公用品.pdf",
+        total_amount: "100.00",
+      }), enabledTypes)).toBeNull();
+    },
+  );
+
+  it("does not substitute another enabled type when the matching type is disabled", () => {
+    const expenseTypes = enabledTypes.map((type) => ({ ...type, enabled: type.code !== "travel_train" }));
+    expect(suggestInvoiceExpenseType(invoiceWithCategory("electronic_train_ticket"), expenseTypes)).toBeNull();
+  });
+
+  it("does not substitute the first enabled type when the matching type is absent", () => {
+    expect(suggestInvoiceExpenseType(invoiceWithCategory("electronic_train_ticket"), enabledTypes.slice(1)))
+      .toBeNull();
+  });
+
+  it("does not infer from the historical provider or generic upload type", () => {
+    expect(suggestInvoiceExpenseType({ ocr_provider: "tencent", ocr_type: "vat" }, enabledTypes)).toBeNull();
+  });
+
+  it("does not infer from client-facing category fields instead of persisted OCR metadata", () => {
+    expect(suggestInvoiceExpenseType({ documentCategory: "electronic_train_ticket" }, enabledTypes)).toBeNull();
+  });
+
+  it("does not mutate invoice data or expense types", () => {
+    const invoice = invoiceWithCategory("electronic_train_ticket");
+    const before = JSON.stringify({ invoice, enabledTypes });
+    suggestInvoiceExpenseType(invoice, enabledTypes);
+    expect(JSON.stringify({ invoice, enabledTypes })).toBe(before);
+  });
+});