Add comprehensive tests for client validation, revenue and expense categories, invoice generation, and schemas

- Implement tests for client validation functions including tax ID, VAT ID, IBAN, BIC, website, and company form validation.
- Create tests for revenue and expense categories ensuring all expected categories and labels are present.
- Add tests for invoice number generation with various scenarios including prefix handling and sequence padding.
- Introduce tests for default categories and their integration, ensuring no overlaps and consistent naming conventions.
- Implement Zod schema validation tests for currency, tax rates, IBAN, tax ID, VAT ID, invoices, companies, and customers.
- Add utility tests for tax calculations, including item amounts and invoice totals, ensuring correct handling of tax rates and formatting.
- Set up Vitest configuration and global test setup for consistent testing environment.
This commit is contained in:
hwinkel
2026-05-08 16:03:05 +02:00
parent 586d5b2cc8
commit db953b1e28
18 changed files with 3370 additions and 19 deletions
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# Tests - Annas RechnungsManager
Vitest-basiertes Test-Framework für kritische Geschäftslogik.
## Setup
```bash
# Install dependencies (already done)
npm install
# Run tests
npm run test # Single run
npm run test:watch # Watch mode
npm run test:ui # Browser UI
npm run test:coverage # With coverage report
```
## Test Structure
```
tests/
├── lib/
│ ├── tax.test.ts # Steuerberechnungen (§14 UStG)
│ └── schemas.test.ts # Zod-Validierung (Input-Sicherheit)
└── README.md
```
## Coverage
-**tax.ts** - German tax calculations (19%, 7%, Kleinunternehmer)
-**schemas.ts** - Input validation (Zod schemas)
- ⚠️ **invoice-number.server.ts** - Requires Prisma mocking (TODO)
## Critical Test Areas
1. **Tax Calculations** - Must be correct per German tax law
2. **Input Validation** - Prevent invalid data in DB
3. **Invoice Logic** - §14 UStG compliance
4. **Buchhaltung** - Double-entry bookkeeping accuracy
## Running Specific Tests
```bash
# Run only tax tests
npx vitest run tests/lib/tax.test.ts
# Run with coverage
npm run test:coverage
# Opens: ./coverage/index.html
```
## Writing New Tests
```typescript
import { describe, it, expect } from "vitest";
import { myFunction } from "@/lib/my-module";
describe("myModule", () => {
it("should do something", () => {
expect(myFunction()).toBe(expected);
});
});
```
## CI Integration
Tests laufen automatisch in der Gitea Actions Pipeline (`.gitea/workflows/build.yml`).
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import { describe, it, expect } from "vitest";
import { render, screen } from "@testing-library/react";
import { InvoiceStatusBadge } from "@/components/invoice/invoice-status-badge";
import { InvoiceStatus } from "@prisma/client";
describe("InvoiceStatusBadge", () => {
it("should render DRAFT status correctly", () => {
render(<InvoiceStatusBadge status={InvoiceStatus.DRAFT} />);
expect(screen.getByText("Entwurf")).toBeInTheDocument();
});
it("should render SENT status correctly", () => {
render(<InvoiceStatusBadge status={InvoiceStatus.SENT} />);
expect(screen.getByText("Versendet")).toBeInTheDocument();
});
it("should render PAID status correctly", () => {
render(<InvoiceStatusBadge status={InvoiceStatus.PAID} />);
expect(screen.getByText("Bezahlt")).toBeInTheDocument();
});
it("should render CANCELLED status correctly", () => {
render(<InvoiceStatusBadge status={InvoiceStatus.CANCELLED} />);
expect(screen.getByText("Storniert")).toBeInTheDocument();
});
it("should render DELETED status correctly", () => {
render(<InvoiceStatusBadge status={InvoiceStatus.DELETED} />);
expect(screen.getByText("Gelöscht")).toBeInTheDocument();
});
it("should have proper badge structure", () => {
render(<InvoiceStatusBadge status={InvoiceStatus.PAID} />);
const badge = screen.getByText("Bezahlt");
expect(badge).toBeInTheDocument();
// Badge should be a div element
expect(badge.tagName).toBe("DIV");
});
});
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import { describe, it, expect } from "vitest";
/**
* Simple Integration Tests
*
* These tests verify that the API logic works correctly
* without requiring a full database connection.
*/
describe("API Integration (Simple)", () => {
describe("Company API Logic", () => {
it("should validate company creation data", async () => {
const { companySchema } = await import("@/lib/schemas");
const validCompany = {
name: "Test GmbH",
address: "Hauptstraße 1",
zip: "12345",
city: "Berlin",
country: "DE",
invoicePrefix: "RE",
kleinunternehmer: false,
taxId: null,
vatId: null,
bankIban: null,
bankBic: "",
};
const result = companySchema.safeParse(validCompany);
expect(result.success).toBe(true);
});
it("should reject invalid company data", async () => {
const { companySchema } = await import("@/lib/schemas");
const invalidCompany = {
name: "", // Invalid: empty name
address: "Test St. 1",
zip: "12345",
city: "Berlin",
};
const result = companySchema.safeParse(invalidCompany);
expect(result.success).toBe(false);
});
});
describe("Invoice API Logic", () => {
it("should validate invoice creation data", async () => {
const { invoiceSchema } = await import("@/lib/schemas");
const validInvoice = {
companyId: "company-123",
customerId: "customer-456",
issueDate: "2026-05-08",
dueDate: "2026-06-08",
kleinunternehmer: false,
items: [
{
position: 1,
description: "Web Development",
quantity: 10,
unit: "Stunden",
unitPrice: 100,
taxRate: 19,
netAmount: 1000,
taxAmount: 190,
grossAmount: 1190,
},
],
netTotal: 1000,
taxTotal: 190,
grossTotal: 1190,
};
const result = invoiceSchema.safeParse(validInvoice);
expect(result.success).toBe(true);
});
it("should reject invoice with no items", async () => {
const { invoiceSchema } = await import("@/lib/schemas");
const invalidInvoice = {
companyId: "company-123",
customerId: "customer-456",
issueDate: "2026-05-08",
dueDate: "2026-06-08",
items: [], // Invalid: no items
netTotal: 0,
taxTotal: 0,
grossTotal: 0,
};
const result = invoiceSchema.safeParse(invalidInvoice);
expect(result.success).toBe(false);
});
});
describe("Customer API Logic", () => {
it("should validate customer data", async () => {
const { customerSchema } = await import("@/lib/schemas");
const validCustomer = {
companyId: "company-123",
name: "Max Mustermann",
address: "Musterstraße 1",
zip: "12345",
city: "Berlin",
country: "DE",
};
const result = customerSchema.safeParse(validCustomer);
expect(result.success).toBe(true);
});
it("should require companyId", async () => {
const { customerSchema } = await import("@/lib/schemas");
const invalidCustomer = {
name: "Max Mustermann",
address: "Musterstraße 1",
zip: "12345",
city: "Berlin",
};
const result = customerSchema.safeParse(invalidCustomer);
expect(result.success).toBe(false);
});
});
describe("Tax Calculation Integration", () => {
it("should calculate invoice totals from items", async () => {
const { calcItemAmounts, calcInvoiceTotals } = await import("@/lib/tax");
const items = [
{
quantity: 10,
unitPrice: 100,
taxRate: 19,
},
{
quantity: 5,
unitPrice: 200,
taxRate: 7,
},
].map((item, idx) => ({
position: idx + 1,
description: `Service ${idx + 1}`,
...item,
...calcItemAmounts(item.quantity, item.unitPrice, item.taxRate),
}));
const totals = calcInvoiceTotals(items);
expect(totals.netTotal).toBe(2000); // 1000 + 1000
expect(totals.taxTotal).toBe(260); // 190 + 70 (5*200*7% = 70)
expect(totals.grossTotal).toBe(2260); // 1190 + 1070
});
it("should handle Kleinunternehmer calculation", async () => {
const { calcItemAmountsKleinunternehmer, calcInvoiceTotals } = await import("@/lib/tax");
const items = [
{
quantity: 10,
unitPrice: 100,
},
].map((item, idx) => ({
position: idx + 1,
description: "Service",
...item,
...calcItemAmountsKleinunternehmer(item.quantity, item.unitPrice),
taxRate: 0,
}));
const totals = calcInvoiceTotals(items);
expect(totals.netTotal).toBe(1000);
expect(totals.taxTotal).toBe(0);
expect(totals.grossTotal).toBe(1000);
});
});
describe("Authentication Logic", () => {
it("should identify unauthorized requests", () => {
const user = null;
const isAuthenticated = user !== null;
expect(isAuthenticated).toBe(false);
});
it("should identify authorized requests", () => {
const user = { id: "user-123", role: "ADMIN" };
const isAuthenticated = user !== null;
expect(isAuthenticated).toBe(true);
expect(user.role).toBe("ADMIN");
});
});
});
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import { describe, it, expect, beforeAll, afterAll, beforeEach } from "vitest";
import { testPrisma, setupTestDatabase, cleanupTestDatabase, createTestUser, createTestCompany, createTestCustomer } from "./setup";
import bcrypt from "bcryptjs";
/**
* Integration Tests for API Routes
*
* These tests require a test database.
* They will skip gracefully if the database is not available.
*/
describe("API Integration Tests (Database Required)", () => {
let testUser: any;
let testCompany: any;
let testCustomer: any;
let dbAvailable = false;
// Setup before all tests
beforeAll(async () => {
dbAvailable = await setupTestDatabase();
if (!dbAvailable) {
console.warn("Skipping database integration tests - no test database available");
return;
}
// Create test user
testUser = await createTestUser("test@example.com", "testuser");
// Create test company
testCompany = await createTestCompany(testUser.id, "Integration Test GmbH");
// Create test customer
testCustomer = await createTestCustomer(testCompany.id, "Integration Test Customer");
});
// Cleanup after all tests
afterAll(async () => {
if (!dbAvailable) return;
await cleanupTestDatabase();
await testPrisma.$disconnect();
});
// Clean data between tests (but keep user/company/customer)
beforeEach(async () => {
if (!dbAvailable) return;
// Delete invoices and related items
await testPrisma.invoiceItem.deleteMany({
where: { invoice: { companyId: testCompany.id } },
});
await testPrisma.invoice.deleteMany({
where: { companyId: testCompany.id },
});
});
// Helper to skip tests if no database
const dbTest = (name: string, fn: () => Promise<void>) => {
it(name, async () => {
if (!dbAvailable) {
console.warn(`Skipping "${name}" - no test database`);
return;
}
await fn();
});
};
describe("Companies API", () => {
dbTest("should list companies for a user", async () => {
const companies = await testPrisma.company.findMany({
where: { userId: testUser.id },
});
expect(companies).toBeDefined();
expect(companies.length).toBeGreaterThan(0);
expect(companies[0].name).toBe("Integration Test GmbH");
});
dbTest("should create a new company", async () => {
const newCompanyData = {
name: "New Test Company",
address: "New Street 1",
zip: "99999",
city: "Munich",
country: "DE",
};
const company = await testPrisma.company.create({
data: {
...newCompanyData,
userId: testUser.id,
},
});
expect(company).toBeDefined();
expect(company.name).toBe("New Test Company");
expect(company.userId).toBe(testUser.id);
});
});
describe("Invoices API", () => {
dbTest("should create a new invoice", async () => {
const { calcItemAmounts, calcInvoiceTotals } = await import("@/lib/tax");
const invoiceData = {
companyId: testCompany.id,
customerId: testCustomer.id,
issueDate: new Date(),
dueDate: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000),
kleinunternehmer: false,
items: [
{
position: 1,
description: "Test Service",
quantity: 10,
unit: "Stunden",
unitPrice: 100,
taxRate: 19,
netAmount: 1000,
taxAmount: 190,
grossAmount: 1190,
},
],
};
// Recalculate server-side (as the API does)
const recalculatedItems = invoiceData.items.map(item => ({
...item,
...calcItemAmounts(item.quantity, item.unitPrice, item.taxRate),
}));
const totals = calcInvoiceTotals(recalculatedItems);
const invoice = await testPrisma.invoice.create({
data: {
companyId: invoiceData.companyId,
customerId: invoiceData.customerId,
issueDate: invoiceData.issueDate,
dueDate: invoiceData.dueDate,
status: "DRAFT",
kleinunternehmer: invoiceData.kleinunternehmer,
netTotal: totals.netTotal,
taxTotal: totals.taxTotal,
grossTotal: totals.grossTotal,
items: {
create: recalculatedItems.map((item, idx) => ({
position: idx + 1,
description: item.description,
quantity: item.quantity,
unit: item.unit,
unitPrice: item.unitPrice,
taxRate: item.taxRate,
netAmount: item.netAmount,
taxAmount: item.taxAmount,
grossAmount: item.grossAmount,
})),
},
},
include: { items: true, customer: true },
});
expect(invoice).toBeDefined();
expect(invoice.status).toBe("DRAFT");
expect(invoice.items).toHaveLength(1);
expect(invoice.grossTotal).toBe(1190);
});
});
describe("Buchungen API", () => {
dbTest("should create a new Buchung", async () => {
const buchungData = {
companyId: testCompany.id,
date: new Date(),
account: "KASSE" as const,
type: "EINLAGE" as const,
amount: 1000,
description: "Initial investment",
isBusinessRecord: false,
};
const buchung = await testPrisma.buchung.create({
data: buchungData,
});
expect(buchung).toBeDefined();
expect(buchung.account).toBe("KASSE");
expect(buchung.type).toBe("EINLAGE");
expect(buchung.amount.toNumber()).toBe(1000);
});
});
});
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import { PrismaClient } from "@prisma/client";
import { execSync } from "child_process";
/**
* Integration Test Setup
* Uses a separate test database to avoid polluting development data
*/
const TEST_DATABASE_URL = process.env.TEST_DATABASE_URL ||
"mysql://annas_user:annas_password@localhost:3306/annas_rechnungen_test";
export const testPrisma = new PrismaClient({
datasources: {
db: {
url: TEST_DATABASE_URL,
},
},
});
/**
* Setup test database: push schema and seed if needed
* Returns true if successful, false if database unavailable
*/
export async function setupTestDatabase(): Promise<boolean> {
console.log("Setting up test database...");
try {
// Push schema to test database
execSync(`npx prisma db push --force-reset`, {
env: {
...process.env,
DATABASE_URL: TEST_DATABASE_URL,
},
stdio: "inherit",
});
console.log("Test database ready");
return true;
} catch (error) {
console.warn("Test database not available:", error);
return false;
}
}
/**
* Clean up test database
*/
export async function cleanupTestDatabase() {
// Delete all data in correct order (respecting foreign keys)
const tables = [
"audit_logs",
"invoice_items",
"invoices",
"buchung_kategorien",
"buchungen",
"anlagegueter",
"services",
"customers",
"companies",
"users",
];
for (const table of tables) {
await testPrisma.$executeRawUnsafe(`DELETE FROM ${table}`);
}
}
/**
* Create a test user
*/
export async function createTestUser(email: string, username: string) {
const bcrypt = await import("bcryptjs");
const passwordHash = await bcrypt.default.hash("test1234", 10);
return testPrisma.user.create({
data: {
email,
username,
name: "Test User",
passwordHash,
role: "ADMIN",
},
});
}
/**
* Create a test company for a user
*/
export async function createTestCompany(userId: string, name: string = "Test GmbH") {
return testPrisma.company.create({
data: {
name,
address: "Teststraße 1",
zip: "12345",
city: "Berlin",
country: "DE",
userId,
},
});
}
/**
* Create a test customer for a company
*/
export async function createTestCustomer(companyId: string, name: string = "Test Customer") {
return testPrisma.customer.create({
data: {
name,
address: "Kundenstraße 1",
zip: "54321",
city: "Hamburg",
country: "DE",
companyId,
},
});
}
/**
* Generate auth cookie for test requests
* (Simplified - in real scenario, you'd create a session)
*/
export function getAuthHeaders(userId: string) {
// For integration tests, we might mock the session or use a test session
return {
"Content-Type": "application/json",
"X-Test-User-Id": userId, // Custom header for test auth bypass
};
}
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import { describe, it, expect } from "vitest";
import {
jahresAfa,
erwerbsjahrAfa,
afaFuerJahr,
kumulierteAfa,
buchwert,
assetStatus,
AnlagegutRaw,
} from "@/lib/afa";
describe("afa.ts - Asset Depreciation (§7 EStG)", () => {
const sampleAsset: AnlagegutRaw = {
anschaffungskosten: 12000,
nutzungsdauerJahre: 3,
restwert: 0,
anschaffungsdatum: "2024-03-15", // March 15, 2024
aktiv: true,
};
describe("jahresAfa", () => {
it("should calculate full annual depreciation", () => {
// 12000 over 3 years = 4000 per year
expect(jahresAfa(12000, 0, 3)).toBe(4000);
});
it("should handle residual value (restwert)", () => {
// 12000 - 2000 restwert = 10000 over 3 years
expect(jahresAfa(12000, 2000, 3)).toBe(3333.33);
});
it("should handle different depreciation periods", () => {
// 24000 over 8 years = 3000 per year
expect(jahresAfa(24000, 0, 8)).toBe(3000);
});
});
describe("erwerbsjahrAfa", () => {
it("should calculate pro-rata depreciation in acquisition year", () => {
// Acquired March 15 = 10 months remaining (Mar-Dec, inclusive) = 10/12
// 4000 * (10/12) = 3333.33
const acqDate = new Date("2024-03-15");
const result = erwerbsjahrAfa(12000, 0, 3, acqDate);
expect(result).toBe(3333.33);
});
it("should calculate full year if acquired in January", () => {
const acqDate = new Date("2024-01-01");
const result = erwerbsjahrAfa(12000, 0, 3, acqDate);
expect(result).toBe(4000);
});
it("should calculate 1/12 if acquired in December", () => {
const acqDate = new Date("2024-12-01");
const result = erwerbsjahrAfa(12000, 0, 3, acqDate);
expect(result).toBe(333.33);
});
});
describe("afaFuerJahr", () => {
it("should return 0 for years before acquisition", () => {
expect(afaFuerJahr(sampleAsset, 2023)).toBe(0);
});
it("should return pro-rata for acquisition year", () => {
// 2024 acquisition, 10 months = 3333.33
const result = afaFuerJahr(sampleAsset, 2024);
expect(result).toBe(3333.33);
});
it("should return full annual amount for middle years", () => {
expect(afaFuerJahr(sampleAsset, 2025)).toBe(4000);
expect(afaFuerJahr(sampleAsset, 2026)).toBe(4000);
});
it("should return 0 after full depreciation period", () => {
// 3 years: 2024, 2025, 2026 -> after 2026 = 0
expect(afaFuerJahr(sampleAsset, 2027)).toBe(0);
});
it("should handle asset with residual value", () => {
const assetWithRestwert: AnlagegutRaw = {
anschaffungskosten: 5000,
nutzungsdauerJahre: 5,
restwert: 500,
anschaffungsdatum: "2024-01-01",
aktiv: true,
};
// (5000-500) / 5 = 900 per year
expect(afaFuerJahr(assetWithRestwert, 2024)).toBe(900);
expect(afaFuerJahr(assetWithRestwert, 2028)).toBe(900);
expect(afaFuerJahr(assetWithRestwert, 2029)).toBe(0);
});
});
describe("kumulierteAfa", () => {
it("should calculate cumulative depreciation correctly", () => {
// 2024: 3333.33, 2025: 4000, 2026: 4000 = 11333.33
expect(kumulierteAfa(sampleAsset, 2026)).toBe(11333.33);
});
it("should return 0 for year before acquisition", () => {
expect(kumulierteAfa(sampleAsset, 2023)).toBe(0);
});
it("should return full depreciation after end of period", () => {
// After 3 years: 3333.33 + 4000 + 4000 = 11333.33
// But asset cost is 12000, so 12000 - 11333.33 = 666.67 remaining
const result = kumulierteAfa(sampleAsset, 2027);
expect(result).toBe(11333.33);
});
});
describe("buchwert", () => {
it("should calculate book value correctly", () => {
// 2024: 3333.33 depreciation -> 12000 - 3333.33 = 8666.67
expect(buchwert(sampleAsset, 2024)).toBe(8666.67);
// 2025: another 4000 -> 8666.67 - 4000 = 4666.67
expect(buchwert(sampleAsset, 2025)).toBe(4666.67);
// 2026: another 4000 -> 4666.67 - 4000 = 666.67
expect(buchwert(sampleAsset, 2026)).toBe(666.67);
});
it("should not go below residual value", () => {
const assetWithRestwert: AnlagegutRaw = {
anschaffungskosten: 5000,
nutzungsdauerJahre: 5,
restwert: 500,
anschaffungsdatum: "2024-01-01",
aktiv: true,
};
// After full depreciation: 5000 - (900 * 5) = 500
expect(buchwert(assetWithRestwert, 2028)).toBe(500);
expect(buchwert(assetWithRestwert, 2030)).toBe(500);
});
it("should return acquisition cost for year before acquisition", () => {
expect(buchwert(sampleAsset, 2023)).toBe(12000);
});
});
describe("assetStatus", () => {
it("should return 'inaktiv' for inactive assets", () => {
const inactive: AnlagegutRaw = { ...sampleAsset, aktiv: false };
expect(assetStatus(inactive, 2025)).toBe("inaktiv");
});
it("should return 'aktiv' for active assets within depreciation period", () => {
expect(assetStatus(sampleAsset, 2024)).toBe("aktiv");
expect(assetStatus(sampleAsset, 2025)).toBe("aktiv");
expect(assetStatus(sampleAsset, 2026)).toBe("aktiv");
});
it("should return 'vollständig abgeschrieben' after depreciation period", () => {
expect(assetStatus(sampleAsset, 2027)).toBe("vollständig abgeschrieben");
expect(assetStatus(sampleAsset, 2030)).toBe("vollständig abgeschrieben");
});
});
});
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import { describe, it, expect } from "vitest";
import { Decimal } from "@prisma/client";
describe("Buchungen - Double-Entry Bookkeeping Logic", () => {
describe("TransactionAccount Enum", () => {
it("should have KASSE and BANK accounts", () => {
// These are the two main accounts for German bookkeeping
const accounts = ["KASSE", "BANK"];
expect(accounts).toContain("KASSE");
expect(accounts).toContain("BANK");
});
});
describe("TransactionType Enum", () => {
it("should have EINLAGE and ENTNAHME types", () => {
// EINLAGE = Owner investment, ENTNAHME = Owner withdrawal
const types = ["EINLAGE", "ENTNAHME"];
expect(types).toContain("EINLAGE");
expect(types).toContain("ENTNAHME");
});
});
describe("Zahlungsart Enum", () => {
it("should have KASSE and BANK payment methods", () => {
const paymentMethods = ["KASSE", "BANK"];
expect(paymentMethods).toContain("KASSE");
expect(paymentMethods).toContain("BANK");
});
});
describe("Buchung Business Logic", () => {
it("should calculate correct sign for EINLAGE (positive)", () => {
// EINLAGE increases the company's assets
const amount = 1000;
const type = "EINLAGE";
// In German bookkeeping: EINLAGE is recorded as positive (credit to equity)
const signedAmount = type === "EINLAGE" ? amount : -amount;
expect(signedAmount).toBe(1000);
});
it("should calculate correct sign for ENTNAHME (negative)", () => {
// ENTNAHME decreases the company's assets
const amount = 500;
const type = "ENTNAHME";
// In German bookkeeping: ENTNAHME is recorded as negative (debit to equity)
const signedAmount = type === "EINLAGE" ? amount : -amount;
expect(signedAmount).toBe(-500);
});
it("should identify business records correctly", () => {
// Business records (isBusinessRecord = true) come from Einnahmen/Ausgaben
const isBusinessRecord = true;
const hasKategorie = true;
expect(isBusinessRecord).toBe(true);
expect(hasKategorie).toBe(true);
});
it("should handle non-business records (private)", () => {
// Non-business records might not have a kategorie
const isBusinessRecord = false;
const kategorie = null;
expect(isBusinessRecord).toBe(false);
expect(kategorie).toBeNull();
});
it("should validate Decimal precision for amounts", () => {
// Prisma Decimal(10,2) - max 10 digits, 2 decimal places
const amount = 12345678.90; // 8 digits before decimal, 2 after
const maxAmount = 99999999.99; // Max for DECIMAL(10,2)
expect(amount).toBeLessThanOrEqual(maxAmount);
expect(Number(amount.toFixed(2))).toBe(12345678.9);
});
});
describe("Buchung Link Logic (Linked Transactions)", () => {
it("should allow linking related transactions", () => {
// Example: An invoice payment might be linked to the invoice
const buchungId = "buchung-123";
const linkedBuchungId = "buchung-456";
// A Buchung can be linked to another (e.g., invoice payment -> invoice)
const link = { source: buchungId, target: linkedBuchungId };
expect(link.source).toBe("buchung-123");
expect(link.target).toBe("buchung-456");
});
});
describe("Kategorie Logic", () => {
it("should have unique category names per company", () => {
// BuchungKategorie has @@unique([companyId, name, typ])
const companyId = "company-123";
const categories = [
{ companyId, name: "Fußpflege", typ: "EINNAHME" },
{ companyId, name: "Miete", typ: "AUSGABE" },
];
const uniqueCheck = new Set(categories.map(c => `${c.companyId}-${c.name}-${c.typ}`));
expect(uniqueCheck.size).toBe(categories.length);
});
it("should distinguish between EINNAHME and AUSGABE", () => {
const einnahme: "EINNAHME" = "EINNAHME";
const ausgabe: "AUSGABE" = "AUSGABE";
expect(einnahme).toBe("EINNAHME");
expect(ausgabe).toBe("AUSGABE");
expect(einnahme).not.toBe(ausgabe);
});
});
describe("Date-Based Queries", () => {
it("should filter Buchungen by date range", () => {
const buchungen = [
{ date: new Date("2026-01-15"), amount: 100 },
{ date: new Date("2026-02-20"), amount: 200 },
{ date: new Date("2026-03-10"), amount: 300 },
];
const startDate = new Date("2026-02-01");
const endDate = new Date("2026-03-31");
const filtered = buchungen.filter(b =>
b.date >= startDate && b.date <= endDate
);
expect(filtered).toHaveLength(2);
expect(filtered[0].amount).toBe(200);
expect(filtered[1].amount).toBe(300);
});
it("should group Buchungen by month for reports", () => {
const buchungen = [
{ date: new Date("2026-01-10"), amount: 100 },
{ date: new Date("2026-01-20"), amount: 150 },
{ date: new Date("2026-02-05"), amount: 200 },
];
const grouped = buchungen.reduce((acc, b) => {
const month = b.date.getMonth(); // 0-indexed
acc[month] = (acc[month] || 0) + b.amount;
return acc;
}, {} as Record<number, number>);
expect(grouped[0]).toBe(250); // January (month 0)
expect(grouped[1]).toBe(200); // February (month 1)
});
});
});
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import { describe, it, expect, beforeEach, afterEach } from "vitest";
import {
isDebugMode,
setDebugMode,
validateTaxId,
validateVatId,
validateIban,
validateBic,
validateWebsite,
validateCompanyForm,
getFieldError,
hasFieldError,
type ValidationError,
type CompanyFormData,
} from "@/lib/client-validation";
describe("client-validation.ts", () => {
// Mock localStorage
const localStorageMock = (() => {
let store: Record<string, string> = {};
return {
getItem: (key: string) => store[key] || null,
setItem: (key: string, value: string) => { store[key] = value; },
removeItem: (key: string) => { delete store[key]; },
clear: () => { store = {}; },
};
})();
beforeEach(() => {
// Reset localStorage mock
localStorageMock.clear();
(global as any).localStorage = localStorageMock;
(global as any).window = { localStorage: localStorageMock };
});
afterEach(() => {
(global as any).window = undefined;
});
describe("Debug Mode", () => {
it("should be disabled by default (no window)", () => {
(global as any).window = undefined;
expect(isDebugMode()).toBe(false);
});
it("should detect debug mode from localStorage", () => {
setDebugMode(true);
expect(isDebugMode()).toBe(true);
});
it("should disable debug mode", () => {
setDebugMode(true);
expect(isDebugMode()).toBe(true);
setDebugMode(false);
expect(isDebugMode()).toBe(false);
});
});
describe("validateTaxId", () => {
it("should return null for empty/null values", () => {
expect(validateTaxId("")).toBeNull();
expect(validateTaxId(null)).toBeNull();
expect(validateTaxId(undefined)).toBeNull();
});
it("should validate correct 10-digit tax ID", () => {
expect(validateTaxId("1234567890")).toBeNull();
});
it("should reject invalid tax IDs", () => {
const result = validateTaxId("123"); // Too short
expect(result).not.toBeNull();
expect(result?.field).toBe("taxId");
expect(result?.message).toContain("10 Ziffern");
});
it("should reject tax ID with letters", () => {
const result = validateTaxId("abc4567890");
expect(result).not.toBeNull();
});
});
describe("validateVatId", () => {
it("should return null for empty/null values", () => {
expect(validateVatId("")).toBeNull();
expect(validateVatId(null)).toBeNull();
});
it("should validate correct DE VAT ID", () => {
expect(validateVatId("DE123456789")).toBeNull();
});
it("should reject VAT ID without DE prefix", () => {
const result = validateVatId("1234567890");
expect(result).not.toBeNull();
expect(result?.field).toBe("vatId");
expect(result?.message).toContain("DE + 9 Ziffern");
});
it("should reject VAT ID with wrong length", () => {
const result = validateVatId("DE12345"); // Too short
expect(result).not.toBeNull();
});
});
describe("validateIban", () => {
it("should return null for empty/null values", () => {
expect(validateIban("")).toBeNull();
expect(validateIban(null)).toBeNull();
});
it("should validate correct IBAN", () => {
expect(validateIban("DE89370400440532013000")).toBeNull();
});
it("should reject invalid IBAN", () => {
const result = validateIban("INVALID");
expect(result).not.toBeNull();
expect(result?.field).toBe("bankIban");
expect(result?.message).toContain("IBAN");
});
});
describe("validateBic", () => {
it("should return null for empty/null values", () => {
expect(validateBic("")).toBeNull();
expect(validateBic(null)).toBeNull();
});
it("should validate correct BIC", () => {
expect(validateBic("DEUTDEFF")).toBeNull();
});
it("should reject invalid BIC", () => {
const result = validateBic("123"); // Too short
expect(result).not.toBeNull();
expect(result?.field).toBe("bankBic");
});
});
describe("validateWebsite", () => {
it("should return null for empty/null values", () => {
expect(validateWebsite("")).toBeNull();
expect(validateWebsite(null)).toBeNull();
});
it("should validate correct website URLs", () => {
expect(validateWebsite("https://example.com")).toBeNull();
expect(validateWebsite("http://example.com")).toBeNull();
});
it("should reject website without protocol", () => {
const result = validateWebsite("example.com");
expect(result).not.toBeNull();
expect(result?.field).toBe("website");
expect(result?.message).toContain("http:// oder https://");
});
it("should reject too long website URLs", () => {
const longUrl = "https://" + "a".repeat(250);
const result = validateWebsite(longUrl);
expect(result).not.toBeNull();
expect(result?.message).toContain("255");
});
});
describe("validateCompanyForm", () => {
const validFormData: CompanyFormData = {
name: "Test GmbH",
address: "Hauptstraße 1",
zip: "12345",
city: "Berlin",
};
it("should pass validation for valid data", () => {
const errors = validateCompanyForm(validFormData);
expect(errors).toHaveLength(0);
});
it("should require name", () => {
const data = { ...validFormData, name: "" };
const errors = validateCompanyForm(data);
expect(errors.length).toBeGreaterThan(0);
expect(errors[0].field).toBe("name");
});
it("should require address", () => {
const data = { ...validFormData, address: "" };
const errors = validateCompanyForm(data);
const addressError = errors.find(e => e.field === "address");
expect(addressError).toBeDefined();
});
it("should require zip", () => {
const data = { ...validFormData, zip: "" };
const errors = validateCompanyForm(data);
const zipError = errors.find(e => e.field === "zip");
expect(zipError).toBeDefined();
});
it("should require city", () => {
const data = { ...validFormData, city: "" };
const errors = validateCompanyForm(data);
const cityError = errors.find(e => e.field === "city");
expect(cityError).toBeDefined();
});
it("should validate zip format (digits only)", () => {
const data = { ...validFormData, zip: "abc" };
const errors = validateCompanyForm(data);
const zipError = errors.find(e => e.field === "zip");
expect(zipError).toBeDefined();
expect(zipError?.message).toContain("Zahlen");
});
it("should validate optional fields when provided", () => {
const data = {
...validFormData,
taxId: "123", // Invalid
vatId: "INVALID", // Invalid
website: "example.com", // Invalid (no protocol)
};
const errors = validateCompanyForm(data);
expect(errors.length).toBeGreaterThanOrEqual(3);
});
it("should accept valid optional fields", () => {
const data = {
...validFormData,
taxId: "1234567890",
vatId: "DE123456789",
website: "https://example.com",
};
const errors = validateCompanyForm(data);
const hasTaxIdError = errors.some(e => e.field === "taxId");
const hasVatIdError = errors.some(e => e.field === "vatId");
const hasWebsiteError = errors.some(e => e.field === "website");
expect(hasTaxIdError).toBe(false);
expect(hasVatIdError).toBe(false);
expect(hasWebsiteError).toBe(false);
});
it("should validate email format", () => {
const data = { ...validFormData, email: "invalid-email" };
const errors = validateCompanyForm(data);
const emailError = errors.find(e => e.field === "email");
expect(emailError).toBeDefined();
});
it("should accept valid email", () => {
const data = { ...validFormData, email: "test@example.com" };
const errors = validateCompanyForm(data);
const emailError = errors.find(e => e.field === "email");
expect(emailError).toBeUndefined();
});
it("should validate field length limits", () => {
const data = {
...validFormData,
name: "a".repeat(300), // Too long
phone: "a".repeat(30), // Too long
};
const errors = validateCompanyForm(data);
expect(errors.length).toBeGreaterThan(0);
});
});
describe("getFieldError", () => {
it("should return error message for field", () => {
const errors: ValidationError[] = [
{ field: "name", message: "Name required" },
{ field: "email", message: "Invalid email" },
];
expect(getFieldError("name", errors)).toBe("Name required");
expect(getFieldError("email", errors)).toBe("Invalid email");
});
it("should return null for field without error", () => {
const errors: ValidationError[] = [];
expect(getFieldError("name", errors)).toBeNull();
});
});
describe("hasFieldError", () => {
it("should return true if field has error", () => {
const errors: ValidationError[] = [
{ field: "name", message: "Name required" },
];
expect(hasFieldError("name", errors)).toBe(true);
expect(hasFieldError("email", errors)).toBe(false);
});
it("should return false for empty errors", () => {
expect(hasFieldError("name", [])).toBe(false);
});
});
});
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import { describe, it, expect } from "vitest";
import {
EINNAHME_KATEGORIEN,
EINNAHME_LABELS,
type EinnahmeKategorieKey,
} from "@/lib/einnahmen";
import {
AUSGABE_KATEGORIEN,
KATEGORIE_LABELS,
type AusgabeKategorieKey,
} from "@/lib/ausgaben";
describe("einnahmen.ts - Revenue Categories", () => {
it("should have all expected categories", () => {
expect(EINNAHME_KATEGORIEN).toContain("FUSSPFLEGE");
expect(EINNAHME_KATEGORIEN).toContain("PRIVATEINLAGEN");
expect(EINNAHME_KATEGORIEN).toContain("DARLEHEN");
expect(EINNAHME_KATEGORIEN).toContain("STEUERERSTATTUNGEN");
expect(EINNAHME_KATEGORIEN).toContain("ZINSERTRAEGE");
expect(EINNAHME_KATEGORIEN).toContain("VERMIETUNG_VERPACHTUNG");
expect(EINNAHME_KATEGORIEN).toContain("VERAEUSSERUNGSERLOES");
expect(EINNAHME_KATEGORIEN).toContain("EIGENVERBRAUCH");
expect(EINNAHME_KATEGORIEN).toContain("SONSTIGE_EINNAHMEN");
});
it("should have 10 revenue categories", () => {
expect(EINNAHME_KATEGORIEN).toHaveLength(10);
});
it("should have labels for all categories", () => {
EINNAHME_KATEGORIEN.forEach((key) => {
expect(EINNAHME_LABELS[key as EinnahmeKategorieKey]).toBeDefined();
expect(typeof EINNAHME_LABELS[key as EinnahmeKategorieKey]).toBe("string");
});
});
it("should have correct labels", () => {
expect(EINNAHME_LABELS.FUSSPFLEGE).toBe("Fußpflege/Verkauf/Gutscheine");
expect(EINNAHME_LABELS.PRIVATEINLAGEN).toBe("Privateinlagen");
expect(EINNAHME_LABELS.DARLEHEN).toBe("Darlehen");
expect(EINNAHME_LABELS.ZINSERTRAEGE).toBe("Zinserträge");
});
it("should have valid TypeScript types", () => {
const testKey: EinnahmeKategorieKey = "FUSSPFLEGE";
expect(testKey).toBe("FUSSPFLEGE");
});
});
describe("ausgaben.ts - Expense Categories", () => {
it("should have all expected categories", () => {
expect(AUSGABE_KATEGORIEN).toContain("WAREN_ROHSTOFFE");
expect(AUSGABE_KATEGORIEN).toContain("GERINGWERTIGE_WIRTSCHAFTSGUETER");
expect(AUSGABE_KATEGORIEN).toContain("ABSCHREIBUNGEN");
expect(AUSGABE_KATEGORIEN).toContain("MIETE");
expect(AUSGABE_KATEGORIEN).toContain("STROM_WASSER");
expect(AUSGABE_KATEGORIEN).toContain("TELEKOMMUNIKATION");
expect(AUSGABE_KATEGORIEN).toContain("FORTBILDUNG_MESSEN");
expect(AUSGABE_KATEGORIEN).toContain("BEITRAEGE");
expect(AUSGABE_KATEGORIEN).toContain("VERSICHERUNGEN");
expect(AUSGABE_KATEGORIEN).toContain("WERBEKOSTEN");
expect(AUSGABE_KATEGORIEN).toContain("ZINSEN");
expect(AUSGABE_KATEGORIEN).toContain("REISEKOSTEN");
expect(AUSGABE_KATEGORIEN).toContain("REPARATUREN_INSTANDHALTUNG");
expect(AUSGABE_KATEGORIEN).toContain("BUEROBEDARF");
expect(AUSGABE_KATEGORIEN).toContain("REPRAESENTATIONSKOSTEN");
expect(AUSGABE_KATEGORIEN).toContain("SONSTIGER_BETRIEBSBEDARF");
expect(AUSGABE_KATEGORIEN).toContain("NEBENKOSTEN_GELDVERKEHR");
});
it("should have 17 expense categories", () => {
expect(AUSGABE_KATEGORIEN).toHaveLength(17);
});
it("should have labels for all categories", () => {
AUSGABE_KATEGORIEN.forEach((key) => {
expect(KATEGORIE_LABELS[key as AusgabeKategorieKey]).toBeDefined();
expect(typeof KATEGORIE_LABELS[key as AusgabeKategorieKey]).toBe("string");
});
});
it("should have correct labels", () => {
expect(KATEGORIE_LABELS.WAREN_ROHSTOFFE).toBe("Waren, Rohstoffe, Hilfsstoffe");
expect(KATEGORIE_LABELS.GERINGWERTIGE_WIRTSCHAFTSGUETER).toBe(
"Geringwertige Wirtschaftsgüter"
);
expect(KATEGORIE_LABELS.MIETE).toBe("Miete");
expect(KATEGORIE_LABELS.ZINSEN).toBe("Zinsen");
});
it("should have valid TypeScript types", () => {
const testKey: AusgabeKategorieKey = "MIETE";
expect(testKey).toBe("MIETE");
});
});
describe("Category Integration", () => {
it("should not have overlapping keys between revenue and expenses", () => {
const overlap = EINNAHME_KATEGORIEN.filter((key) =>
AUSGABE_KATEGORIEN.includes(key as any)
);
expect(overlap).toHaveLength(0);
});
it("should have consistent naming convention (uppercase with underscores)", () => {
const validPattern = /^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$/;
EINNAHME_KATEGORIEN.forEach((key) => {
expect(key).toMatch(validPattern);
});
AUSGABE_KATEGORIEN.forEach((key) => {
expect(key).toMatch(validPattern);
});
});
});
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import { describe, it, expect, vi, beforeEach } from "vitest";
import prisma from "@/lib/prisma.server";
import { generateInvoiceNumber } from "@/lib/invoice-number.server";
// Mock the Prisma client
vi.mock("@/lib/prisma.server", () => ({
default: {
company: {
update: vi.fn(),
},
},
}));
describe("invoice-number.server.ts", () => {
beforeEach(() => {
vi.clearAllMocks();
});
it("should generate invoice number with year and sequence", async () => {
const mockCompany = {
invoicePrefix: "RE",
invoiceSequence: 5, // Already incremented by Prisma
};
(prisma.company.update as any).mockResolvedValue(mockCompany);
const result = await generateInvoiceNumber("company-123");
// invoiceSequence is already 5 (after increment), so we expect 005
expect(result).toBe("RE-2026-005");
expect(prisma.company.update).toHaveBeenCalledWith({
where: { id: "company-123" },
data: { invoiceSequence: { increment: 1 } },
select: { invoicePrefix: true, invoiceSequence: true },
});
});
it("should pad sequence with zeros", async () => {
const mockCompany = {
invoicePrefix: "RG",
invoiceSequence: 2, // Already incremented by Prisma
};
(prisma.company.update as any).mockResolvedValue(mockCompany);
const result = await generateInvoiceNumber("company-456");
expect(result).toBe("RG-2026-002");
});
it("should handle custom prefix", async () => {
const mockCompany = {
invoicePrefix: "INV",
invoiceSequence: 10, // Already incremented by Prisma
};
(prisma.company.update as any).mockResolvedValue(mockCompany);
const result = await generateInvoiceNumber("company-789");
expect(result).toBe("INV-2026-010");
});
});
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import { describe, it, expect } from "vitest";
import {
DEFAULT_AUSGABE_KATEGORIEN,
DEFAULT_EINNAHME_KATEGORIEN,
} from "@/lib/kategorie-defaults";
describe("kategorie-defaults.ts", () => {
describe("DEFAULT_AUSGABE_KATEGORIEN", () => {
it("should have 15 default expense categories", () => {
expect(DEFAULT_AUSGABE_KATEGORIEN).toHaveLength(15);
});
it("should include common expense categories", () => {
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Waren, Rohstoffe, Hilfsstoffe");
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Miete");
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Strom, Wasser");
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Telekommunikationskosten");
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Bürobedarf");
});
it("should include GERINGWERTIGE_WIRTSCHAFTSGÜTER", () => {
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Geringwertige Wirtschaftsgüter");
});
it("should include Abschreibungen", () => {
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Abschreibungen");
});
it("should include Zinsen", () => {
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Zinsen");
});
it("should include Reisekosten", () => {
expect(DEFAULT_AUSGABE_KATEGORIEN).toContain("Reisekosten");
});
it("should have unique values", () => {
const unique = new Set(DEFAULT_AUSGABE_KATEGORIEN);
expect(unique.size).toBe(DEFAULT_AUSGABE_KATEGORIEN.length);
});
it("should not have empty strings", () => {
DEFAULT_AUSGABE_KATEGORIEN.forEach((cat) => {
expect(cat).not.toBe("");
expect(cat.trim().length).toBeGreaterThan(0);
});
});
});
describe("DEFAULT_EINNAHME_KATEGORIEN", () => {
it("should have 9 default revenue categories", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toHaveLength(9);
});
it("should include Fußpflege category", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toContain("Fußpflege/Verkauf/Gutscheine");
});
it("should include Privateinlagen", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toContain("Privateinlagen");
});
it("should include Darlehen", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toContain("Darlehen");
});
it("should include Steuererstattungen", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toContain("Steuererstattungen");
});
it("should include Zinserträge", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toContain("Zinserträge");
});
it("should include Miet-/Pachteinnahmen", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toContain("Miet-/Pachteinnahmen");
});
it("should include Veräußerungserlöse", () => {
expect(DEFAULT_EINNAHME_KATEGORIEN).toContain("Veräußerungserlöse");
});
it("should have unique values", () => {
const unique = new Set(DEFAULT_EINNAHME_KATEGORIEN);
expect(unique.size).toBe(DEFAULT_EINNAHME_KATEGORIEN.length);
});
it("should not have empty strings", () => {
DEFAULT_EINNAHME_KATEGORIEN.forEach((cat) => {
expect(cat).not.toBe("");
expect(cat.trim().length).toBeGreaterThan(0);
});
});
});
describe("Category Integration", () => {
it("should not have overlapping categories between income and expenses", () => {
const overlap = DEFAULT_AUSGABE_KATEGORIEN.filter((cat) =>
DEFAULT_EINNAHME_KATEGORIEN.includes(cat)
);
expect(overlap).toHaveLength(0);
});
it("should have consistent German language", () => {
// Check that categories contain German umlauts or common German words
const allCategories = [
...DEFAULT_AUSGABE_KATEGORIEN,
...DEFAULT_EINNAHME_KATEGORIEN,
];
allCategories.forEach((cat) => {
expect(cat.length).toBeGreaterThan(0);
// Should not contain numbers at start (heuristic check)
expect(/^\d/.test(cat)).toBe(false);
});
});
it("should cover common business categories", () => {
// Expenses should cover: rent, utilities, telecom, office supplies
const expenseStr = DEFAULT_AUSGABE_KATEGORIEN.join(" ");
expect(expenseStr).toContain("Miete");
expect(expenseStr).toContain("Bürobedarf");
// Revenue should cover: services, loans, interest
const revenueStr = DEFAULT_EINNAHME_KATEGORIEN.join(" ");
expect(revenueStr).toContain("Darlehen");
expect(revenueStr).toContain("Zinserträge");
});
});
describe("Practical Usage", () => {
it("should be usable as default values for new companies", () => {
// Simulate creating default categories for a new company
const companyId = "new-company-123";
const defaultExpenseCategories = DEFAULT_AUSGABE_KATEGORIEN.map((name) => ({
companyId,
name,
typ: "AUSGABE" as const,
}));
const defaultRevenueCategories = DEFAULT_EINNAHME_KATEGORIEN.map((name) => ({
companyId,
name,
typ: "EINNAHME" as const,
}));
expect(defaultExpenseCategories).toHaveLength(15);
expect(defaultRevenueCategories).toHaveLength(9);
expect(defaultExpenseCategories[0].typ).toBe("AUSGABE");
expect(defaultRevenueCategories[0].typ).toBe("EINNAHME");
});
it("should allow adding custom expense categories", () => {
const customCategories: string[] = [
...DEFAULT_AUSGABE_KATEGORIEN,
"Custom Expense Category",
];
expect(customCategories.length).toBe(16); // 15 defaults + 1 custom
expect(customCategories[15]).toBe("Custom Expense Category");
});
});
});
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import {
currencySchema,
taxRateSchema,
ibanSchema,
taxIdSchema,
vatIdSchema,
invoiceSchema,
companySchema,
customerSchema,
} from "@/lib/schemas";
describe("schemas.ts - Zod Validation", () => {
describe("currencySchema", () => {
it("should accept valid currency values", () => {
expect(currencySchema.parse(0)).toBe(0);
expect(currencySchema.parse(100)).toBe(100);
expect(currencySchema.parse(99.99)).toBe(99.99);
expect(currencySchema.parse(1000.5)).toBe(1000.5);
});
it("should reject negative values", () => {
expect(() => currencySchema.parse(-1)).toThrow("Geldbeträge dürfen nicht negativ sein");
});
it("should reject more than 2 decimal places", () => {
expect(() => currencySchema.parse(1.999)).toThrow(
"Geldbeträge dürfen maximal 2 Dezimalstellen haben"
);
});
it("should accept exactly 2 decimal places", () => {
expect(currencySchema.parse(1.99)).toBe(1.99);
});
});
describe("taxRateSchema", () => {
it("should accept valid German tax rates", () => {
expect(taxRateSchema.parse(0)).toBe(0);
expect(taxRateSchema.parse(7)).toBe(7);
expect(taxRateSchema.parse(19)).toBe(19);
});
it("should reject invalid tax rates", () => {
expect(() => taxRateSchema.parse(5)).toThrow(
"Steuersatz muss 0 (steuerfrei), 7 (ermäßigt) oder 19 (Standard) sein"
);
expect(() => taxRateSchema.parse(20)).toThrow();
expect(() => taxRateSchema.parse(15)).toThrow();
});
it("should reject non-integer values", () => {
expect(() => taxRateSchema.parse(7.5)).toThrow("Steuersatz muss eine ganze Zahl sein");
});
});
describe("ibanSchema", () => {
it("should accept valid IBANs", () => {
expect(ibanSchema.parse("DE89370400440532013000")).toBe("DE89370400440532013000");
expect(ibanSchema.parse("AT611904300234573201")).toBe("AT611904300234573201");
expect(ibanSchema.parse("CH9300762011623852957")).toBe("CH9300762011623852957");
});
it("should accept empty string", () => {
expect(ibanSchema.parse("")).toBe("");
});
it("should reject invalid IBAN format", () => {
// No country code - starts with numbers
expect(() => ibanSchema.parse("1234567890")).toThrow();
// Too short - only 4 chars (need at least 5: 2 letters + 2 digits + 1)
expect(() => ibanSchema.parse("DE1")).toThrow();
});
});
describe("taxIdSchema", () => {
it("should accept valid 10-digit tax IDs", () => {
expect(taxIdSchema.parse("1234567890")).toBe("1234567890");
});
it("should accept empty string", () => {
expect(taxIdSchema.parse("")).toBe("");
});
it("should reject invalid tax IDs", () => {
expect(() => taxIdSchema.parse("123")).toThrow("Steuernummer muss 10 Ziffern haben");
expect(() => taxIdSchema.parse("12345678901")).toThrow();
expect(() => taxIdSchema.parse("abcdefghij")).toThrow();
});
});
describe("vatIdSchema", () => {
it("should accept valid DE VAT IDs", () => {
expect(vatIdSchema.parse("DE123456789")).toBe("DE123456789");
});
it("should accept empty string", () => {
expect(vatIdSchema.parse("")).toBe("");
});
it("should reject invalid VAT IDs", () => {
expect(() => vatIdSchema.parse("DE123")).toThrow(
"USt-IdNr. muss im Format DE + 9 Ziffern sein"
);
expect(() => vatIdSchema.parse("1234567890")).toThrow();
expect(() => vatIdSchema.parse("DE12345678")).toThrow();
});
});
describe("invoiceSchema", () => {
const validInvoice = {
companyId: "cm123abc",
customerId: "cm456def",
issueDate: "2026-05-08",
dueDate: "2026-06-08",
kleinunternehmer: false,
items: [
{
position: 1,
description: "Web Development",
quantity: 10,
unit: "Stunden",
unitPrice: 100,
taxRate: 19,
netAmount: 1000,
taxAmount: 190,
grossAmount: 1190,
},
],
netTotal: 1000,
taxTotal: 190,
grossTotal: 1190,
};
it("should accept valid invoice", () => {
const result = invoiceSchema.parse(validInvoice);
expect(result.companyId).toBe("cm123abc");
expect(result.items).toHaveLength(1);
});
it("should require at least one item", () => {
const invalid = { ...validInvoice, items: [] };
expect(() => invoiceSchema.parse(invalid)).toThrow(
"Mindestens ein Rechnungsposition erforderlich"
);
});
it("should accept optional deliveryDate", () => {
const withDelivery = { ...validInvoice, deliveryDate: "2026-05-07" };
expect(() => invoiceSchema.parse(withDelivery)).not.toThrow();
});
it("should reject invalid dates", () => {
const invalid = { ...validInvoice, issueDate: "not-a-date" };
expect(() => invoiceSchema.parse(invalid)).toThrow("Ungültiges Datum");
});
it("should accept optional notes with max length", () => {
const withNotes = { ...validInvoice, notes: "Test notes" };
expect(() => invoiceSchema.parse(withNotes)).not.toThrow();
});
});
describe("companySchema", () => {
const validCompany = {
name: "Test GmbH",
taxId: null,
vatId: null,
address: "Hauptstraße 1",
zip: "12345",
city: "Berlin",
country: "DE",
invoicePrefix: "RE",
kleinunternehmer: false,
bankIban: null,
// bankBic is optional, can be omitted or empty string
};
it("should accept valid company", () => {
const result = companySchema.parse(validCompany);
expect(result.name).toBe("Test GmbH");
});
it("should require name and address", () => {
const invalid = { ...validCompany, name: "" };
expect(() => companySchema.parse(invalid)).toThrow("Firmenname erforderlich");
});
it("should validate email format", () => {
const withEmail = { ...validCompany, email: "test@example.com" };
expect(() => companySchema.parse(withEmail)).not.toThrow();
});
it("should reject invalid email", () => {
const invalid = { ...validCompany, email: "not-an-email" };
expect(() => companySchema.parse(invalid)).toThrow("Ungültige E-Mail-Adresse");
});
it("should validate website starts with http/https", () => {
const withWebsite = { ...validCompany, website: "https://example.com" };
expect(() => companySchema.parse(withWebsite)).not.toThrow();
});
it("should reject website without protocol", () => {
const invalid = { ...validCompany, website: "example.com" };
expect(() => companySchema.parse(invalid)).toThrow(
"Website muss mit http:// oder https:// beginnen"
);
});
it("should accept valid IBAN", () => {
const withIban = { ...validCompany, bankIban: "DE89370400440532013000" };
expect(() => companySchema.parse(withIban)).not.toThrow();
});
});
describe("customerSchema", () => {
const validCustomer = {
companyId: "cm123abc",
name: "Max Mustermann",
address: "Musterstraße 1",
zip: "12345",
city: "Berlin",
country: "DE",
};
it("should accept valid customer", () => {
const result = customerSchema.parse(validCustomer);
expect(result.name).toBe("Max Mustermann");
});
it("should require companyId", () => {
const invalid = { ...validCustomer, companyId: "" };
expect(() => customerSchema.parse(invalid)).toThrow("Mandant erforderlich");
});
it("should validate zip code format", () => {
const invalid = { ...validCustomer, zip: "abc" };
expect(() => customerSchema.parse(invalid)).toThrow(
"PLZ darf nur Zahlen, Bindestriche und Leerzeichen enthalten"
);
});
});
});
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import {
TAX_RATES,
calcItemAmounts,
calcItemAmountsKleinunternehmer,
calcInvoiceTotals,
formatCurrency,
formatDate,
} from "@/lib/tax";
describe("tax.ts - German Tax Calculations", () => {
describe("TAX_RATES", () => {
it("should have correct tax rate values", () => {
expect(TAX_RATES).toEqual([
{ label: "19% MwSt. (Regelsteuersatz)", value: 19 },
{ label: "7% MwSt. (ermäßigt)", value: 7 },
{ label: "0% (steuerfrei / §13b UStG)", value: 0 },
]);
});
});
describe("calcItemAmounts", () => {
it("should calculate correct amounts for 19% tax", () => {
const result = calcItemAmounts(2, 100, 19);
expect(result).toEqual({
netAmount: 200,
taxAmount: 38,
grossAmount: 238,
});
});
it("should calculate correct amounts for 7% tax", () => {
const result = calcItemAmounts(1, 50, 7);
expect(result).toEqual({
netAmount: 50,
taxAmount: 3.5,
grossAmount: 53.5,
});
});
it("should handle tax-free items (0%)", () => {
const result = calcItemAmounts(3, 33.33, 0);
expect(result).toEqual({
netAmount: 99.99,
taxAmount: 0,
grossAmount: 99.99,
});
});
it("should handle decimal quantities", () => {
const result = calcItemAmounts(1.5, 100, 19);
expect(result).toEqual({
netAmount: 150,
taxAmount: 28.5,
grossAmount: 178.5,
});
});
it("should round to 2 decimal places", () => {
const result = calcItemAmounts(1, 33.333, 19);
// 33.333 * 19% = 6.333..., rounded to 6.33
expect(result.netAmount).toBe(33.33);
expect(result.taxAmount).toBe(6.33);
expect(result.grossAmount).toBe(39.66);
});
});
describe("calcItemAmountsKleinunternehmer", () => {
it("should set tax to 0 for Kleinunternehmer", () => {
const result = calcItemAmountsKleinunternehmer(2, 100);
expect(result).toEqual({
netAmount: 200,
taxAmount: 0,
grossAmount: 200,
});
});
it("should treat gross as net for Kleinunternehmer", () => {
const result = calcItemAmountsKleinunternehmer(1, 50);
expect(result.netAmount).toBe(50);
expect(result.grossAmount).toBe(50);
});
});
describe("calcInvoiceTotals", () => {
it("should sum up multiple invoice items", () => {
const items = [
{ netAmount: 100, taxAmount: 19, grossAmount: 119 },
{ netAmount: 50, taxAmount: 3.5, grossAmount: 53.5 },
];
const result = calcInvoiceTotals(items);
expect(result).toEqual({
netTotal: 150,
taxTotal: 22.5,
grossTotal: 172.5,
});
});
it("should handle empty items array", () => {
const result = calcInvoiceTotals([]);
expect(result).toEqual({
netTotal: 0,
taxTotal: 0,
grossTotal: 0,
});
});
it("should round totals to 2 decimal places", () => {
const items = [
{ netAmount: 33.333, taxAmount: 6.333, grossAmount: 39.666 },
{ netAmount: 66.666, taxAmount: 12.666, grossAmount: 79.332 },
];
const result = calcInvoiceTotals(items);
// calcInvoiceTotals uses Math.round which rounds 99.999 to 100
expect(result.netTotal).toBe(100);
expect(result.taxTotal).toBe(19);
expect(result.grossTotal).toBe(119);
});
it("should handle Kleinunternehmer invoice (no tax)", () => {
const items = [
{ netAmount: 100, taxAmount: 0, grossAmount: 100 },
{ netAmount: 200, taxAmount: 0, grossAmount: 200 },
];
const result = calcInvoiceTotals(items);
expect(result).toEqual({
netTotal: 300,
taxTotal: 0,
grossTotal: 300,
});
});
});
describe("formatCurrency", () => {
it("should format number to EUR currency", () => {
// Note: Intl.NumberFormat uses non-breaking space (\u00A0) before €
expect(formatCurrency(1234.56)).toBe("1.234,56\u00A0€");
});
it("should handle string input", () => {
expect(formatCurrency("999.99")).toBe("999,99\u00A0€");
});
it("should format zero correctly", () => {
expect(formatCurrency(0)).toBe("0,00\u00A0€");
});
});
describe("formatDate", () => {
it("should format Date object to German format", () => {
const date = new Date("2026-05-08");
expect(formatDate(date)).toBe("8.5.2026");
});
it("should format date string to German format", () => {
expect(formatDate("2026-12-31")).toBe("31.12.2026");
});
});
});