@x47base/ch-finance-engine/__tests__/buchung.test.js

This package is an finance and accounting engine specificly made based on the swiss system.

import React from 'react';
import { render, fireEvent, screen } from '@testing-library/react';
import '@testing-library/jest-dom';

import Buchung from '../src/ui/buchung';
import Engine from '../src/models/engine';

jest.mock('../src/models/engine');

describe('Buchung Component', () => {
    let engine;
    let task;
    let correctSolution;

    beforeEach(() => {
        engine = new Engine();
        engine.accounts = [
            { code: 1000, name: 'Warenaufwand', aliases: [] },
            { code: 2000, name: 'Verbindlichkeiten L+L', aliases: [] },
            { code: 3000, name: 'Vorsteuer 1170', aliases: [] },
        ];
        Engine.mockImplementation(() => engine);

        task = {
            description: "Ein Lieferant stellt die Lieferung von verschiedenen Küchengeräten über CHF 3000 (inkl. 7,7 % Mehrwertsteuer) in Rechnung.",
            account1: "Warenaufwand",
            account2: "Verbindlichkeiten L+L",
            amount: 3000,
            currency: "CHF"
        };

        correctSolution = [
            { account1: "Warenaufwand", account2: "Verbindlichkeiten L+L", amount: 2785.71 },
            { account1: "Vorsteuer 1170", account2: "Verbindlichkeiten L+L", amount: 214.29 }
        ];
    });

    test('renders task description', () => {
        render(<Buchung task={task} correctSolution={correctSolution} />);

        expect(screen.getByText(task.description)).toBeInTheDocument();
    });

    test('adds and verifies correct buchungen', () => {
        render(<Buchung task={task} correctSolution={correctSolution} />);

        // Select account1
        fireEvent.change(screen.getAllByPlaceholderText('Enter account name or alias')[0], { target: { value: 'Warenaufwand' } });
        fireEvent.click(screen.getByText('Warenaufwand'));

        // Select account2
        fireEvent.change(screen.getAllByPlaceholderText('Enter account name or alias')[1], { target: { value: 'Verbindlichkeiten L+L' } });
        fireEvent.click(screen.getByText('Verbindlichkeiten L+L'));

        // Enter amount
        fireEvent.change(screen.getByPlaceholderText('Betrag'), { target: { value: '2785.71' } });

        // Add buchung
        fireEvent.click(screen.getByText('Buchung hinzufügen'));

        // Select account1
        fireEvent.change(screen.getAllByPlaceholderText('Enter account name or alias')[0], { target: { value: 'Vorsteuer 1170' } });
        fireEvent.click(screen.getByText('Vorsteuer 1170'));

        // Select account2
        fireEvent.change(screen.getAllByPlaceholderText('Enter account name or alias')[1], { target: { value: 'Verbindlichkeiten L+L' } });
        fireEvent.click(screen.getByText('Verbindlichkeiten L+L'));

        // Enter amount
        fireEvent.change(screen.getByPlaceholderText('Betrag'), { target: { value: '214.29' } });

        // Add buchung
        fireEvent.click(screen.getByText('Buchung hinzufügen'));

        // Verify feedback
        expect(screen.getByText('Alle Buchungen sind korrekt.')).toBeInTheDocument();
    });

    test('detects incorrect buchungen', () => {
        render(<Buchung task={task} correctSolution={correctSolution} />);

        // Select account1
        fireEvent.change(screen.getAllByPlaceholderText('Enter account name or alias')[0], { target: { value: 'Warenaufwand' } });
        fireEvent.click(screen.getByText('Warenaufwand'));

        // Select account2
        fireEvent.change(screen.getAllByPlaceholderText('Enter account name or alias')[1], { target: { value: 'Verbindlichkeiten L+L' } });
        fireEvent.click(screen.getByText('Verbindlichkeiten L+L'));

        // Enter amount
        fireEvent.change(screen.getByPlaceholderText('Betrag'), { target: { value: '9999' } });

        // Add buchung
        fireEvent.click(screen.getByText('Buchung hinzufügen'));

        // Verify feedback
        expect(screen.getByText(/Fehler in Buchung 1/)).toBeInTheDocument();
    });
});