JavaAdventureRepo/test/cz/davza/studentadventure/objects/WalletTest.java

package cz.davza.studentadventure.objects;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

class WalletTest {

    @Test
    void startsWithGivenAmount() {
        Wallet wallet = new Wallet(50);
        assertEquals(50, wallet.getMoney());
    }

    @Test
    void earnMoneyIncreasesBalance() {
        Wallet wallet = new Wallet(10);
        wallet.earnMoney(20);
        assertEquals(30, wallet.getMoney());
    }

    @Test
    void spendMoneyReducesBalance() {
        Wallet wallet = new Wallet(50);
        boolean result = wallet.spendMoney(20);
        assertTrue(result);
        assertEquals(30, wallet.getMoney());
    }

    @Test
    void spendMoneyReturnsFalseWhenInsufficient() {
        Wallet wallet = new Wallet(10);
        boolean result = wallet.spendMoney(20);
        assertFalse(result);
    }

    @Test
    void balanceUnchangedAfterFailedSpend() {
        Wallet wallet = new Wallet(10);
        wallet.spendMoney(20);
        assertEquals(10, wallet.getMoney());
    }

    @Test
    void spendExactBalanceSucceeds() {
        Wallet wallet = new Wallet(20);
        assertTrue(wallet.spendMoney(20));
        assertEquals(0, wallet.getMoney());
    }

    @Test
    void defaultConstructorStartsAtZero() {
        Wallet wallet = new Wallet();
        assertEquals(0, wallet.getMoney());
    }
}