TradeExecutorJUnit5Test

TradeExecutorJUnit5Test

package trp2.redonejunit5;


import static org.junit.Assert.assertTrue;
import static org.junit.jupiter.api.Assertions.assertThrows;

import org.junit.jupiter.api.Test;

class TradeExecutorJUnit5Test {

    @Test
    public void test_exception_for_null_trade_junit5() {

        //assemble
        TradeSender sender = trade -> false;
        TradeExecutor tradeExecutor = new TradeExecutor(sender);
        Trade nullTrade = null;

        //act
        Exception exception = assertThrows(Exception.class, () -> tradeExecutor.executeTrade(nullTrade));

        //assert
        String expectedMessage = "Invalid trade";
        String actualMessage = exception.getMessage();
        assertTrue(actualMessage.contains(expectedMessage));
    }




}

interface TradeSender {
    boolean sendTrade(Trade trade);
}

class TradeExecutor {
    private TradeSender sender;

    public TradeExecutor(TradeSender sender) {
        this.sender = sender;
    }

    public boolean executeTrade(Trade trade) throws Exception {
        if (trade == null)
            throw new Exception("Invalid trade");

        if (trade.getQuantity() % 100 != 0)
            return false;

        return this.sender.sendTrade(trade);
    }
}

class Trade {
    public int getQuantity() {
        return 0;
    }

    public Security getSecurity() {
        return null;
    }

    public Account getAccount() {
        return null;
    }
}

class Account {
}

class Security {
}