[일지] 2026.01.22

작업한 것

• TDD 연습
  • 스텁 구현 > 리팩토링 > 기능 구현

    // MoneyTest.java
    
    package com.inc.tdd_practice;
    
    import static org.junit.jupiter.api.Assertions.assertEquals;
    
    import org.junit.jupiter.api.Test;
    
    class MoneyTest {
        @Test
        public void testMultiplication() {
            Dollar five = new Dollar(5);
            Dollar product = five.times(2);
            assertEquals(10, product.amount);
            product = five.times(3);
            assertEquals(15, product.amount);
        }
    }
    
    // Dollar.java
    
    package com.inc.tdd_practice;
    
    class Dollar {
        int amount;
    
        Dollar(int amount) {
            this.amount = amount;
        }
    
        Dollar times(int multiplier) {
            return new Dollar(amount * multiplier);
        }
    }

마무리

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