테스트 코드

테스트 코드 예시

package org.example;

import java.util.stream.Stream;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatCode;
import static org.junit.jupiter.params.provider.Arguments.arguments;


public class CalculatorTest {


    @DisplayName("덧셈 연산을 수행")
    @ParameterizedTest
    @MethodSource("formulaAndResult")
    void additionTest(int operand1, String operator, int operand2, int result) {
        Calculator calculator = new Calculator();
        int calculateResult = calculator.calculate(operand1, operator, operand2);
        assertThat(calculateResult).isEqualTo(result);
    }
    private static Stream<Arguments> formulaAndResult() {
        return Stream.of(
                arguments(1, "+", 2, 3),
                arguments(1, "-", 2, -1),
                arguments(4, "*", 2, 8),
                arguments(4, "/", 2, 2)
        );
    }

    @DisplayName("나눗셈에서 0을 나눈경우 익셉션 발생")
    @Test
    void wrongDivisionTest() {
        Calculator calculator = new Calculator();
        assertThatCode(() -> calculator.calculate(10, "/", 0)).isInstanceOf(IllegalArgumentException.class);

    }

}