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Clock을 이용한 시간 테스트

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2025/01/24 05:52

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package tobyspring.hellospring.payment;

import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringExtension;

import java.io.IOException;
import java.math.BigDecimal;
import java.time.Clock;
import java.time.LocalDateTime;

import static java.math.BigDecimal.valueOf;
import static org.assertj.core.api.Assertions.assertThat;

@ExtendWith(SpringExtension.class)
@ContextConfiguration(classes = TestPaymentConfig.class)
class PaymentServiceSpringTest {

    // 의존 관계 주입
    @Autowired
    PaymentService paymentService;

    @Autowired
    Clock clock;

    @Autowired
    ExRateProviderStub exRateProviderStub;

    @Test
    void convertedAmount() throws IOException {
        // exRate: 1000
        Payment payment = paymentService.prepare(1L, "USD", BigDecimal.TEN);

        assertThat(payment.getExRate()).isEqualByComparingTo(valueOf(1_000));
        assertThat(payment.getConvertedAmount()).isEqualByComparingTo(valueOf(10_000));

        // exRate: 500
        exRateProviderStub.setExRate(valueOf(500));
        Payment payment2 = paymentService.prepare(1L, "USD", BigDecimal.TEN);

        assertThat(payment2.getExRate()).isEqualByComparingTo(valueOf(500));
        assertThat(payment2.getConvertedAmount()).isEqualByComparingTo(valueOf(5_000));
    }

    @Test
    void validUntil() throws IOException {
        // 실행
        Payment payment = paymentService.prepare(1L, "USD", BigDecimal.TEN);

        // valid until이 prepare() 30분 뒤로 설정됐는가?
        LocalDateTime now = LocalDateTime.now(this.clock);
        LocalDateTime expectedValidUntil = now.plusMinutes(30);

        Assertions.assertThat(payment.getValidUntil()).isEqualTo(expectedValidUntil);
    }
}
Java
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