spring-boot-demo/resilience/src/test/java/com/ankurm/resilience/ApiSurfaceTest.java

package com.ankurm.resilience;

import java.util.Arrays;

import org.junit.jupiter.api.Test;

import org.springframework.resilience.annotation.ConcurrencyLimit;
import org.springframework.resilience.annotation.EnableResilientMethods;
import org.springframework.resilience.annotation.Retryable;

import static org.assertj.core.api.Assertions.assertThat;

/** Defaults the article quotes, read from the annotations rather than from the documentation. */
class ApiSurfaceTest {

    @Test
    void retryableDefaults() throws Exception {
        assertThat(Retryable.class.getMethod("maxRetries").getDefaultValue()).isEqualTo(3L);
        assertThat(Retryable.class.getMethod("delay").getDefaultValue()).isEqualTo(1000L);
        assertThat(Retryable.class.getMethod("multiplier").getDefaultValue()).isEqualTo(1.0d);
        assertThat(Retryable.class.getMethod("timeout").getDefaultValue()).isEqualTo(0L);
    }

    @Test
    void concurrencyLimitHasTwoPolicies() {
        assertThat(Arrays.stream(ConcurrencyLimit.ThrottlePolicy.values()).map(Enum::name))
                .containsExactly("BLOCK", "REJECT");
    }

    @Test
    void enableResilientMethodsOrderIsLowestMinusOne() throws Exception {
        assertThat(EnableResilientMethods.class.getMethod("order").getDefaultValue()).isEqualTo(Integer.MAX_VALUE - 1);
    }
}