spring-data-jpa - Spring Boot TestContainers映射的端口只能在容器启动后获得

Question

我正在尝试使用TestContainers库将自动化测试添加到我的Spring Boot项目中

这是测试我的jpa存储库的测试类:

package com.ubm.mfi.repo;

import com.ubm.mfi.domain.MasterFileIndexRow;
import org.junit.ClassRule;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.boot.test.util.TestPropertyValues;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringExtension;
import org.testcontainers.containers.PostgreSQLContainer;
import org.testcontainers.junit.jupiter.Testcontainers;

import java.util.List;

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

@ExtendWith(SpringExtension.class)
@DataJpaTest
@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
@Testcontainers
@ContextConfiguration(initializers = { MasterFileIndexRowRepoTest.Initializer.class })
public class MasterFileIndexRowRepoTest {

    @ClassRule
    public static PostgreSQLContainer<?> postgreSQLContainer = new PostgreSQLContainer<>("postgres:latest");

    @Autowired
    private MasterFileIndexRowRepo masterFileIndexRowRepo;

    // write test cases here
    @Test
    public void whenFindAllRows_thenSizeIsGreaterThanZero() {
        // when
        List<MasterFileIndexRow> rows = masterFileIndexRowRepo.findAll();

        // then
        assertThat(rows.size())
                .isGreaterThan(0);
    }

    static class Initializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

        @Override
        public void initialize(ConfigurableApplicationContext configurableApplicationContext) {

            TestPropertyValues
                    .of("spring.datasource.url=" + postgreSQLContainer.getJdbcUrl(),
                            "spring.datasource.username=" + postgreSQLContainer.getUsername(),
                            "spring.datasource.password=" + postgreSQLContainer.getPassword())
                    .applyTo(configurableApplicationContext.getEnvironment());

        }

    }

}

这是我的build.gradle中的依赖项

testCompile "org.testcontainers:testcontainers:1.14.1"
testCompile "org.testcontainers:postgresql:1.14.1"

运行测试时出现以下错误: Caused by: java.lang.IllegalStateException: Mapped port can only be obtained after the container is started
从我所看到的，容器应该在开始测试时启动，有人知道我所缺少的吗？

Answer 1

您正在尝试将PostgresSQLContainer用作JUnit ClassRule，但是您对@ExtendWith的使用似乎表明您正在使用不支持JUnit 4规则的JUnit 5/Jupiter。

改用Testcontainers的JUnit 5集成:https://www.testcontainers.org/test_framework_integration/junit_5/