testcontainers-java

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package quickstart;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import org.testcontainers.containers.GenericContainer;
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import org.testcontainers.junit.jupiter.Container;
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import org.testcontainers.junit.jupiter.Testcontainers;
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import org.testcontainers.utility.DockerImageName;
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import static org.assertj.core.api.Assertions.assertThat;
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// class {
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@Testcontainers
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public class RedisBackedCacheIntTest {
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    private RedisBackedCache underTest;
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    // container {
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    @Container
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    public GenericContainer redis = new GenericContainer(DockerImageName.parse("redis:6-alpine"))
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        .withExposedPorts(6379);
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    // }
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    @BeforeEach
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    public void setUp() {
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        String address = redis.getHost();
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        Integer port = redis.getFirstMappedPort();
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        // Now we have an address and port for Redis, no matter where it is running
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        underTest = new RedisBackedCache(address, port);
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    }
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    @Test
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    public void testSimplePutAndGet() {
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        underTest.put("test", "example");
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        String retrieved = underTest.get("test");
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        assertThat(retrieved).isEqualTo("example");
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    }
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}
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// }
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