├── README.md

├── pom.xml

└── src

    ├── main

    │ ├── java

    │ │ └── com

    │ │ └── dalong

    │ │ ├── Cache.java

    │ │ └── RedisBackedCache.java

    │ └── resources

    └── test

        └── java

            └── RedisTest.java

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0"

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

​

    <groupId>com.dalong</groupId>

    <artifactId>redit-test</artifactId>

    <version>1.0-SNAPSHOT</version>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <encoding>UTF-8</encoding>

        <java.version>1.8</java.version>

        <maven.compiler.source>1.8</maven.compiler.source>

        <maven.compiler.target>1.8</maven.compiler.target>

    </properties>

    <dependencies>

        <dependency>

            <groupId>redis.clients</groupId>

            <artifactId>jedis</artifactId>

            <version>3.0.1</version>

        </dependency>

        <dependency>

            <groupId>org.testcontainers</groupId>

            <artifactId>testcontainers</artifactId>

            <version>1.12.3</version>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.rnorth.visible-assertions</groupId>

            <artifactId>visible-assertions</artifactId>

            <version>2.0.0</version>

        </dependency>

        <dependency>

            <groupId>com.google.code.gson</groupId>

            <artifactId>gson</artifactId>

            <version>2.8.6</version>

        </dependency>

    </dependencies>

</project>

import com.dalong.Cache;

import com.dalong.RedisBackedCache;

import org.junit.Before;

import org.junit.Rule;

import org.junit.Test;

import org.testcontainers.containers.GenericContainer;

import redis.clients.jedis.Jedis;

​

import java.util.Optional;

​

import static org.rnorth.visibleassertions.VisibleAssertions.*;

​

public class RedisTest {

​

   //   核心使用GenericContainer 模拟redis 服务，同时使用了固定端口，使用jedis 访问

    @Rule

    public GenericContainer redis = new GenericContainer("redis:3.0.6")

            .withExposedPorts(6379);

    private Cache cache;

​

    @Before

    public void setUp() throws Exception {

        Jedis jedis = new Jedis(redis.getContainerIpAddress(), redis.getMappedPort(6379));

​

        cache = new RedisBackedCache(jedis, "test");

    }

​

    @Test

    public void testFindingAnInsertedValue() {

        cache.put("foo", "FOO");

        Optional<String> foundObject = cache.get("foo", String.class);

​

        assertTrue("When an object in the cache is retrieved, it can be found",

                foundObject.isPresent());

        assertEquals("When we put a String in to the cache and retrieve it, the value is the same",

                "FOO",

                foundObject.get());

    }

​

    @Test

    public void testNotFindingAValueThatWasNotInserted() {

        Optional<String> foundObject = cache.get("bar", String.class);

​

        assertFalse("When an object that's not in the cache is retrieved, nothing is found",

                foundObject.isPresent());

    }

}