Rework the delete everything in Redis example

2020-05-22 12:42:39 +01:00
parent 8c987e89c9
commit 8a771a8b46
6 changed files with 94 additions and 107 deletions
@@ -0,0 +1,91 @@
+package com.baeldung.redis.deleteeverything;
+
+import org.junit.*;
+import redis.clients.jedis.Jedis;
+import redis.embedded.RedisServer;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+public class DeleteEverythingInRedisIntegrationTest {
+    private Jedis jedis;
+    private RedisServer redisServer;
+    private int port;
+
+    @Before
+    public void setUp() throws IOException {
+
+        // Take an available port
+        ServerSocket s = new ServerSocket(0);
+        port = s.getLocalPort();
+        s.close();
+
+        redisServer = new RedisServer(port);
+        redisServer.start();
+
+        // Configure JEDIS
+        jedis = new Jedis("localhost", port);
+    }
+
+    @After
+    public void destroy() {
+        redisServer.stop();
+    }
+
+    @Test
+    public void whenPutDataIntoRedis_thenCanBeFound() {
+        String key = "key";
+        String value = "value";
+
+        jedis.set(key, value);
+        String received = jedis.get(key);
+
+        assertEquals(value, received);
+    }
+
+    @Test
+    public void whenPutDataIntoRedisAndThenFlush_thenCannotBeFound() {
+        String key = "key";
+        String value = "value";
+
+        jedis.set(key, value);
+
+        jedis.flushDB();
+
+        String received = jedis.get(key);
+
+        assertNull(received);
+    }
+
+    @Test
+    public void whenPutDataIntoMultipleDatabases_thenFlushAllRemovesAll() {
+        // add keys in different databases
+        jedis.select(0);
+        jedis.set("key1", "value1");
+        jedis.select(1);
+        jedis.set("key2", "value2");
+
+        // we'll find the correct keys in the correct dbs
+        jedis.select(0);
+        assertEquals("value1", jedis.get("key1"));
+        assertNull(jedis.get("key2"));
+
+        jedis.select(1);
+        assertEquals("value2", jedis.get("key2"));
+        assertNull(jedis.get("key1"));
+
+        // then, when we flush
+        jedis.flushAll();
+
+        // the keys will have gone
+        jedis.select(0);
+        assertNull(jedis.get("key1"));
+        assertNull(jedis.get("key2"));
+        jedis.select(1);
+        assertNull(jedis.get("key1"));
+        assertNull(jedis.get("key2"));
+    }
+}