DOC-4094 hash examples (#3940)

* DOC-4094 added command examples for HGET and HSET

* Delete Bitfield_tutorial

---------

Co-authored-by: M Sazzadul Hoque <[email protected]>

Author: andy-stark-redis

src/test/java/io/redis/examples/CmdsHashExample.java

@@ -0,0 +1,333 @@
+// EXAMPLE: cmds_hash
+// REMOVE_START
+package io.redis.examples;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+// REMOVE_END
+// HIDE_START
+import redis.clients.jedis.UnifiedJedis;
+// HIDE_END
+
+// HIDE_START
+public class CmdsHashExample {
+    @Test
+    public void run() {
+        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
+
+        //REMOVE_START
+        // Clear any keys here before using them in tests.
+        jedis.del("myhash");
+        //REMOVE_END
+// HIDE_END
+
+
+        // STEP_START hdel
+
+        // STEP_END
+
+        // Tests for 'hdel' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hexists
+
+        // STEP_END
+
+        // Tests for 'hexists' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hexpire
+
+        // STEP_END
+
+        // Tests for 'hexpire' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hexpireat
+
+        // STEP_END
+
+        // Tests for 'hexpireat' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hexpiretime
+
+        // STEP_END
+
+        // Tests for 'hexpiretime' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hget
+        Map<String, String> hGetExampleParams = new HashMap<>();
+        hGetExampleParams.put("field1", "foo");
+
+        long hGetResult1 = jedis.hset("myhash", hGetExampleParams);
+        System.out.println(hGetResult1);    // >>> 1
+
+        String hGetResult2 = jedis.hget("myhash", "field1");
+        System.out.println(hGetResult2);    // >>> foo
+
+        String hGetResult3 = jedis.hget("myhash", "field2");
+        System.out.println(hGetResult3);    // >>> null
+        // STEP_END
+
+        // Tests for 'hget' step.
+        // REMOVE_START
+        Assert.assertEquals(1, hGetResult1);
+        Assert.assertEquals("foo", hGetResult2);
+        Assert.assertNull(hGetResult3);
+        jedis.del("myhash");
+        // REMOVE_END
+
+
+        // STEP_START hgetall
+
+        // STEP_END
+
+        // Tests for 'hgetall' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hincrby
+
+        // STEP_END
+
+        // Tests for 'hincrby' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hincrbyfloat
+
+        // STEP_END
+
+        // Tests for 'hincrbyfloat' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hkeys
+
+        // STEP_END
+
+        // Tests for 'hkeys' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hlen
+
+        // STEP_END
+
+        // Tests for 'hlen' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hmget
+
+        // STEP_END
+
+        // Tests for 'hmget' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hmset
+
+        // STEP_END
+
+        // Tests for 'hmset' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hpersist
+
+        // STEP_END
+
+        // Tests for 'hpersist' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hpexpire
+
+        // STEP_END
+
+        // Tests for 'hpexpire' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hpexpireat
+
+        // STEP_END
+
+        // Tests for 'hpexpireat' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hpexpiretime
+
+        // STEP_END
+
+        // Tests for 'hpexpiretime' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hpttl
+
+        // STEP_END
+
+        // Tests for 'hpttl' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hrandfield
+
+        // STEP_END
+
+        // Tests for 'hrandfield' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hscan
+
+        // STEP_END
+
+        // Tests for 'hscan' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hset
+        Map<String, String> hSetExampleParams = new HashMap<>();
+        hSetExampleParams.put("field1", "Hello");
+        long hSetResult1 = jedis.hset("myhash", hSetExampleParams);
+        System.out.println(hSetResult1);    // >>> 1
+
+        String hSetResult2 = jedis.hget("myhash", "field1");
+        System.out.println(hSetResult2);    // >>> Hello
+
+        hSetExampleParams.clear();
+        hSetExampleParams.put("field2", "Hi");
+        hSetExampleParams.put("field3", "World");
+        long hSetResult3 = jedis.hset("myhash",hSetExampleParams);
+        System.out.println(hSetResult3);    // >>> 2
+
+        String hSetResult4 = jedis.hget("myhash", "field2");
+        System.out.println(hSetResult4);    // >>> Hi
+
+        String hSetResult5 = jedis.hget("myhash", "field3");
+        System.out.println(hSetResult5);    // >>> World
+
+        Map<String, String> hSetResult6 = jedis.hgetAll("myhash");
+        
+        for (String key: hSetResult6.keySet()) {
+            System.out.println("Key: " + key + ", Value: " + hSetResult6.get(key));
+        }
+        // >>> Key: field3, Value: World
+        // >>> Key: field2, Value: Hi
+        // >>> Key: field1, Value: Hello
+        // STEP_END
+
+        // Tests for 'hset' step.
+        // REMOVE_START
+        Assert.assertEquals(1, hSetResult1);
+        Assert.assertEquals("Hello", hSetResult2);
+        Assert.assertEquals(2, hSetResult3);
+        Assert.assertEquals("Hi", hSetResult4);
+        Assert.assertEquals("World", hSetResult5);
+        Assert.assertEquals(3, hSetResult6.size());
+        Assert.assertEquals("Hello", hSetResult6.get("field1"));
+        Assert.assertEquals("Hi", hSetResult6.get("field2"));
+        Assert.assertEquals("World", hSetResult6.get("field3"));
+        jedis.del("myhash");
+        // REMOVE_END
+
+
+        // STEP_START hsetnx
+
+        // STEP_END
+
+        // Tests for 'hsetnx' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hstrlen
+
+        // STEP_END
+
+        // Tests for 'hstrlen' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START httl
+
+        // STEP_END
+
+        // Tests for 'httl' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+        // STEP_START hvals
+
+        // STEP_END
+
+        // Tests for 'hvals' step.
+        // REMOVE_START
+
+        // REMOVE_END
+
+
+// HIDE_START
+        
+    }
+}
+// HIDE_END
+