DOC-4102 INCR command example (#3946)

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

@@ -0,0 +1,48 @@
+// EXAMPLE: cmds_string
+// REMOVE_START
+package io.redis.examples;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+// REMOVE_END
+// HIDE_START
+import redis.clients.jedis.UnifiedJedis;
+// HIDE_END
+
+// HIDE_START
+public class CmdsStringExample {
+    @Test
+    public void run() {
+        UnifiedJedis jedis = new UnifiedJedis("redis://localhost:6379");
+
+        //REMOVE_START
+        // Clear any keys here before using them in tests.
+        jedis.del("mykey");
+        //REMOVE_END
+// HIDE_END
+
+        // STEP_START incr
+        String incrResult1 = jedis.set("mykey", "10");
+        System.out.println(incrResult1);    // >>> OK
+
+        long incrResult2 = jedis.incr("mykey");
+        System.out.println(incrResult2);    // >>> 11
+
+        String incrResult3 = jedis.get("mykey");
+        System.out.println(incrResult3);    // >>> 11
+        // STEP_END
+
+        // Tests for 'incr' step.
+        // REMOVE_START
+        Assert.assertEquals("OK", incrResult1);
+        Assert.assertEquals(11, incrResult2);
+        Assert.assertEquals("11", incrResult3);
+        jedis.del("mykey");
+        // REMOVE_END
+
+// HIDE_START
+    }
+}
+// HIDE_END
+