fix and improve step-by-step instructions: test, example, result

Author: jaehyeonpy

README.md

@@ -36,20 +36,30 @@ stop the elasticsearch container and modify /usr/share/elasticsearch/config/elas
 restart the elasticsearch container, and in the pymyelarepl container,
 
 ```
-(for test) cd pymyelarepl && python test/test.py
+(for test) cd pymyelarepl && python test/test_basic.py
 
-(after executing some sql in the mysql container, for example) cd pymyelarepl && python example/run.py
+
+(after executing the following sql in the mysql container as root without password, for example) cd pymyelarepl && python example/run.py
+
+CREATE DATABASE test;
+use test;
+CREATE TABLE test4 (id int NOT NULL AUTO_INCREMENT, data VARCHAR(255), data2 VARCHAR(255), PRIMARY KEY(id));
+INSERT INTO test4 (data, data2) VALUES ("Hello", "World");
+UPDATE test4 SET data="World", data2="Hello" WHERE id=1;
+DELETE FROM test4 WHERE id=1;
 ```
 
 
 <br>
 
-the results of the two cases are like the below, which means data is replicated successfully:
+the results of the two cases are similar to the below, which means data is replicated successfully:
 
 ```
 {'errors': False, 'took': 12, 'items': [{'create': {'_index': 'basic_replication', '_id': '1', '_version': 1, 'result': 'created', '_shards': {'total': 2, 'successful': 1, 'failed': 0}, '_seq_no': 6, '_primary_term': 1, 'status': 201}}, {'create': {'_index': 'basic_replication', '_id': '2', '_version': 1, 'result': 'created', '_shards': {'total': 2, 'successful': 1, 'failed': 0}, '_seq_no': 7, '_primary_term': 1, 'status': 201}}]}
 {'errors': False, 'took': 11, 'items': [{'update': {'_index': 'basic_replication', '_id': '1', '_version': 2, 'result': 'updated', '_shards': {'total': 2, 'successful': 1, 'failed': 0}, '_seq_no': 8, '_primary_term': 1, 'status': 200}}, {'update': {'_index': 'basic_replication', '_id': '2', '_version': 2, 'result': 'updated', '_shards': {'total': 2, 'successful': 1, 'failed': 0}, '_seq_no': 9, '_primary_term': 1, 'status': 200}}]}
 {'errors': False, 'took': 2, 'items': [{'delete': {'_index': 'basic_replication', '_id': '1', '_version': 3, 'result': 'deleted', '_shards': {'total': 2, 'successful': 1, 'failed': 0}, '_seq_no': 10, '_primary_term': 1, 'status': 200}}, {'delete': {'_index': 'basic_replication', '_id': '2', '_version': 3, 'result': 'deleted', '_shards': {'total': 2, 'successful': 1, 'failed': 0}, '_seq_no': 11, '_primary_term': 1, 'status': 200}}]}
+
+(blocked for the example)
 ```