1. you have MySQL server installed and it's up and running.
2. you have created a .env file in the project's root directory with required information, for example:

    PORT=3001
    HOST='localhost'
    DBUSER='node_client'
    PASSWORD='1234'
    DATABASE='dbname'
    DBPORT=3306
    DB_RANDOM_TABLE_NAME='tablename'
    DB_RANDOM_TABLE_NAME_JSON_FILE='tablename'

1. the MySQL database has tables in it.
2. the MySQL database has at least one table that has data in it and the name of this table must be written to DB_RANDOM_TABLE_NAME variable in .env file.
3. you have alltables.json and another json file in the test folder with exactly the same name specified in the DB_RANDOM_TABLE_NAME_JSON variable in .env file, for example 'tablename.json'.
4. alltables.json file has exactly the same table names that are in the database in json format, for example:


    [
    {
    "Table": "Table 1"
    },
    {
    "Table": "Table 2"
    },
    {
    "Table": "Table 3"
    },
    ...
    ]

5. the json-file written to DB_RANDOM_TABLE_NAME_JSON_FILE variable must have exactly the same table content that's in the table written to DB_RANDOM_TABLE_NAME variable in a json format for example:


    [
    {
    "id": 1,
    "name": "John Doe",
    "address": Gatepark 77,
    "email": "jd@bbbb.it"
    },
    {
    "id": 2,
    ...
    },
    ...
    ]