use_for_loop_into_nightwatch.md

Use For loop into nightwatch

When you have many data (i.e Json format) and want to test by iterating it then you can use for loop for that.

You can not perform assertions directly into for loop.

For that you can use custom commands to perform your assertions. And custom commands called whitin for loop and passing approprite data.

Let's see by one example.

I have user details in json format. and want to test it by iterating it.

**Steps 1: Define global varibale for user details in before function. **

module.exports = {
    before: function(client) {
        client.globals.user_info = {"1":{"name":"User 1", "email":"[email protected]"}, "2":{"name":"User 2", "email":"[email protected]"}}
    },

**Steps 2: Create test case for testing user details. **

    '1. Check User Details' : function (client) {
        client.maximizeWindow()
        url( 'http://testurl.com/user_details' )
    	.waitForElementVisible( 'body', 1000 )
    	.click('#user_tab', function() {
            for( user_id in client.globals.user_info ) {
                client.checkUserInfo(client.globals.user_info, user_id); /* Call our custom command. */
            }
        })
        .end();
    }
} /* End of module.exports */

**Steps 3: Create custom command to test user details. **

Link: http://nightwatchjs.org/guide#writing-custom-commands

File name: checkUserInfo.js (Note: The command name is the name of the file itself)

exports.command = function(users, user_id, callback) {
    var self = this;
    /* Perform your assertions here. */
    return this;
 };