DEV Community: Sree Lasya Vallabhaneni

Estimation

Sree Lasya Vallabhaneni — Thu, 27 Feb 2020 02:57:17 +0000

How do you estimate on a project or a task that you have never worked on before or have no idea what it takes to complete it?
I have some hard times where I underestimate the time and effort to finish a project and come under pressure that I am not completing it within the time I have committed to.

Looping in Puppet

Sree Lasya Vallabhaneni — Tue, 20 Aug 2019 21:35:52 +0000

A simple example of how to loop an array of hash maps in a puppet manifest to template

    targets => [
      {
        host => 'example.com',
        port => '443',
      },
      {
        host => 'example1.com',
        port => '8081',
      },
      {
        host => 'example2.com',
        port => '80',
      },
    ]

This part is for looping in the erb template.

<% @targets.each do |variable | -%>
    <%= variable['host'] %> <%= variable['port'] %> 
  <% end -%>

targets is the array of list and variable is the name of the varible you would like to specify

A handy selenium selector syntax in different languages

Sree Lasya Vallabhaneni — Fri, 16 Aug 2019 00:18:52 +0000

Java:
driver.get('http://google.com')
ID - driver.findElement(By.id("ui-div"));
CSS - driver.findElement(By.cssSelector("text-t"));
Xpath - driver.findElement(By.xpath("//div[@id ='ui-div']"));
Name - driver.findElement(By.name("element name"));
Link - driver.findElement(By.link("link"))
TagName - driver.findElement(By.tagName("tag name"))

Python:
driver.get('http://google.com')
ID - driver.find_element_by_id("idname")
CSS - driver.find_element_by_css_selector('body > div > button')
Xpath - driver.find_element_by_xpath('body/name')
Name - driver.find_element_by_name('username')

JavaScript:
driver.get('http://google.com')
ID - driver.findElement(webdriver.By.id("password"));
CSS - driver.findElement(webdriver.By.css('body > div > div));
Xpath - driver.findElement(webdriver.By.xpath('body/name'));
Name - driver.findElement(webdriver.By.name('q'));

c#
driver.Navigate().GoToUrl("http://www.google.com");
ID - driver.FindElementById("droppable");
CSS - driver.FindElementByXPath("//[@id =\"droppable\"]/p")
Xpath - driver.FindElementByCssSelector("div.form-actions > button")
Name - driver.FindElementByName("password")

Java Selenium Utilities that you can reuse

Sree Lasya Vallabhaneni — Fri, 16 Aug 2019 00:04:07 +0000

--Selenium Helper classes
--SeleniumUtilities.java

package test.java.SeleniumUtilities;
import java.net.MalformedURLException;
import java.net.URL;
import org.json.JSONObject;
import org.openqa.selenium.*;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;

public class SeleniumUtilities {
    private WebDriver driver;

/**
 * Created by SreeLasya.Vallabhanenion.
 */ 

    public SeleniumUtilities(WebDriver driver) {
        this.driver = driver;
    }


    /**
     * Wait for an element to be displayed in the DOM
     *
     * @param elementLocator - CSS of the element
     * @return - WebElement
     */

    public WebElement waitForElement(String elementLocator) {
        WebElement webElement = null;
        int timeout = 20; //in seconds
        WebDriverWait wait = new WebDriverWait(driver, timeout);
        try {
            System.out.println(elementLocator);
            webElement = wait.until(ExpectedConditions.visibilityOfElementLocated(By.cssSelector(elementLocator)));
        } catch (WebDriverException e) {
            //do nothing, don't want to log this
        }

        if (webElement == null) {
            assertFalse(true, "WebElement not found within " + timeout + " seconds. Failing test!" + " of element: " + elementLocator + "\nCurrent page: " + driver.getCurrentUrl());
        }
        return webElement;
    }


    public WebElement waitForElementPrescence(String elementLocator) {
        WebElement webElement = null;
        int timeout = 10; //in seconds
        WebDriverWait wait = new WebDriverWait(driver, timeout);
        try {
            System.out.println(elementLocator);
            webElement  = wait.until(ExpectedConditions.presenceOfElementLocated(By.cssSelector(elementLocator)));

        } catch (WebDriverException e) {
            //do nothing, don't want to log this
        }

        //if element wasn't found -> fail test
        if (webElement == null) {
            assertFalse(true, "WebElement not found within " + timeout + " seconds. Failing test!" + " of element: " + elementLocator + "\nCurrent page: " + driver.getCurrentUrl());
        }
        return webElement;
    }

    public void postUrl(String elementLocatorUrl) {
        try{
            driver.get(elementLocatorUrl);
        } catch (WebDriverException e) {
            System.out.println("Cannot get the requested url" + elementLocatorUrl);
        }
    }

    public void click(String elementLocator) {

        WebElement webElement = waitForElement(elementLocator);
        try {
        webElement.click();
        } catch(Exception ex) {

        }
    }

    public void enterText(String elementLocator, String text) {
        System.out.println(text);
        System.out.println(elementLocator);
        WebElement webElement = waitForElement(elementLocator);
        webElement.clear();
        webElement.sendKeys(text);
    }

    /**
     * Method to wait for page to update following an action that changes the pages state.
     * This is needed to avoid any race conditions between page updates and Selenium, which can sometimes occur.
     */

    public void waitForPageLoad() {
        try {
            Thread.sleep(250);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public void refreshPage() {

        String currentURL = getCurrentURL();
        driver.navigate().to(currentURL);
    }

    public String getCurrentURL() {
        return driver.getCurrentUrl();
    }

    public String getElementText(String elementLocator) {

        WebElement webElement = waitForElement(elementLocator);
        return webElement.getText();
    }
}

How to move items in terraform state without force replacement

Sree Lasya Vallabhaneni — Thu, 15 Aug 2019 23:33:39 +0000

I have started working on terraform very recently, One of the biggest annoying factors was when you have to change the terraform state without a forced replacement of the resource.

Terraform remembers a state which is nothing but how the infrastructure looks in the remote real world and in the local configuration.
So when you change a few attributes in the resource like name of the resource, instances, modules which are already created, in the plan it specifies that as not an in-place change

Thankfully there is a command that my colleague has mentioned is "mv"

This command is nothing but like a Linux mv command.

You need to specify source and destination:

terraform state mv aws_subnet.main aws_subnet-us-west-2c

This will move the existing terraform state to an updated terraform state and when you run a terraform plan, you should not see any infrastructure changes if done correctly.

For more information, you can refer: https://www.terraform.io/docs/commands/state/mv.html

Add aws credentials in terraform

Sree Lasya Vallabhaneni — Thu, 15 Aug 2019 00:41:12 +0000

Create a terraform.tfvars file in your terraform directory

If you give the name as mentioned above, terraform by default recognize that as a local environment file and you do not version control it.

Edit the file add these two variables

aws_access_key = "XXXXXXXXXXX"
aws_secret_key = "XXXX+XXXX"

In this way, you do not have to specifically mention the credentials every time you want to run:

terraform plan
terraform apply

If you create a file with a different name, you can pass the file name while running terraform commands

The above concept is keeping in mind AWS is the default provider and the credentials associated is the default user.