Challenges of Big Data | Hadoop training in Kukatpally

Big challenges of Big Data.

Challenges of Big Data

The name of Big Data concealed an astronomical amount of data produced everywhere. Anytime by men and machines to each action they perform.

Big challenges of Big Data.

This development is exploding because 90% of the available data made within the last 2 yrs. Big Data analyzed to find the insights that lead to raised decisions and proper business.

Focus on Reliable Data

The explosion in the quantity of available data. The task to split up the “signal” of “data” and “valuable information”. But, now, a whole lot of companies problem discovering the right data and deciding best use it. The fight “spam data” and data quality is an essential problem. Companies must think beyond the box to check out earnings models. that different from the original business.

Data Access

Data gain access to and connectivity is definitely an obstacle. McKinsey review implies that still a lot of data details linked today. and companies often don’t have the right websites to manage data across the business.

Embedding Organic Data

When the Big Data worried the “simple” data. The refined data currently complex and assorted. images, videos, representations of the physical world and the living world. It so, essential to rethink data tools architectures to store and data variety.

Better Assimilate Time Variable

The time sizing important obstacle for the introduction of Big Data in the permanent. then take care of accurate information in a sizable data stream. Finally, the challenge also develops in conditions of storage. The quantity of created data surpass the storage area capacities careful selection.

IT Architecture

The technology surroundings in the info world are changing. Providing valuable data means cooperation with a solid and groundbreaking technology partner. that create the right IT structures adjust to changes in the surroundings in a useful manner.

Security

Last, but, not minimal, we’ve security concern. Keeping such huge lake of the night out secure is a huge concern itself. But if companies limit data to gain access to predicated on a user’s need. The individual authentication for each team and team member able to access the info. An effective use of encryption on data, we can avoid a whole lot of problems.

The size available Big Data shifts in clinical, financial and political fields. But it additionally impacts the real human field.

Big challenges of Big Data

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Encapsulate Selenium Page Objects

 Encapsulation Page Objects in C-Sharp

Encapsulate Selenium Page Objects

Encapsulate Selenium Webpage Things understand the important Object Oriented Coding Rule. It very is necessary for us to put in place the same basic principle in the Test Framework as well. It helps to make the code more secure, readable and maintainable.

Encapsulation Page Objects in C-Sharp

Encapsulation in Java is a device of wrapping the info and code acting info single product. In encapsulation the variables of a course covered by other classes. It reached through the techniques of their current class, so also called data hiding.

To do encapsulation in Java

  • Declare the variables of a course as private.
  • Provide general population setter and getter methods alter and view the factors values.

Accessor – Get()

An accessor method employed to ask a subject about itself. In OOP, these are usually in the form of properties. that have, under normal conditions, a get method, which is an accessor method. But, accessor methods aren’t restricted to properties and any open public method. that provides information about the state of the object.

Mutator – Place()

Mutators are public methods. that used to change the state of a thing. While covering the implementation of exact data gets changed. Mutators are generally another part of the property reviewed, time around collection method. that let us the caller adjust the member data behind the moments.

Advantages
  • The fields of the class made read or write.
  • A course can have total control over stored in its domains.
  • The users of class do not know the category stores its data. A course can change the data kind of a field and users of the class do not need to change any of their code.
Encapsulate Selenium Web page Objects

Together with the above assumption in our Framework, we have to make all the Web page Items as Private.

[FindsBy(How = How.Identification, Using = “profile”)][CacheLookup] private IWebElement MyAccount get; place;

Execution of Encapsulation in Automation Framework

LogInTest.cs TestCase

HomePage PageObject Class

LogInPage PageObject Class

login page class Reason

 Login page class, we have not created any Accessor or Mutator for Username & Password field. Although all the properties have evolved to private now. The reason is, so far in the login test, we have not used Username & Password. The test calls the LoginToApplication() solution to do the thing. So the point could it be is not useful to create subject methods till the time test makes use of it. the PageObject course will end up with hundreds of object methods.

Encapsulation Page Objects in C-Sharp

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Use Hadoop for Data Science

  Reasons to use Hadoop for Data Science

Use Hadoop for Data Science

Apache Hadoop a central store for big data in the venture. This natural system with venture IT now applies data science to many business problems. such as product advice, fraud detection, and sentiment evaluation.

Reasons to use Hadoop for Data Science

Building on the patterns of Refine, Explore, Enrich. that we described in our Hadoop Patterns useful whitepaper. The review of the major reasons to use Hadoop for data technology Hadoop training in Kukatpally Hyderabad.

Reason 1: Data exploration with full datasets

Data researchers love their working environment. Whether using R, SAS, Matlab or Python. they always desire a laptop with lots of memory to analyze data and build models. In the world of big data, laptop recollection is never enough, and sometimes not even close.

A common approach is by using an example of the top dataset, a huge an example as can fit in recollection. Hadoop runs many exploratory data examination responsibilities on full datasets, without sampling. write a map-reduce job, PIG or HIVE script, start it on Hadoop over the entire dataset. The results right back to the laptop.

Reason 2: Mining larger datasets

Oftentimes, machine-learning algorithms achieve greater results. When the data to study from, particularly for techniques. such as clustering, outlier detection, and product recommenders.

large datasets weren’t available or very costly to get and store. so machine-learning practitioners required to innovative ways to improve models with limited datasets. that provides scalable storage and processing power. The data in RAW format, and use the entire dataset to create better, more exact models.

Reason 3: Large-scale pre-processing of uncooked data

 It data researchers data technology work is data acquisition, transformation, cleanup, and feature. This “pre-processing” step changes the data into a format by the machine-learning algorithm.

Hadoop is a perfect platform for implementing. This sort of pre-processing and large datasets. It using map-reduce or tools like PIG, HIVE, and scripting dialects like Python.

 if the application requires joining large billions of rows to generate feature vectors. The every single data object, HIVE or PIG useful and reliable for this job.

Reason 4: Data Agility

 That Hadoop “schema on reading”, instead of most traditional RDBMS systems. which need a strict schema meaning before any data inserted into them.

“Schema on reading” creates “data agility”:
Whenever data field not required task of schema redesign and migration in production. which can go for a few months. The positive impact ripples organization and everyone wants to use Hadoop project.

Reasons to use Hadoop for Data Science

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PageFactory CacheLookup

PageFactory CacheLookup in C-Sharp

 

PageFactory CacheLookup

PageFactory provides CacheLookup feature to cache the WebElements. This feature helps scripts to the InitElements method to cache the factor located. Any attribute marked will not search over and again. This is especially great for elements heading to be there PageFactory CacheLookup in C-Sharp.

PageFactory CacheLookup in C-Sharp

This means the elements of the site cached once searched. All elements found in the HomePage & login page static always present. So that it is way better to cache objects and save execution time of the test run selenium training in hyderabad.

How exactly to use PageFactory CacheLookup

If we know that element is actually present on the web page, it is advisable to use the next declaration:

[FindsBy(How = How.Id, Using = “account”)][CacheLookup] general population IWebElement MyAccount get; set;
 
PageFactory CacheLookup NameSpace

PageFactory features resides in OpenQA.Selenium.Support.PageObjects.CacheLookupAttribute.

How to Tool PageFactory CacheLookup in Framework

We will be using the same LogIn Scenario because of this. We enhancing circumstance and the end goal of the Selenium Automation Construction.

  • Change Web page Object

All we need to do here are to include PageFactory CacheLookup feature for every aspect. In HomePage school, we only need one component so far.

  • HomePage PageObject Class
  • LoginPage PageObject Class
  • Test for LogIN Functionality

The test case will stay same and continues to be as it is. It’s the benefit of pursuing Page Thing model that if there is any change in PageObject, the test remains same.

  • LogInTest.cs TestCase
  • Project Explorer
Notes
  1. If using the PageFactory, presume that the fields initialized. I don’t use the PageFactory, then NullPointerExceptions tossed. if make the assumption that the domains already initialized.
  2. List<WebElement> areas adorned if and only if they may have the @FindBy or @FindBys annotation. Default search strategy “by id or name”. that works for WebElement fields hardly well suited for lists. it rare to get several elements with the same id or name on a full page.
  3. WebElements evaluated. That never use a WebElement field in a PageObject, there won’t consider a call to “findElement” for it.
Advantages
  1. If the PageFactory initialized the proxies configured. the WebElements aren’t found at that time.
  2. Every time use a WebElement it’ll go and find. it again shouldn’t see StaleElementException’s.
  3. When using the @CacheLookup annotation. which is dropping the next benefit as it will find the factor. then keep a reference to it, actually far StaleElementExceptions. 
Dissimilarities between C# and Java Implementation
  1. In C# the PageFactory.InitElements returns void, while in Java it profits the Page Items.
  2. The PageFactory execution for C# only looks for elements using the Identification. It generally does not find the elements using the NAME property. While in Java it also will try to find the aspect of Name property, if it is unable to find it with ID.
  3. The Java implementation must locate the element even without the FindsBy attribute. This isn’t the case for C#.

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Selenium PageObjects and PageFactory in C#

 PageObjects and PageFactory in C#

PageObject Design Pattern

 The PageObject Design models areas of a UI as objects within test code. which considered as Object Repository for Web UI Elements PageObjects and PageFactory in C#.

PageObjects and PageFactory in C#

The classes in design represent a logical marriage between the web page application. Each class known as a PageObjects. it comes back other PageObjects to do the movement between pages. Site Object school is responsible to find the WebElements of this web page. The carry methods which perform operations on those WebElements.

Benefits of using Page Subject Pattern:

  •  Easy to keep up
  • Easy Readability of scripts
  • Reduce or End duplicacy
  • Re-usability of code
  • Reliability

PageFactory in C#

The PageFactory in C# Course is an extension to the Web page Object Design Design. It is an inbuilt POM concept for Selenium WebDriver but it’s very optimized. It initializes the components of the Page Subject or instantiates Page Objects itself. Annotations for elements created the explaining properties not be share subject from other.
It employed to Initialize Components of a Page school and ‘FindElement’ or ‘FindElements’. Annotations may supply descriptive titles of target objects to boost code readability.

Annotations

@FindBy Annotation
As the name suggests, it helps to get the elements in the web page using By strategy. @FindBy can accept TagName, PartialLinkText, Name, LinkText, Id, CSS, ClassName, XPath as attributes. An alternative device for seeking the factor or a list of elements. This enables users to create PageObjects.

[FindsBy(How = How.Id, Using = “username”)] private IWebElement UserName get; set;
The code will create a PageObject and name it as UserName by finding it which consists of ID locator.

InitElements

This Instantiate an example of the given school. This technique will attempt to instantiate the class directed at it. which takes a WebDriver occasion as its only debate or falling back over a no-arg. An exception thrown if the school can’t instantiate.
PageFactory.InitElements(WebDriver, PageObject);
Parameters:
  WebDriver – The driver used to research the elements
  PageObjects – A course initialised
PageFactory NameSpace
PageFactory features resides in OpenQA.Selenium.Support.PageObjects.

How to Install PageFactory in Selenium Framework

Create Home Page Objects

1. Create a fresh Folder and name it as PageObjects. This doing Right Select OnlineStore in the Job Solution and choose Add >> New Folder.
2. Create a New Class document and send it as HomePage. This can be done by doing Right Select PageObjects folder in the Project Solution and choose Add >> .

Create LogIN Web page Objects

1. Create a New Class record and send it to the login page.
2. LogIn web page has three important things to add, which we could interest in using in the test

Write Test for LogIN Functionality

1. Create a New Class record in the TestCases folder and refer it as login test. Then make a Test method in it with [Test] annotation of NUnit Framework.
2. Write the test using HomePage & login page objects.

PageFactory initializes

That type homePage in the test script and the moment press the dot, all the methods in the Home Page will screen. We are able to expose methods to reduce duplicated code. We’re able to call these method many times. This will ensure a much better maintainable test code. We make changes and improvements particular place.

Run the test from the Test Explorer and pageFactory initializes all the web page objects. That manage those objects to test to continued the execution.

 

 

 

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Using Debugging Tests in TestComplete Documentation | Selenium

 Using Debugging Tests in TestComplete Documentation

Debugging Tests – Overview

TestComplete includes two debuggers. the keyword test debugger and script debugger keyword lab tests and scripts. Debugging refers to test execution on the keyword test procedure or script lines. then running test in step with the execution, stopping on businesses or script lines. Each time the debugger ceases somewhere. there are several things it will enable to do, such on the check or change the principles of factors. But stopping before certain businesses or lines help in checking test is doing.

Requirements

The keyword-test and script debugging functionality made into TestComplete. It does not have any special requirements Using Debugging Tests in TestComplete Documentation.

Enabling the Debugger Functionality

The debugging features work when the Enable Debugging item examined. If the item unchecked the debugger is off.
Also, the debugger is off if TestComplete exposed in the Silent method.

 Using Debugging Tests in TestComplete Documentation

Operating Test Under Debugger
The script and keyword test debuggers are very like one another. They may have the same strategy used and talk about the same panels, dialogs and menu items. The debugger actions found from the Debug toolbar or shortcuts. The toolbar provides the execution selections of the debugger. Each one of these is the same as a Run button.

Differences between two Debuggers
  • First, on a new run, execution begins near the top of the first executed schedule or keyword test. But after each stop, it will continue at the collection or operation, at which the debugger quits.
  • Second, each execution choice is a different way of selecting the next line or operation. which the debugger will cut. Both main ways to debug a script are

                                       The debugger can stop before every executable line in the script or on any procedure of any keyword test. There are two modifications, tracing or stepping over. See Stepping Through Test.

                                       The debugger can run through the test from the current execution point. It without halting, to the series or operation that the cursor is on. Execution will stop on that series or procedure. That is one way of going right at the suspect code. See Running to the Cursor for more information. Remember that execution won’t stop until the end of the test run. if the cursor line or operation is never executed.

Breakpoints

Script lines and keyword-test procedures preset for the set backstop when attaining them. These lines called breakpoints. A breakpoint is a location set in script or keyword test where want the test to pause during execution. After the execution paused, the statute status of the test, its outcome, and its factors.
Setting a plain breakpoint equal to running to the cursor, except. That does not have to create the cursor at the script brand or operation have several breakpoints. conditional breakpoints, the debugger stops at that point in the run certain condition. Breakpoints work no subject execution managed from the Run button Script toolbar.

Activating Debugger During Test Run

 pause the execution of the script or keyword test by getting in touch with the Runner.Pause method. Also, if the Pause test execution on posting an error option allowed. TestComplete activates the debugger when an error message submitted to the test log. See Activating Debugger From Tests for complete information.

Evaluating Data During Debugging

 pause the test execution utilizing a breakpoint or any other method. I examine the value of script factors and expressions.

  • In the event debug a script device, relevant changing name the Code Editor.
  • Use the Test dialog find the worthiness of any appearance. It establishes with available factors and standard arithmetic and reasonable operators.
  • Use the Local people panel to explore the values of all variables defined for keyword test.
  • The -panel also screen the values of the routine’s or test’s parameters.
  • Use the List panel to create a list of the expressions evaluated each time the execution halts.
Looking at Call Stack

 The collection of script cell phone calls and keyword lab tests. that led to the current range executed using the decision Stack -panel. The list displayed in the order where the routines and tests executed. the most recent-called regimen at the very top.

Changing the Execution Flow

 the pause, execution the range or keyword test procedure execution. By using the feature omit or re-execute the desired test parts. Start the Environment Next Execution Point help topic for in-depth information.

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Exception Handling in Selenium Automation Framework

Exception Handling in Selenium

What is an Exception

An Exception event occurs during the execution of a program. that disrupts the standard movement of the program’s instructions or simple words. Any issue makes test case stop between execution is an Exception.

Difference between Error and Exception

 Error “indicates serious issues reasonable request should not make an effort to catch”. An Exception “indicates conditions a reasonable application should catch”.

Whenever an error occurs while performing a statement, creates an exception subject. then the normal movement of the program halts and it will try to find handle the increased exception. The exception thing contains a lot of debugging information. such as method hierarchy, series number exception occurred, kind of exception. the process of fabricating exception and handing runtime environment called “throwing the exception”.

 Exception Handling in Selenium

Exception handling refers to recognition, resolution of programming software, and communications errors. It’s the stop of code that processes the exception object and helps us by giving us a chance to act on it Exception Handling in Selenium.

Why Exception Handling is essential

1) Think about a predicament got an exception. so want to print some custom concept in logs, so that it can be understandable by the whole team.

2) Their situations want to eat up the exception and want the test to carry on with remaining execution.

3) To execute the group of steps on developing of the certain exception. I have an exception because a product has gone out of stock. that product is no longer exhibited on the site and choose another product available on the page.

4) In case want to take care of some certain kind of exception in Selenium. like ElementNotSelectableException, ElementNotVisibleException, NoSuchElementException. exclusions.

Different Exceptions in Selenium

There is a complete list of Exceptions stated on the Selenium Doc. which may or might not encounter in the span of testing.

Most common Exceptions:

1) NoSuchElementException: FindBy method can’t find the component.

2) StaleElementReferenceException :
This explains to that element is no longer showing up on the DOM page.

3) TimeoutException:
This explains to the execution failed. Because the command word did not complete in enough time.

4) ElementNotVisibleException:
Thrown to point that although an aspect is present on the DOM. it is not visible, so struggles interacted with

5) ElementNotSelectableException:
Thrown to point that may be the component disabled, so struggles to select.

The way to handle Exception

Try/Get: A method catches an exception by using a mixture of the try to get keywords. Try is the beginning of the block and Catch reaches the end of try stop to take care of the exceptions. A try/catch block located across the code that may create an exception. Code inside a try/catch block referred to as protected code,

Many Capture blocks: A try stop followed by many get blocks. there are many exceptions and expect more than one type of exception about the same code block. if like to handle each kind of exception with a separate block of code.

Throw:
The exception inside our code Selenium Automation Construction most of the time. we printing self-written logs, capture an exception and exception back to the system. so that the test case terminated. Throw keyword used to put the exception to the runtime to take care of it.

Throws: Whenever we are tossing any exception in a method and not controlling it. then we have to use throws keyword in method personal to let caller program know the exclusions. That thrown by the method.

Many Exceptions: We can offer many exclusions in the throws clause.

Finally: The final keyword employed to make a block of code that comes after a try block. A final block of code always executes, whether an exception has occurred.

Exception Handling in Selenium

 Selenium test can fail, but, not because of exceptions that thrown. In case your test is failing from exclusions. then most haven’t any exception handling. Using this method, you do not have the possibility to clean up the WebDriver object by the end of the test.

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TestNG Reporting | Selenium Web Driver

TestNG Reporting in Selenium Webdriver

 

TestNG Reporting

TestNG trials framework inspired from JUnit and NUnit. It introducing new functionalities that make it better and easier to use TestNG Reporting in Selenium Webdriver.

TestNG Reporting in Selenium Webdriver

In simple words, TestNG is an instrument that helps us to arrange the exams and help us to produce the test records. TestNG construction utilized for automation assessment with Selenium.

TestNG Advantages

  • Many built-in Annotations that happen to be easier to use and understand
  • Test method can be dependent on another method
  • Test circumstances Grouped and execute by groups
  • Parallel evaluation is possible
  • TestNG has built in HTML report and XML article generation facility. It has additionally built-in logging facility

How to use it…

1) The first step is to set up TestNG. It is easy to install TestNG, as it comes as a plugin for Eclipse IDE.
2) Make a ‘New class’ by right go through the ‘automationFramework’ bundle. then select TestNG > Make a TestNG Class and name it as TestNG_Platform.
3) Let’s take the prior Log4j_Logging_TC test case and separate the test case into three parts.
@BeforeMethod :
Configure Log4j XML, Open up Excel sheet, Kick off Firefox and immediate it to the bottom URL
@Test: Execute SIgnIn action and Log out
@AfterMethod : Close Firefox browser

TestNG Test

4) Run the test by right go through the test case script and choose Run As > TestNG Test.
5) it few minutes to complete the execution, completed the results in the Console window.
6) Click on the Results of TestNG tabs. It screens the total handed down, failed and skipped test with the time taken during the execution.
It exhibited ‘transferred: 1’. This means test is successful and Passed.
It discovers 3 sub tabs. “All Tests”, “Failed Lab tests” and “Summary”. click “All

Default Test

7) TestNG also produce HTML information. To gain access to those accounts go to your Project folder and wide open test-output folder.
8) Open up ’emailable-report.html’, as this is an HTML survey open up it with a web browser.
9) TestNG also produce ‘index.html’ survey and it resides in the same test-output folder. This review gives the connect to all the several elements of the TestNG information. like Groupings & Reporter End result. On clicking these will display detailed information of execution. In the advanced section of TestNG, we will go through each of the TestNG topics.

TestNG Reporting in Selenium Webdriver

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TestNG Parameters & Data Provider

TestNG Parameters & Data Provider in Selenium Webdriver

TestNG Parameters

The importance of Parameterization in trials and in automation screening. I operate a test circumstance many times with different insight and validation principles. As Selenium Webdriver an automated testing framework. when compared to a ready-to-use tool TestNG Parameters & Data Provider in Selenium Webdriver.

TestNG Parameters & Data Provider in Selenium Webdriver

The devote some effort to aid data driven screening in robotic tests. I usually opt to use Microsoft Excel as the format for holding my parameters. so many requested to create articles on TestNG Data Specialist.

TestNG again gives us another interesting feature called TestNG Guidelines. TestNG pass parameters right to test methods with testing.xml.

How to do it…

1) Generate a test on my demo OnlineStore application to execute LogIn. which calls for both string debate as username & security password.
2) Provide Username & Security password as the parameter using TestNG Annotation.

3) The parameter handed beliefs from testing.xml.

Now, run the testing.XML, which will run the parameter test method. TestNG will try to discover a parameter called username & password.

TestNG DataProviders

If want to pass complicated parameters or variables. that need to be created from Java, instances guidelines transferred using Data providers. A Data Specialist is a way annotated with @DataProvider. A Data Supplier returns a range of objects.

Let us browse the same Sign using Data providers.

How exactly to do it…

1) Define the method credentials() defined as a data provider using the annotation. This method returns the selection of object array.

2) Add a method test() to DataProviderTest course. This method requires two strings as source parameters.

3) Add the annotation @Test(data provider = “Authentication”) to this method. The attribute data provider mapped to “Authentication”.

TestNG Result

Run the test by right go through the test case script and choose Run As > TestNG Test. it completes the execution, finished the results can look such as this in the TestNG End result window.

 the test data provided two times, the mentioned test executed two times completely.

TestNG Parameters & Data Provider in Selenium Webdriver

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