Tuesday, 24 January 2012

Different ways of developing automation tests



Recording Tests Using Windows Internet Explorer and Playing Back Using Mozilla Firefox

Using the Microsoft Visual Studio 2010 Feature Pack 2, you can use Windows Internet Explorer 7 (or later versions) to record UI actions on a website or a Web-based application and then play back the tests using the Mozilla Firefox browser
·         Coded UI Tests: You can create automated tests of the user interface (UI) known as coded UI tests. These tests provide functional testing of the user interface and validation of user interface controls. Coded UI tests let you test the functionality of a user interface. They are quicker to run than manual tests. Therefore, you can run them more frequently. Using the Microsoft Visual Studio 2010 Feature Pack 2, you can record UI actions on a website or on a Web-based application. You can create coded UI tests using Internet Explorer and then play back the tests using the Firefox browser.
For more information about coded UI tests, see Testing the User Interface with Automated UI Tests.
·         Manual Tests: You can create manual test cases to test your application. In a manual test case, you can document all the required test steps for a specific scenario and any other information that you must have to run the manual test. This might include attaching files to the manual test case. You must add your manual test cases to a test plan to be able to run them using Test Runner. By adding your manual test cases to a plan you can save the results every time that you run your test. Using the Microsoft Visual Studio 2010 Feature Pack 2, you can create an action recording for manual test steps that are performed on a website or on a Web-based application. You can record the tests using Internet Explorer and then play back the tests using the Firefox browser.
For more information about manual tests, see Creating Manual Test Cases and Running Manual Tests Using Test Runner.

If you want to run your coded UI tests remotely for your application, you must install the Microsoft Visual Studio 2010 Feature Pack 2 on any computer that has a test agent or a test controller that you will use to run the tests. For more information about how to run coded UI tests, see How to: Set Up Your Test Agent to Run Tests that Interact with the Desktop and Running Automated Tests.

If you want to build the test project that contains your Silverlight coded UI tests as part of team build using a build agent, you must install the Microsoft Visual Studio 2010 Feature Pack 2 on any computer that has a build agent that is used to build the test project. For more information about how to build and run tests, see How to: Configure and Run Scheduled Tests After Building Your Application.

The user could have multiple versions of Firefox installed and multiple languages of the same version of Firefox installed. The playback lets the user choose the version and language of Firefox on which the playback is supposed to occur. While doing playback using the Microsoft Test Runner, all the Firefox versions that are installed on the machine are displayed for the user to choose from. In case of CodedUITest, the user can set the BrowserWindow.CurrentBrowser environment attribute to any of the installed versions and playback will choose the designated Firefox version for playback.
For example, if you set BrowserWindow.CurrentBrowser = “Firefox 3.5.7 (ar)” playback will use the 3.5.7 Arabic Version of Firefox. Setting the CurrentBrowser property to “Firefox” would choose the default version of Firefox installed for playback. Check the registry key under HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox to find the names of all the Mozilla Firefox versions installed on your machine and use these names to set the CurrentBrowser property. You can also specify the CurrentBrowser property through CodedUITestCurrentBrowser Environment variable. Coded UI tests would read this environment variable and set the CurrentBrowser property itself as a part of test initialization. This is a better way to choose a browser for playback because it wouldn’t involve changing your coded UI test. Additionally, you can manipulate the browser for playback by using this environment variable.

Standered recording:
An analog recording is one where a property or characteristic of a physical recording medium is made to vary in a manner analogous to the variations in air pressure of the original sound. Generally, the air pressure variations are first converted (by a transducer such as a microphone) into an electrical analog signal in which either the instantaneous voltage or current is directly proportional to the instantaneous air pressure (or is a function of the pressure). The variations of the electrical signal in turn are converted to variations in the recording medium by a recording machine such as a tape recorder or record cutter—the variable property of the medium is modulated by the signal. Examples of properties that are modified are the magnetization of magnetic tape or the deviation (or displacement) of the groove of a gramophone disc from a smooth, flat spiral track.
A digital recording is produced by converting the physical properties of the original sound into a sequence of numbers, which can then be stored and read back for reproduction. Normally, the sound is transduced (as by a microphone) to an analog signal in the same way as for analog recording, and then the analog signal is digitized, or converted to a digital signal, through an analog-to-digital converter and then recorded onto a digital storage medium such as a compact disc or hard disk.
Both analog and digital systems have limitations. The bandwidth of the digital system is limited, according to the Nyquist frequency, by the sample rate used. The bandwidth of an analog system is limited by the physical capabilities of the analog circuits and recording medium. The signal-to-noise ratio (S/N) of a digital system is limited by the bit depth of the digitization process. In an analog system, other natural analog noise sources exist, such as flicker noise and imperfections in the recording medium.

QTP Low Level Recording Tutorial

You can switch to Low Level Recording mode only while recording a test. The option is not available while editing a test.
To record in Low Level Recording mode:
1.                  If you are not already recording, click the Record button to begin a recording session.
2.                  Click the Low Level Recording button or select Automation > Low Level Recording.
The record mode changes to Low Level Recording and all of your keyboard input and mouse clicks are recorded based on mouse coordinates. When QTP runs the test, the cursor retraces the recorded clicks.
3.                  When you are finished and want to return to normal recording mode, click the Low Level Recording button or selectAutomation > Low Level Recording to turn off the option.
The following examples illustrate the difference between the same operations recorded using normal mode and Low Level Recording mode.
Suppose you type the word tutorial into a user name edit box and then press the Tab key while in normal recording mode. Your test is displayed as follows in the Keyword View and Expert View:
Low Level recording-2


 Descriptive programming:

Introduction to Descriptive Programming.
How to write Descriptive Programming?
When and Where to use Descriptive programming?
Some points to note with 
Descriptive Programming.

Introduction to Descriptive Programming:Descriptive programming is used when we want to perform an operation on an object that is not present in the object repository. There can be various valid reason to do so. We will discuss them later in this article.

How to write Descriptive Programming? 

There are two ways in which descriptive programming can be used

1. By giving the description in form of the string arguments.
2. By creating properties collection object for the description.

1. By giving the description in form of the string arguments.

This is a more commonly used method for Descriptive Programming.
You can describe an object directly in a statement by specifying property:=value pairs describing the object instead of specifying an object’s
name. The general syntax is:

TestObject("PropertyName1:=PropertyValue1", "..." , "PropertyNameX:=PropertyValueX")

TestObject—the test object class could be WebEdit, WebRadioGroup etc….

PropertyName:=PropertyValue—the test object property and its value. Each property:=value pair should be separated by commas and quotation
marks. Note that you can enter a variable name as the property value if you want to find an object based on property values you retrieve during a run session.

Consider the HTML Code given below:

<--!input type="”textbox”" name="”txt_Name”"-->
<--!input type="”radio”" name="”txt_Name”"-->

Now to refer to the textbox the statement would be as given below

Browser(“Browser”).Page(“Page”).WebEdit(“Name:=txt_Name”,”html tag:=INPUT”).set “Test”

And to refer to the radio button the statement would be as given below

Browser(“Browser”).Page(“Page”).WebRadioGroup(“Name:=txt_Name”,”html tag:=INPUT”).set “Test”

If we refer to them as a web element then we will have to distinguish between the 2 using the index property

Browser(“Browser”).Page(“Page”).WebElement(“Name:=txt_Name”,”html tag:=INPUT”,”Index:=0”).set “Test” ‘ Refers to the textbox
Browser(“Browser”).Page(“Page”).WebElement(“Name:=txt_Name”,”html tag:=INPUT”,”Index:=1”).set “Test” ‘ Refers to the radio button

To determine which property and value pairs to use, you can use the Object Spy:
1. Go to Tools -> Object Spy.
2. Select the "Test Object Properties" radio button.
3. Spy on the desired object.
4. In the Properties list, find and write down the properties and values that can be used to identify the object.


2. By creating properties collection object for the description.

Properties collection also does the same thing as string arguments. The only difference is that it "collects" all the properties of a particular object in an instance of that object. Now that object can be referenced easily by using the instance, instead of writing "string arguments" again and again. It is my observation that people find "string arguments" [1] method much easier and intuitive to work with.
To use this method you need first to create an empty description
Dim obj_Desc ‘Not necessary to declare
Set obj_Desc = Description.Create

Now we have a blank description in “obj_Desc”. Each description has 3 properties “Name”, “Value” and “Regular Expression”.

obj_Desc(“html tag”).value= “INPUT”

When you use a property name for the first time the property is added to the collection and when you use it again the property is modified. By default each property that is defined is a regular expression. Suppose if we have the following description

obj_Desc(“html tag”).value= “INPUT”
obj_Desc(“name”).value= “txt.*”

This would mean an object with html tag as INPUT and name starting with txt. Now actually that “.*” was considered as regular expression. So, if you want the property “name” not to be recognized as a regular expression then you need to set the “regularexpression” property as FALSE

obj_Desc(“html tag”).value= “INPUT”
obj_Desc(“name”).value= “txt.*”
obj_Desc(“name”).regularexpression= “txt.*”

This is how we create a description. Now below is the way we can use it

Browser(“Browser”).Page(“Page”).WebEdit(obj_Desc).set “Test”

When we say .WebEdit(obj_Desc) we define one more property for our description that was not earlier defined that is it’s a text box (because QTPs WebEdit boxes map to text boxes in a web page).

If we know that we have more than 1 element with same description on the page then we must define “index” property for the that description

Consider the HTML code given below

<--!input type="”textbox”" name="”txt_Name”"-->
<--!input type="”textbox”" name="”txt_Name”"-->

Now the html code has two objects with same description. So distinguish between these 2 objects we will use the “index” property. Here is the description for both the object

For 1st textbox:
obj_Desc(“html tag”).value= “INPUT”
obj_Desc(“name”).value= “txt_Name”
obj_Desc(“index”).value= “0”

For 2nd textbox:
obj_Desc(“html tag”).value= “INPUT”
obj_Desc(“name”).value= “txt_Name”
obj_Desc(“index”).value= “1”

Consider the HTML Code given below:

<--!input type="”textbox”" name="”txt_Name”"-->
<--!input type="”radio”" name="”txt_Name”"-->

We can use the same description for both the objects and still distinguish between both of them
obj_Desc(“html tag”).value= “INPUT”
obj_Desc(“name”).value= “txt_Name”

When I want to refer to the textbox then I will use the inside a WebEdit object and to refer to the radio button I will use the description object with the WebRadioGroup object.

Browser(“Browser”).Page(“Page”).WebEdit(obj_Desc).set “Test” ‘Refers to the text box
Browser(“Browser”).Page(“Page”).WebRadioGroup(obj_Desc).set “Test” ‘Refers to the radio button

But if we use WebElement object for the description then we must define the “index” property because for a webelement the current description would return two objects.

Getting Child Object:

We can use description object to get all the objects on the page that matches that specific description. Suppose we have to check all the checkboxes present on a web page. So we will first create an object description for a checkboxe and then get all the checkboxes from the page

Dim obj_ChkDesc

Set obj_ChkDesc=Description.Create
obj_ChkDesc(“html tag”).value = “INPUT”
obj_ChkDesc(“type”).value = “checkbox”

Dim allCheckboxes, singleCheckBox

Set allCheckboxes = Browse(“Browser”).Page(“Page”).ChildObjects(obj_ChkDesc)

For each singleCheckBox in allCheckboxes

singleCheckBox.Set “ON”

Next

The above code will check all the check boxes present on the page. To get all the child objects we need to specify an object description.

If you wish to use string arguments [1], same thing can be accomplished by simple scripting.

Code for that would be:

i=0
Do While Browse(“Browser”).Page(“Page”).WebCheckBox("html tag:=INPUT",type:=checkbox, "index:="&i).Exist
Browse(“Browser”).Page(“Page”).WebCheckBox("html tag:=INPUT",type:=checkbox, "index:="&i).Set "ON"
i=i+1
Loop
Possible Operation on Description Objects

Consider the below code for all the solutions
Dim obj_ChkDesc

Set obj_ChkDesc=Description.Create
obj_ChkDesc(“html tag”).value = “INPUT”
obj_ChkDesc(“type”).value = “checkbox”

Q: How to get the no. of description defined in a collection
A: obj_ChkDesc.Count ‘Will return 2 in our case

Q: How to remove a description from the collection
A: obj_ChkDesc.remove “html tag” ‘would delete the html tag property from the collection

Q: How do I check if property exists or not in the collection?
A: The answer is that it’s not possible. Because whenever we try to access a property which is not defined its automatically added to the collection. The only way to determine is to check its value that is use a if statement “if obj_ChkDesc(“html tag”).value = empty then”.

Q: How to browse through all the properties of a properties collection?
A: Two ways
1st:
For each desc in obj_ChkDesc
Name=desc.Name
Value=desc.Value
RE = desc.regularexpression
Next
2nd:
For i=0 to obj_ChkDesc.count - 1
Name= obj_ChkDesc(i).Name
Value= obj_ChkDesc(i).Value
RE = obj_ChkDesc(i).regularexpression
Next

Hierarchy of test description:

When using programmatic descriptions from a specific point within a test object hierarchy, you must continue to use programmatic descriptions
from that point onward within the same statement. If you specify a test object by its object repository name after other objects in the hierarchy have
been described using programmatic descriptions, QuickTest cannot identify the object.

For example, you can use Browser(Desc1).Page(Desc1).Link(desc3), since it uses programmatic descriptions throughout the entire test object hierarchy.
You can also use Browser("Index").Page(Desc1).Link(desc3), since it uses programmatic descriptions from a certain point in the description (starting
from the Page object description).

However, you cannot use Browser(Desc1).Page(Desc1).Link("Example1"), since it uses programmatic descriptions for the Browser and Page objects but
then attempts to use an object repository name for the Link test object (QuickTest tries to locate the Link object based on its name, but cannot
locate it in the repository because the parent objects were specified using programmatic descriptions).


When and Where to use Descriptive programming?

Below are some of the situations when Descriptive Programming can be considered useful:

1. One place where DP can be of significant importance is when you are creating functions in an external file. You can use these function in various actions directly , eliminating the need of adding object(s) in object repository for each action[If you are using per action object repository]
2. The objects in the application are dynamic in nature and need special handling to identify the object. The best example would be of clicking a link which changes according to the user of the application, Ex. “Logout <>”.

3. When object repository is getting huge due to the no. of objects being added. If the size of Object repository increases too much then it decreases the performance of QTP while recognizing a object. [For QTP8.2 and below Mercury recommends that OR size should not be greater than 1.5MB]

4. When you don’t want to use object repository at all. Well the first question would be why not Object repository? Consider the following scenario which would help understand why not Object repository
Scenario 1: Suppose we have a web application that has not been developed yet.Now QTP for recording the script and adding the objects to repository needs the application to be up, that would mean waiting for the application to be deployed before we can start of with making QTP scripts. But if we know the descriptions of the objects that will be created then we can still start off with the script writing for testing
Scenario 2: Suppose an application has 3 navigation buttons on each and every page. Let the buttons be “Cancel”, “Back” and “Next”. Now recording action on these buttons would add 3 objects per page in the repository. For a 10 page flow this would mean 30 objects which could have been represented just by using 3 objects. So instead of adding these 30 objects to the repository we can just write 3 descriptions for the object and use it on any page.

5. Modification to a test case is needed but the Object repository for the same is Read only or in shared mode i.e. changes may affect other scripts as well.
6. When you want to take action on similar type of object i.e. suppose we have 20 textboxes on the page and there names are in the form txt_1, txt_2, txt_3 and so on. Now adding all 20 the Object repository would not be a good programming approach.



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