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Monday, October 8, 2012

How Does Run time data (Parameterization) is handled in QTP?

Efficient run time data handling is quite important for proper test automation through quick test professional. In this article we take up discussion regarding how run time data is parameterized or handled during a run session in quick test professional.
The parameterization of run time data is necessary in quick test professional  as it enhances test components. 

What happens in Run-time Data Parameterization?

- In run time data parameterization or handling, a variable is passed as a parameter or an argument via an external source which is generally a generator in most of the cases. 
- This variable or parameter which is passed essentially consists of a value that is assigned via the generator as mentioned in the previous line. 
- The parameterization of the variables in the test component can be done in a series of different check points as well as in a series of a set of different steps as it is required by the situation.
- Apart from normal values, the parameterization of the action data values can also be done. 
- For parameterizing the same value in a series of several steps the data driven wizard can be used.  

How it is handled in QTP?

- Quick test professional test automation suite comes with an in built integrated spread sheet when the run time data table is filled up with the test data. 
- This spread sheet is just like the excel spread sheet and thus multiple test iterations can be created which in turn will save you a big deal on the side of programming efforts. 
- The run time data can be entered either manually or in an automatic way by importing the data from the spread sheets, text files, data bases and so on. 
The spread sheets in quick test professional come with full functionality as that of the excel spread sheets. 
- Using these spread sheets following tasks can be achieved:
  1. Manipulation of the data sets
  2. Creation of multiple iterations of the tests
  3. Expanding test coverage without unnecessary programming and so on.
- In simple form, parameterization can be defined as providing multiple test data or inputs to the tests. 
- While working on quick test professional, input can be supplied in the below mentioned 4 ways:
  1. Input through note pad
  2. Input through key board
  3. Input or import via a data base
  4. Input through excel spread sheet.

What is Run Time Data

Run time data is nothing but a live version of the data that has a current association with the test that is currently under execution. 
There are two methods available for the parameterization of the run time data as mentioned below:
  1. DTSheet.GetParameter: with this parameterization method the specified parameter can be retrieved from the run time data table.
  2. DTSheet.AddParameter: with this parameterization method a new column is added.
Properties of Run-Time Data
  1. Name property: It defines the name of the column in the run time data table.
  2. Raw value property: It defines the raw value of a cell residing in the current row of the parameter under consideration. The actual string written in the cell before computation is called the raw value for example actual text present in some formula.
  3. Value property: This is the default property of the parameter and used for retrieving as well as setting the value of the cell of the active row in run time data table.
  4. Value by row property: It is used for retrieving the value of the in the row specified by the parameter.  

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