QTP Training Session4 Control Structures

7/27/2019 QTP Training Session4 Control Structures

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Quick Test Professional - QTPSession -4VeriTest, Chennai.


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Session-4: Agenda

QTP Scripting languageDeclaring variables

Operators

If statement overview

Case statement overview

For statement overview

While & do While loop overview

Functions overview

Call Statement

Procedure overview

Difference between functions & procedures

Creating a library file

SystemUtil Object

Q&A


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QTP Scripting Language

VB Scripting language is used in QTP

Not Case Sensitive


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Declaring Variables

Variables can be declared explicitly in the script using

1. Dim statement

2. Public statement

3. Private statement

For example,

Dim Degrees


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Operators

Arithmetic operators

example: +, -, *, /

Assignment operators

example: =

Comparison operators

example:


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If statement overview

Conditionally executes a group of statements, depending on the value of

an expression.

Syntax:

Ifcondition Then

statements[Else elsestatements]

End If

Eg:

OrderNo = InputBox("Enter Order Number")If OrderNo


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Select Case statement overview

Executes one of several groups of statements, depending on the value of an

expression.

SYNTAX

Select Case testexpression

[Case expressionlist-n

[statements-n]] . . .

[Case Else expressionlist-n

[elsestatements-n]]

End Select

Arguments

Testexpression: Any numeric or string expression.


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Select Case statement overview Contd.

expressionlist-n: Required ifCase appears. Delimited list of one or more

expressions.

statements-n: One or more statements executed if testexpression matches anypart of expressionlist-n.

elsestatements-n: One or more statements executed if test expression doesn'tmatch any of the Case clauses.


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Select Case statement overview[Contd]

Eg:

Dim Color,

MyVar = InputBox("Enter any color")

Select Case MyVar

Case"red" MsgBox The color is Red

Case"green" MsgBox The color is Green

Case"blue" MsgBox The color is Blue

Case ElseMsgBox "pick another color

End Select End Sub


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For Statement

Repeats a group of statements a specified number of times.SYNTAX

For counter= start To end [Step step]

[statements]

[Exit For]

[statements]Next

Arguments

Counter :Numeric variable used as a loop counter.Start : Initial value of counter.

End : Final value of counter.

Step : Amount counter is changed each time through the loop . If not

specified, step defaults to one.

The step argument can be either positive or negative.


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For Statement(contd.)

Statements: One or more statements between For and Next that are executed

the specified number of times.

Eg:

For I = 1 To 10

For J = 1 To 10

For K = 1 To 10

. . .

Next

Next

Next


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DO While Loop Statement Repeats a block of statements while a condition is True or until a condition

becomes True.

Syntax:

Do [{While | Until} condition]

[statements]

[ExitDo]

[statements]

Loop


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DO While Loop Statement Contd.

Arguments

condition

-Numeric or string expression that is True or False. If condition is Null,condition is treated as False.

statements

- One or more statements that are repeated while or until condition is True.


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DO While Loop Example

Do While Counter < 20

Counter = Counter + 1

If Counter = 10 Then

Check = False

Loop


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WhileWend Statement

Executes a series of statements as long as a given condition is True.

Whilecondition

[statements]

Wend

Arguments

condition

- Numeric or string expression that evaluates to True orFalse. Ifcondition

is Null, condition is treated as False.

statements

- One or more statements executed while condition is True.


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WhileWend Statement Example

Eg:

Dim Counter

Counter = 0

While Counter < 20

Counter = Counter + 1

Msgbox Counter

Wend


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Exit Statement

Exit statement:

Exits a block ofDo...Loop, For...Next, Function, orSub code.

Exit Do

Exit For

Exit Function

Exit Sub


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Functions Overview

Function: A name that define the behavior/ or a collection of the statementthat on complete execution return some value to the caller

The creation of function starts with the Function keyword and closes with

End Function.

SYNTAX

[Public [Default] | Private] Function name [(arglist)]

[statements]

[name = expression]

[Exit Function][statements]

[name = expression]

End Function


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Function Example

Example:

Function MyFunction(text)

MsgBox text

End Function

Call MyFunction("Hello World")


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Call Statement

SYNTAX for Call Statement :

[Call] name [argumentlist]

Arguments

Call

- Optional keyword. If specified, you must enclose argumentlist inparentheses. For example: Call MyProc(0)

name

- Required. Name of the procedure to call.

argumentlist

- Optional. Comma-delimited list of variables, arrays, or expressions to passto the procedure.


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Procedures

Procedure :

Procedure is a sub-routine and return no value

SYNTAX:

[Public [Default] | Private] Sub name [(arglist)]

[statements]

[Exit Sub]

[statements]

End Sub


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Procedure Example

Eg:

Sub CalcAndShowSalary(Hours, Salary)

Dim dblResult

dblResult = Hours * Salary

txtResult = dblResult

End Sub

Call CalcAndShowSalary(dblHours, dblSalary)


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Procedures Vs Functions

Function Procedure

Returns a Value Returns No Value


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SystemUtil Object

SystemUtil object used to control applications and processes during a runsession

SystemUtil.Run method

You can run any application from a specified location using aSystemUtil.Run statement

Ex:

Systemutil.run"E:\Program Files\HP\QuickTestProfessional\samples\flight\app\flight4a.exe","","E:\ProgramFiles\HP\QuickTest Professional\samples\flight\app\flight4a.exe"


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Message Box and Input Box Function

Message Box Function:

Displays a message in a dialog box, waits for the user to click a button, andreturns a value indicating which button the user clicked.

Syntax:

MsgBox(prompt[,buttons][, title][, helpfile, context])

MsgBox Constants:

vbOKOnly - Displays OK button only

vbOKCancel - Displays OK and Cancel buttons.

vbYesNoCancel - Displays Yes, No, and Cancel buttons.

vbCritical - Displays Critical Message icon.


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Message Box and Input Box Function Contd..

Example:

MyVar = MsgBox ("Click no if you are not able to rectify ", vbyesno,"Please check ")

Input Box Function:

Displays a prompt in a dialog box, waits for the user to input text or click abutton, and returns the contents of the text box.

Syntax:

InputBox(prompt[, title][, default][, xpos][, ypos][, helpfile, context])

Example:

Dim Input

Input = InputBox("Enter your name")

MsgBox ("You entered: " & Input)


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What is library

A collection of subroutines and functions stored in one or more files, usuallyin compiled form, for linking with other programs.

Libraries are linked with the user's program to form a complete executableprogram.


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How to create a library file

In QTP,Choose File > New > Function Library

Write functions and procedures in the library file

Save the library file with the extension .vbs


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Associating a Function Library

Open a new test or existing test.

Click File > Settings > Resourcestab.

Click on the plus icon and add the

library file.

Click OK

QTP Training Session4 Control Structures

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