VBSCRIPT – THE BASICS............................................................................................................ 2
WHAT IS A VARIABLE?........................................................................................................... 3
VARIABLES NAMING RESTRICTIONS ..................................................................................... 3
HOW DO I CREATE A VARIABLE?.......................................................................................... 3
DECLARATION STATEMENTS AND HIGHILIGTS ..................................................................... 3
Dim Statement .................................................................................................................... 3
Overriding Standard Variable Naming Conventions.......................................................... 4
Declaring Variables Explicit and Implicit .......................................................................... 4
Option Explicit Statement................................................................................................... 5
WORKING WITH ARRAYS ........................................................................................................... 5
SCALAR VARIABLES AND ARRAY VARIABLES...................................................................... 6
CREATING ARRAYS................................................................................................................ 6
Fixed Length Arrays ........................................................................................................... 6
Dynamic Arrays.................................................................................................................. 6
Resizing a dynamic array without Preserve........................................................................ 7
Resizing a dynamic array with Preserve............................................................................. 7
Array Iterations................................................................................................................... 8
VBSCRIPT CONSTANTS............................................................................................................... 8
WORKING WITH CONSTANTS ................................................................................................. 8
DECLARING CONSTANTS........................................................................................................ 9
VBSCRIPT PRE-DEFINED CONSTANTS .................................................................................. 10
THE SCOPE AND LIFETIME OF A VARIABLE............................................................................ 11
PRIVATE STATEMENT .......................................................................................................... 11
PUBLIC STATEMENT ............................................................................................................ 12
VBSCRIPT OPERATORS ............................................................................................................ 14
WORKING WITH OPERATORS ............................................................................................... 14
ARITHMETIC OPERATORS .................................................................................................... 15
Addition (+) ...................................................................................................................... 15
Subtraction (-) ................................................................................................................... 15
Multiplication (*).............................................................................................................. 15
Division (/) and Integer Division (\) ................................................................................. 16
Exponentiation (^) ............................................................................................................ 16
Modulus Arithmetic (Mod)............................................................................................... 16
Unary Negation (-)............................................................................................................ 16
String Concatenation (&)(+)............................................................................................. 16
COMPARISON OPERATORS................................................................................................... 16
Equality (=)....................................................................................................................... 17
Inequality (<>) .................................................................................................................. 17
Less Than (<) and Greater Than (>) ................................................................................. 17
Less than or equal (<=), greater than or equal to (>=)...................................................... 17
Object Equivalence (Is) .................................................................................................... 17
LOGICAL OPERATORS .......................................................................................................... 17
Logical Negation (Not)..................................................................................................... 18
Logical Conjunction (And)............................................................................................... 18
Logical Disjunction (Or)................................................................................................... 19
Logical Exclusion (Xor) ................................................................................................... 19
Logical Equivalence (Eqv) ............................................................................................... 20
Logical Implication (Imp)................................................................................................. 20
FLOW CONTROL........................................................................................................................ 21
CONTROLLING THE FLOW OF VBSCRIPT CODE................................................................... 21
Chapter 03 Scripting Quicktest Professional Page 2
Dani Vainstein
daniva1968@hotmail.com
VBScript Basics Page 2 of 52
WHY CONTROL THE FLOW OF CODE? ................................................................................. 21
USING CONTROL STRUCTURES TO MAKE DECISIONS ......................................................... 22
Making Decisions Using If...Then...Else.......................................................................... 22
DECIDING BETWEEN SEVERAL ALTERNATIVES .................................................................. 24
Select Case........................................................................................................................ 26
USING CONTROL STRUCTURES TO MAKE CODE REPEAT.................................................... 28
Using For...Next Statement .............................................................................................. 28
Using For Each...Next Statement...................................................................................... 31
Using Do…Loops Statement ............................................................................................ 32
Using While. . .Wend Statement....................................................................................... 34
PUTTING ALL TOGETHER...................................................................................................... 35
SUBROUTINES AND FUNCTION PROCEDURES.......................................................................... 36
WHAT ARE FUNCTIONS? ..................................................................................................... 36
SUB PROCEDURES................................................................................................................ 36
FUNCTION PROCEDURES...................................................................................................... 37
DECLARING SUBROUTINES/FUNCTIONS .............................................................................. 37
CALLING A SUBROUTINE ..................................................................................................... 38
CALL STATEMENT ............................................................................................................... 39
CALLING A FUNCTION ......................................................................................................... 40
EXITING A SUBROUTINE/FUNCTION .................................................................................... 41
PASSING ARGUMENTS INTO PROCEDURES .......................................................................... 41
WHY ARE PROCEDURES USEFUL?....................................................................................... 42
Exit Statement................................................................................................................... 44
CODING CONVENTIONS ............................................................................................................ 45
CONSTANT NAMING CONVENTIONS.................................................................................... 45
VARIABLE NAMING CONVENTIONS..................................................................................... 46
DESCRIPTIVE VARIABLE AND PROCEDURE NAMES............................................................. 46
OBJECT NAMING CONVENTIONS ......................................................................................... 46
CODE COMMENTING CONVENTIONS ................................................................................... 47
FUNCTIONS AND SUB STANDARDS ...................................................................................... 47
Procedure Header.............................................................................................................. 47
THE QUICKTEST EDITOR OPTIONS ...................................................................................... 49
Fonts and Colors ............................................................................................................... 49
General.............................................................................................................................. 50
CODE INDENTATION ............................................................................................................ 50
QUICKTEST REUSABLE ACTION HEADER............................................................................ 51
CREATING AN ACTION TEMPLATE....................................................................................... 51