7. Using Classes | Advanced UFT 12 for Test Engineers Cookbook

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Table Of Contents

Advanced UFT 12 for Test Engineers Cookbook

4 (3)

Advanced UFT 12 for Test Engineers Cookbook

4 (3)

Overview of this book

This advanced cookbook is designed for software testers and engineers with previous automation experience and teaches UFT (QTP) developers advanced programming approaches. Knowledge of software testing and basic coding (with VBScript in particular) and familiarity with programming concepts are prerequisites.

Preface

Preface

What this book covers

What you will need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Data-driven Tests

1. Data-driven Tests

Introduction

Creating a DataTable parameter

Retrieving data from a DataTable

Storing data in a DataTable

Importing an Excel file to a test

Exporting a DataTable

Parameterizing Test Object properties

Defining test cases using a DataTable

Storing data in the Environment object

Retrieving data from the Environment object

Reading values from an INI file

Using a configuration file to manage test environments

Using a global dictionary for fast shared data access

Using a global dictionary for fast shared code access

2. Testing Web Pages

2. Testing Web Pages

Introduction

Checking whether page links are broken

Deleting cookies

Managing multiple browser windows

Handling pop-up dialogs

Downloading a file using XMLHttp

Checking whether a website is up

Uploading a file using FTP

Identifying elements based on anchors

Synchronizing a test with a web page loading

Accessing web elements through DOM

3. Testing XML and Database

3. Testing XML and Database

Introduction

Establishing and closing a database connection

Using SQL queries programmatically

Using a database checkpoint

Using an XML checkpoint

4. Method Overriding

4. Method Overriding

Introduction

Overriding a Test Object method

Registering a method to all classes

Using method overriding to support object subtypes

Adding a new method to a class

5. Object Identification

5. Object Identification

Introduction

Setting mandatory and assistive properties for a class

Using Descriptive Programming inline

Using the Description object

Using child objects

Using native properties for object identification

Identifying an object based on its parent

6. Event and Exception Handling

6. Event and Exception Handling

Introduction

Catching errors inside a function or subroutine

Creating and using a recovery scenario

Using a global dictionary for recovery

7. Using Classes

7. Using Classes

Introduction

Implementing a class

Implementing a simple search class

Implementing a generic Login class

Implementing function pointers

Implementing a generic Iterator

8. Utility and Reserved Objects

8. Utility and Reserved Objects

Introduction

Using global variables (Environment)

Customizing mouse operations (DeviceReplay)

Managing processes (SystemUtil)

Measuring time (MercuryTimers)

Resolving file locations (PathFinder)

Loading shared object repositories (RepositoriesCollection)

Loading and creating XML documents (XMLUtil)

Drawing a rectangle on the screen with Win32 API methods (Extern)

Verifying binary file contents (FileCompare)

Implementing a custom reserved object

Using remote objects

Utility statements

9. Windows Script Host

9. Windows Script Host

Introduction

Reading a key from the Windows® system registry

Writing a key to the Windows® system registry

Deleting a key from the Windows® system registry

Running a process using the Windows® system shell

10. Frameworks

10. Frameworks

Introduction to test automation frameworks

Designing a test automation framework

Building a test controller

Building a reusable component (action)

Building an event handler

Building a test reporter

A. Design Patterns

A. Design Patterns

Auxiliary classes and functions

Action patterns

Runtime data patterns

Index

Index

Implementing function pointers

What is a function pointer? A function pointer is a variable that stores the memory address of a block of code that is programmed to fulfill a specific function. Function pointers are useful to avoid complex switch case structures. Instead, they support direct access in runtime to previously loaded functions or class methods. This enables the construction of callback functions. A callback is, in essence, an executable code that is passed as an argument to a function. This enables more generic coding, by having lower-level modules calling higher-level functions or subroutines.

This recipe will describe how to implement function pointers in VBScript, a scripting language that does not natively support the usage of pointers.

Getting ready

Create a new function library (for instance, cls.FunctionPointers.vbs) and associate it with your test.

How to do it...

Write the following code in the function library:

Class WebEditSet
    Public Default Function Run(ByRef obj, ByVal...

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Programming languages

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