dynamic testing throughout the abap development lifecycle

ABAP202

Dynamic Testing Throughout the ABAP Development Lifecycle

Contributing Speaker(s)

NameJonathan Maidstone, SAP AG

NameJürgen Staader, SAP AG

Motivation

Activatable Assertions & Breakpoints

ABAP Unit

GUI Scripting

Summary

Motivation

ABAP Unit

GUI Scripting

Summary

V-Model: Test Type Association

Advantages of Test Automation

Test automation

Saves time

Prevents human error during testing

Provides easily repeatable tests

Test automation during development

Reduces the number of bugs in programs

Provides developers with a regression test

Test automation during implementation or upgrade

Allows controlled repetition of complex scenarios using different sets of data

Test Tool Scope

Motivation

ABAP Unit

GUI Scripting

Summary

Activatable Assertions and Breakpoints is a new technology in ABAP which

introduces the ASSERT statement and

extends the BREAK-POINT statement

It is useful for the development and the maintenance phase.

Activatable Checkpoints

Breakpoints are usually inactive. They can be centrally activated and provide expert knowledge where debugging should start for support and maintenance.

Assertions are used to guarantee the consistent state of the program control flow. They are typically active in development systems. They can be deactivated in production systems which runstably to avoid unnecessary check operations.

Distinctive test type characteristics

TraditionalTest Tools

Test creation effort needed

Performed in dedicated testexecution

Providing all kinds of situations –sound and strange situations

ActivatableAssertions & Breakpoints

No noteworthy effort to set them

Performed in ordinary production execution

Protection against unhealthysituations

Motivation for Activatable Breakpoints

Developers make explicit where breakpoints help to analyze their coding

Better than an informal comment use thespecial statement, a breakpoint that can be activated

some_code.* suggestion: start debugging here to inspect…more_code.

some_code.BREAK-POINT ID inspect_XYZ.more_code.

Motivation for Assertions

To write correct and maintainable programs…… make your assumptions and intentions explicit

Better than an informal comment use thespecial statement, the assertion

some_code.* the following condition should hold: v < 300000more_code.

some_code.ASSERT v < 300000. " nothing is faster than lightmore_code.

Benefits During Development and Tests

program flow

consistent state

program flow

consistent state

unexpected behavior

program flow

consistent state

: assertion

runtime error

find error cause in shorter time

Assertion and Breakpoint Syntax

The checkpoint group group is a workbench object which is maintained using the transaction SAAB

ASSERT ID groupCONDITION cond

BREAK-POINTID group

with activation

ASSERT condBREAK-POINTalways active

conditional(Assertions)

unconditional(Breakpoints)Checkpoints

Activatable Assertions & Breakpoints Summary

Developers persist their expert knowledge about ideal debugging entries by inserting activatable breakpoints.

Developers cement their assumptions and intentions in the code by inserting assertions.

Assertions support developers in writing correct code. Possible errors are found early and are easily located.

Code instrumented with checkpoints is easier to support and maintain.

ABAP assertions can be activated on the fly and without program recompilation. They can be restricted to users or servers in order to take full advantage within production customer systems.

Motivation

ABAP Unit

GUI Scripting

Summary

Test Single Units Before Assembling the Whole

Definitions

What is a Unit?

A unit is a non-trivial, accessible code portion where a given input or action causes a verifiable effect.

What is a Unit Test?

A unit test is the test which tests such a unit individually apart from all other units.

What is ABAP Unit?

ABAP Unit is the new test tool which allows developers writing and executing unit tests in ABAP.

Why are unit tests important?

Unit tests are development tests par excellence.

Testing begins early have confidence in your coding at any time

testing over longer period will increase program quality

reduce risk of bad surprises in the final testing phase

Bugs are found early correction is comparably cheap

project members work on better code base and become more productive

Bugs are found on small units easy error locating

Tests give additional information about the program

No extensive initial training neededtesting in familiar language and environment

The Tricky Relationship Between Developers and Testing

Testing is Boring

I Don’t Have Time to Test

I Test Already

Yes, but you like writing programs! ABAP Unit testing means writing programs in ABAP

that will do automatic testing for you!

That’s because you’re always fixing bugs. Write more tests, find more bugs more quickly!

OK, but your private test objects don’t conform to any standards,cannot be integrated into common QA processes,

do not provide automatic or regression testing.

ABAP Unit Load Concepts

Traditionally:

Code and test code separated

Test Code

Load Test Load

Compilation

Load and execute

Compilation

Load and execute

Test Code

ABAP Unit:

Code and test code in ONE program

LoadTest Load

Load and execute

Prod.Env.

ABAP Unit Test Organization

Example – ABAP Unit Test Class Definition

class wallet_test definition for testing.

private section.

methods:

test for testing.

endclass.

Example – Test Class Definition

class wallet_test definition for testing.

private section.

methods:

test for testing.

endclass.

Identify class as test class

Identify method as test method

Example – Test Class Implementation

class wallet_test implementation.

method test.

create object wallet.

wallet->put_in( dollar = '12.50' ).

cl_aunit_assert=>assert_equals(

act = wallet->liquidity

exp = '12.50'

msg = ‚where‘s the difference?' ).

endmethod.

endclass.

Test code

Verify Test Assertion

ABAP Unit Summary

Standard Unit Test Value

Ensure the intended behaviour of the basic parts before building the whole

A substantial element of software quality assurance:Significantly improves the software development process

Significantly improves the software maintenance process

ABAP Unit Test Enhancements

Close integration into language

Keep code and tests synchronized

Equal weight on individual testing and on mass testing

Motivation

ABAP Unit

GUI Scripting

Summary

SAP GUI Scripting

SAP GUI Scripting…...is an interface exposed by SAP GUI.

…can make life easier for users by automating repeating tasks.

…is a basis for tools that test the SAP system.

…allows client side applications to collaborate.

Availability:Shipped with SAP GUI 6.20 and future versions

Compatible with:All R/3 versions currently supported by SAP

Applications built on top of Web AS 6.10 to 6.40

Non-Dynpro based applications (BSP, Web Dynpro, …) are not supported. See note 587202 for known limitations.

Built-in Scripting Utilities in SAP GUI

SAP GUI Scripting Object Model

Platform and Programming Language Independence

Common Object Model for SAP GUI for Windows andSAP GUI for Java

The same types of objects are exposed

Same set of properties and methods

The runtime hierarchy is identical

Some differences in accessing the root object and the lifetime of event handlers

Result: Identical JavaScript scripts may be executedusing either SAP GUI for Java or SAP GUI for Windows

Testing Applications Using SAP GUI Scripting

Advantages

Quick record and replay to check that an application still works

No previous knowledge required for creating simple scripts

Private test objects stored locally on your workstation

Disadvantages

Requires VBS or Java Script knowledge to edit the script

No built-in mechanisms for handling pass/fail criteria

No higher-level management tools

Building on SAP GUI Scripting. . .

SAP GUI Scripting is used by various partner products, such as

Mercury Interactive

QuickTest Professional

LoadRunner

Compuware

TestPartner

QALoad

It is also used by SAP as one of the underlying technologies of the Extended Computer Aided Test Tool (eCATT)

Motivation

ABAP Unit

GUI Scripting

Summary

ABAP Unit and eCATT: Key Differences

ABAP Unit

Accompanies development

White-box testing

Tests written

By the developer

In the ABAP Workbench

In ABAP

Tests attached to and transported with the object under test

Test execution always local

Post-development or in upgrade

Gray-box testing

Tests written:

By a test automation expert

In the eCATT environment

Using eCATT script language

Tests not attached to the object under test, and are generally stored centrally

Test execution generally remote

Test Coverage with SAP eCATT

SAP Database

Read or check database tables

Check or activate Customizing settings in BC Sets

Application Server

Call function modules

Instantiate and test classes

Write ad-hoc ABAP routines in test scripts

Record and replay transactions running in SAPGUI for Windows and SAPGUI for Java

Record and replay Web Dynpro applications

Integrate certified external tools for testing otherdesktop or browser-based applications

Example: Possible Scope of an eCATT Test

Check that Customizing settings are correct

Run a transaction

Check the contents of an output field on the screen

Ensure that a particular message was sent

Pass a value from the last transaction to a different script that calls the next transaction in the business process

Structure of an eCATT Script

Recordan

Application

Field Checks

Customizing Checks

ase Ch

Parameters

Define whatgoes in

Parameters

Define whatcomes out

Scripts: Building Blocks for Complex Tests

Script

Pool of test modules

Script Script Script

“High-level” scriptTests a business process by calling other scripts

Complicating the Issue – Multiple Test Systems

Test case must be ableto cross system boundarieseasily and must be portableto other system landscapes

eCATT System Landscape

Existing System Landscape

R/34.6C

CRM3.0

BW2.2 APO

Web AS 6.40(or higher)

eCATT Remote testing

SolutionManager(ProjectAdmin)

System Data Container – Your Test Landscape

eCATT Script Editor – Key Features At-A-Glance

Pattern insertion

Automatic parameter creation

Global search

Where-used list

Debugger

Start options controlling execution behavior

One Step Further … Data-Driven Tests

A test case must be able to be run repeatedly with different sets of data

But…

You cannot store multiple sets of data within a test script

So. . .

In order to create a data-driven test, you use a different test object called a test configuration

Test Configuration

Building a Data-Driven Test

Test Script

Commands

Logical Systems(unresolved)

Importing parameters(what data is required?)

+System Data Container

Resolves logical system namesinto real RFC destinations

+Variants

Each variant contains a valuefor each importing parameter

of the script

Where Do Variants Come From?

Design Time

Entered manually in configuration editor

Uploaded from an external file

Reference to an external file

References from one or more test data container

Runtime

Entered manually in start options

Subset of existing internal variants

Reference to different external file

The variant selection that you define at designtime can be re-defined at runtime

Uses for Test Configurations

Assign a test configurationto a project step in the Solution Manager or to a Test Catalog in the Test Organizer

Generate a Test Plan to assign individual tests to particular users

Motivation

ABAP Unit

GUI Scripting

Summary

The SAP Development Environment supports testing in all phases of the development and deployment process

Use assertions and breakpoints for targeted error-detection

ABAP Unit provides a standardized ABAP-based test framework for developers to write unit tests

GUI Scripting allows you to record and replay sequences of actions in the SAP GUI

Functional testing of end-to-end business processes is possible using eCATT

Further Information

Public Web:www.sap.com

SAP Developer Network: www.sdn.sap.com

Search for ABAP Knowledge Center

SAP Customer Services Network: www.sap.com/services/

Related Workshops/Lectures at SAP TechEd 2004ABAP152, Automating Functional Tests with eCATT, Hands-onABAP201, Best of ABAP - The Ultimate ABAP 6.40 Feature Show, LectureABAP253, ABAP Troubleshooting, Hands-onABAP254, New Dynamic Test Tools for ABAP Developers, Hands-onJAVA351, Using eCATT to Test Web Dynpro Applications, Hands-on

Related SAP Education Training Opportunitieshttp://www.sap.com/education/

SAP Developer Network

Look for SAP TechEd ’04 presentations and videos on the SAP Developer Network.

Coming in December.

http://www.sdn.sap.com/

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dynamic testing throughout the abap development lifecycle

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