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ISWIM For Testing – A Model Driven Approach Tony Clark Xactium [email_address] www.xactium.com
Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Modelling with Constraints
Telecomms
Network Models Check configurations based on properties of devices and network components.
Aerospace Message Bus Integrated Modular Avionics (IMA)
IMA Models Check configurations of IMA components that must satisfy requirements of navigation modes.
Payload Configurations
Business Processes
Restructuring A Company Check sequences of company snapshots – do they satisfy the business goals? Restructure Company Produce Plans Implement  Plans Produce BizRep Develop Plans Produce Restructuring Plan Produce  Operating Plan Ditch Unprofitable Customers Reorganize products
Web Services and SOA
Information Systems
ISWIM Constraint Representation
Constraints ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Snapshots ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Snapshots as Constraints not c.business_report.terminal and c.restructuring_plan.addresses = c.business_report
Sharing via Identifiers (separation of concerns)
Negation …  but not ...
Unknowns Tied Together …  same as …
Links Over Collections
Universal Quantification
Existential Quantification
Snapshot Checking Machine
Syntax Model
An Execution Machine
Machine Transitions
Auxiliary Machine Defs
An Implementation – ISWIM for Model Driven Testing
Testing Architecture Program Testing  Engine Interface (XML)   Program Display Test  Reports (HTML)   Display Test Cases (HTML)   Model (XMF-Mosaic)   ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],C B A D E F G H I Test Cases (XML) Test Reports (XML)
A sales system keeps info on customers, their accounts and their orders. Customer ids (CID) are unique, but customer information may be distributed.
Model Browser A model is constructed that shows the structure and behaviour of the application. The model could be extracted from an implementation or could be constructed by hand or could be constructed from another modelling tool. The example shows the classes extracted from a Java application.
Test Specification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Static Scenarios A static scenario defines a collection of objects that conforms to the model. The tool will support the construction of the scenarios by completing slots and links where possible. Types of values can be checked by the tool. The scenario represents an implementation independent definition of application data.  It might represent a correct, or an illegal, configuration. The scenario can be exported in XML and recreated as implementation data. SomeContacts
Example Invariant For any sales system, With a contacts database, For each known person p, It is not the case, That the customer id value is EMPTY. NoEmptyCID
Another Invariant For any sales system, With a contacts database, For each known person p1, With an id x, It is not the case that, There is a known person p2, With the id x, Where p1 and p2 are different people. AllCIDsUnique
addContact(String id,String info) Pre-condition Post-condition
placeOrder(String id,int items) post-condition
Export as XML
Modify Source (or use class loader) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
A Test Harness ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Test Results
Conclusion ,[object Object],[object Object],[object Object],[object Object]

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Iswim for testing