Hong, KangWoon (TTA team) Master of Software Engineering, ICU&CMU 1 Requirements Analysis for TTA studio project Hong, KangWoon SEP 13, 2005

11Hong, KangWoon (TTA team)Hong, KangWoon (TTA team) Master of Software Engineering, ICU&CMUMaster of Software Engineering, ICU&CMU

Requirements Analysis Requirements Analysis for TTA studio project for TTA studio project

Hong, KangWoon SEP 13, 2Hong, KangWoon SEP 13, 2005005


Initial Project OverviewInitial Project Overview

TTCN Translator System

Protocol Test Cases in TTCN

Lexical Analysis

Syntax Analysis

Semantic Analysis

Code Generation

Protocol Test


Context DiagramContext Diagram

TTCN Translator

System

TTCN Script Writer

Maintenance Representative

Symbol Management

System

Translate TTCN Script

Perform Update

Forward Parse Tree

Store Parse TreeRequest Parse Tree

Protocol Tester

CompileCode


ActorsActors

• TTCN Script WriterTTCN Script Writer– an individual who requests translation for an individual who requests translation for

TTCN script fileTTCN script file

• Maintenance RepresentativeMaintenance Representative– an individual who maintains subsystems of an individual who maintains subsystems of

TTCN translator systemTTCN translator system

• Symbol Management SystemSymbol Management System– a system that manages information a system that manages information

needed to make parse tree and target codeneeded to make parse tree and target code

• Protocol TesterProtocol Tester– an individual who compiles with generated an individual who compiles with generated

codecode


Use CasesUse Cases

• Translate TTCN ScriptTranslate TTCN Script– Analyses for lexis, syntax, semanticAnalyses for lexis, syntax, semantic– Code generationCode generation– For analysis error,For analysis error,

•Performs behaviors of the extending Performs behaviors of the extending use case, Remove TTCN Script (Refer use case, Remove TTCN Script (Refer alternative scenario)alternative scenario)

• Perform UpdatePerform Update– Maintenance for each subsystemMaintenance for each subsystem


Use Case Diagram (1/2)Use Case Diagram (1/2)TTCN Translator System boundaryTTCN Translator System boundary

Analyze Lexis

Analyze Syntax

Analyze Semantic

Symbol Manageme...

Translate TTCN Script

TTCN Script Writer

Perform Update

<<extend>>

<<extend>>

<<extend>>

Remove TTCN script

<<extend>>

Perform Syntax Analyzer Update

Perform Lexical Analyzer Update

Perform Code Generator Update

Maintenance Representative Perform Semantic Analyzer

Update

Generate Code

<<extend>> Protocol Tester


Use Case Diagram (2/2)Use Case Diagram (2/2)

• Translate TTCN ScriptTranslate TTCN Script– EXTENDed by the followed use casesEXTENDed by the followed use cases

• Analyze LexisAnalyze Lexis• Analyze SyntaxAnalyze Syntax• Analyze SemanticAnalyze Semantic• Generate CodeGenerate Code• Remove TTCN ScriptRemove TTCN Script

• Perform UpdatePerform Update– GENERALIZEs the followed use casesGENERALIZEs the followed use cases

• Perform Lexical Analyzer UpdatePerform Lexical Analyzer Update• Perform Syntax Analyzer UpdatePerform Syntax Analyzer Update• Perform Semantic Analyzer UpdatePerform Semantic Analyzer Update• Perform Code Generator UpdatePerform Code Generator Update


Domain ObjectsDomain Objects

• TTCN Script WriterTTCN Script Writer– User who writes TTCN script fileUser who writes TTCN script file– User who executes TTCN translatorUser who executes TTCN translator

• TTCN Script FileTTCN Script File– Collection of test cases written in TTCNCollection of test cases written in TTCN

• Target CodeTarget Code– Collection of codes translated from TTCNCollection of codes translated from TTCN

• Maintenance RepresentativeMaintenance Representative– Supporter who writes and maintains TTCN Supporter who writes and maintains TTCN

translatortranslator• Protocol TesterProtocol Tester

– Tester who tests protocol using target Tester who tests protocol using target codecode


High Priority Use Case High Priority Use Case (1/4)(1/4)

• ““Translate TTCN Script” use caseTranslate TTCN Script” use case– PreconditionsPreconditions

• TTCN script written in TTCN with/without errorTTCN script written in TTCN with/without error• System can have features of a legacy compiler and System can have features of a legacy compiler and

generate target codegenerate target code

– PostconditionsPostconditions• Translation process is completed without errorTranslation process is completed without error



– Successful Flow of EventsSuccessful Flow of EventsTTCN script writer request TTCN translation

In Analysis phase

Parses tokens

Stores analysis result and tokens

Checks syntax error and makes parse tree

Stores analysis result and parse tree

Checks semantic error

Stores analysis result

System generates target code

System removes information relevant to TTCN script file



• Alternative ScenarioAlternative Scenario– Insertion pointInsertion point

• ““System checks syntax error”System checks syntax error”

– PreconditionsPreconditions• System found syntax error(s) during analysisSystem found syntax error(s) during analysis

– PostconditionsPostconditions• System removes a request for TTCN translationSystem removes a request for TTCN translation



– Alternative Flow of EventsAlternative Flow of EventsStores analysis result with error information

I nforms TTCN script writer the reason by showing error messages on the screen

Removes a TTCN script file and information relevant to the file


What furtherWhat further

• How many concurrent works are How many concurrent works are possible?possible?– Concurrency LevelConcurrency Level

• How can the system reflect user’s How can the system reflect user’s need for readability?need for readability?– Readability LevelReadability Level

• Error type, Error Handling routine, …Error type, Error Handling routine, …– Error HandlingError Handling


Q&Q&AA


Backup SlidesBackup Slides


TTCNTTCN

• The Needs for TTCNThe Needs for TTCN– Conformance, InteroperabilityConformance, Interoperability

• an increasing amount of standardsan increasing amount of standards

– Automatic testingAutomatic testing• Test is time consuming and error-prone Test is time consuming and error-prone

tasktask

• Standardization (ISO 9646-3)Standardization (ISO 9646-3)– Tree and Tabular Combined NotationTree and Tabular Combined Notation– Incorporated specificationIncorporated specification

• a framework for conformance testinga framework for conformance testing

– Test casesTest cases


ReferenceReference

• TTCN tutorial (TTCN tutorial (http://www.iec.orghttp://www.iec.org))• Software Requirement Specification for TesSoftware Requirement Specification for Tes

tGen V0.8tGen V0.8

Documents

Hong, KangWoon (TTA team) Master of Software Engineering, ICU&CMU 1 Requirements Analysis for TTA studio project Hong, KangWoon SEP 13, 2005