mad computer science: testing cobol with rspec

Mad Computer ScienceTesting COBOL With RSpec

Guy Royseroyseg@nationwide.com

@guyroyse

About Me

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Guy RoyseDevelopment Competency LeadApplication Development Center

Likes TDD, Pairing, Polyglot Programming, Piña Coladas, Walks in the Rain

Dislikes Coding Alone, Complexity, Being Confused for Hagrid

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COBOLJavaRubyTDD

RSpec

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Test COBOL

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About COBOL

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CompletelyObsoleteBusinessOrientedLanguage

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** No affiliation with GEICO is intended or implied. All rights reserved. Look both ways before crossing the street. Vote early and vote often.

**

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"COBOL has almost no fervent enthusiasts. As a programming tool, it has

roughly the sex appeal of a wrench."

Charles Petzold

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A Simple Application

The Data The Code

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PhoneValidator

AddressValidator

ContactValidatorContact

AddressPhone

Java Data Implementation

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public class Contact { private String name; private Phone home; private Phone cell; private Address address;

public String getName() { return name }; public void setName(String name) { this.name = name; }

/* etc. */}

COBOL Data Implementation

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01 CONTACT. 05 NAME PIC X(30). 05 HOME-PHONE. 10 HOME-AREA-CODE PIC 9(3). 10 HOME-EXCHANGE PIC 9(3). 10 HOME-PHONE-NUMBER PIC 9(4). 05 CELL-PHONE. 10 CELL-AREA-CODE PIC 9(3). 10 CELL-EXCHANGE PIC 9(3). 10 CELL-PHONE-NUMBER PIC 9(4). 05 ADDRESS. 10 STREET PIC X(30). 10 CITY PIC X(20). 10 STATE PIC X(2). 10 ZIP-CODE PIC X(5).

Java Code Implementation

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public class ContactValidator { private PhoneValidator phoneValidator; private AddressValidator addressValidator;

public void validate(Contact contact) { validateName(contact.getName); phoneValidator.validate(contact.getHome()); phoneValidator.validate(contact.getCell()); addressValidator.validate(contact.getAddress()); }

private void validateName(String name) { /* validates name */ }

}

COBOL Code Implementation

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IDENTIFICATION DIVISION. PROGRAM-ID. CONTACT-VALIDATOR.

PROCEDURE DIVISION USING CONTACT.

MAIN. CALL PHONE-VALIDATOR USING HOME-PHONE. CALL PHONE-VALIDATOR USING CELL-PHONE. CALL ADDRESS-VALIDATOR USING ADDRESS. PERFORM VALIDATE-NAME. GOBACK

VALIDATE-NAME.* VALIDATE NAME

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COBOL is Just as Testable as Java

COBOLRuby

Eternity

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contactspec.rb

ETERNITY.CBL

CONTACT.CBL

command.txt

input.txt

output.txt

eternity.rb

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Demo!

Image Credits

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http://www.flickr.com/photos/justin_case/1525042316http://www.flickr.com/photos/cbmd/2475626473

http://www.flickr.com/photos/kc-bike/2398970429http://www.flickr.com/photos/7603557@N08/454618030

http://www.flickr.com/photos/pennuja/5386712834http://www.flickr.com/photos/blackeycove/3997170938