Browse Prior Art Database

AUTOMATED REGRESSION TESTING USING A VIRTUAL PRINTER

IP.com Disclosure Number: IPCOM000013021D
Original Publication Date: 2000-Aug-01
Included in the Prior Art Database: 2003-Jun-12
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Abstract

Disclosed is a method for fully automating the traditionally manual process of regression testing printer management software. The following scenarios are addressed, which previously required manual intervention: hardware or physical media failures; simultaneous disablement of multiple printers; and comparison of results to baseline hardcopy. Automation improves tester productivity by reducing test execution time, creating reproducible results, enabling testing during non-working hours, and by making feasible extended duration stress tests.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

AUTOMATED REGRESSION TESTING USING A VIRTUAL PRINTER

   Disclosed is a method for fully automating the traditionally manual process of
regression testing printer management software. The following scenarios are
addressed, which previously required manual intervention: hardware or physical
media failures; simultaneous disablement of multiple printers; and comparison of
results to baseline hardcopy. Automation improves tester productivity by
reducing test execution time, creating reproducible results, enabling testing
during non-working hours, and by making feasible extended duration stress tests.

   A typical embodiment is depicted in Figure 1. Graphic User Interface (GUI)
events generator 100, which can be scripted, drives printer management system
101. Printer management system 101 transforms a variety of formats into Mixed
Object Document Content Architecture (MODCA) [1], which supports sophisticated
manipulations including the use of generic object containers. Printer management
system 101 converts MODCA into Intelligent Printer Data Stream (IPDS) [2], which
provides page level recovery. Printer management system 101 sends IPDS to
"virtual" printer 102. Virtual printer 102 rasterizes data contained in the IPDS
to create a bitmap; a "virtual" printer does not use the bitmap to fuse toner on
paper but sends the bitmap to bitmap comparison tool 103. Bitmap comparison tool
103 uses a reference bitmap to validate the new bitmap. The reference bitmap
likely was generated by an earlier version of the printer management system.
Version control system 104 is used to record and track discrepancies detected by
bitmap comparison tool 103. Virtual printer 102 is one novel element in the
system which allows bitmaps to be conveyed electronically. Absence of physical
media allows the virtual printer to run indefinitely and unattended. Comparisons
to baseline values are entirely objective and done at computational speed versus
visual comparisons to baseline hardcopy. The other novelty is the linking of
existing products for an end-to-end system which results in thoroughly
documented, completely reproducible defects made available immedi...