Ohne Titel

ISYS6264 Testing and System Implementation

• 
• •Defect Management
• •Benefit of Defect Analysis
• •Bugs and Root Causes
• •Levels of Importance to Bug
• •Bug Life Cycle
• •Bug Report
• •Steps for Better Bug Reports
• •Managing Bug Tracking

Before we start...

• 1. Make sure you already have the pdf version of our reference book,
• Rex Black. (2009). Managing The Testing Process. 03. Wiley Publishing Inc. Indianapolis. ISBN: 978-0-470-40415-7.
• 2. The solutions for last week exercise will be discussed later.
• 3. Make sure you are still preparing for upcoming mid-exam! If you still do not understand the materials yet, allocate some time to come to tutorial sessions.

Bug Management

• Using Streak for Bug Tracking (Einbetten)
• Bildunterschrift: Source: https://www.youtube.com/watch?v=1XpobUYYPUY

What do you know about bug or defect?

• 
• Bildunterschrift: Source: http://pediaa.com/difference-between-bug-and-defect/

In general, defect or bug refers to some problem present in the system under test that would cause to fail to meet customers' or users' reasonable expectations of quality.

• How to classify defects?
• The impact on users (often called criticality), the necessary effort to correct the defect, the component where this defect is initially present, etc.
• Why defect classification is important?
• To avoid repeated reporting of already discovered defects.

We, therefore, need a bug report!

• 
• Bildunterschrift: Source: Rex Black. (2009). Managing The Testing Process. 03. Wiley Publishing Inc. Indianapolis. ISBN: 978-0-470-40415-7.

Bug Report

• What is a bug report?
• A bug report is a technical document that describes the various symptoms or failure modes associated with a single bug.
• What makes a good bug report?
• Ability to provide the project management team with the information they need to decide when and whether to fix a problem and capture the information a programmer will need to fix and debug the problem.

So, what seems to be the problems?

• The failure description.
• Failure description is the message of the bug report, used to communicate clearly with the programmers and the project team about a problem.
• Done properly,
• Failure description captures in simple prose the essentials of bug.
• Done poorly,
• Failure description obfuscates the bug and misleads the readers.

What a good failure description looks like?

Summary, Steps to reproduce, and Isolation

• The summary is a one- or two-sentence description of the bug, emphasizing its impact on the customer or the system user. The summary tells managers, developers, and other readers why they should care about the problem.
• The sentence, ‘‘I had trouble with screen resolutions’’ is a lousy summary; the sentence, ‘‘Setting screen resolution to 800 by 1024 renders the screen unreadable’’ is much better. A succinct, hard-hitting summary hooks the reader and puts a label on the report. Consider it your one chance to make a first impression.
• •

Summary, Steps to reproduce, and Isolation

• 
• The steps to reproduce provides a precise description of how to repeat the failure.
• For most bugs, write down a sequence of steps that re-create the problem. Be concise yet complete, unambiguous, and accurate. This information is critical for developers, who use the report as a guide to duplicate the problem as a first step to debugging it.
• Isolation refers to the results and information the tester gathered to confirm that the bug is a real problem and to identify those factors that affect the bug’s manifestation.
• Bildunterschrift: Source: Rex Black. (2009). Managing The Testing Process. 03. Wiley Publishing Inc. Indianapolis. ISBN: 978-0-470-40415-7.

A ten-step process to be considered to prevent problems caused by bad bug reports

Folie 13

Folie 14

In-Class Exercise 1. Making a bug report

• Write a good bug report