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See Also
Best Practices for Software Projects - Risk Management.
More...
Beyond Broken Links. More...
Minimizing Software Defects via Inspections.
More...
Testing GUI. More...
Test Methods. More...
Test Reviews. More...
Weekly Status Report
Sample. More...
Stocking and Managing a Test Lab.
More...
Key QA Documents. More...
Improving the Quality process by
doing the
Metrics Calculation
Download
Documentation Tips. More...
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More Resources
Some templates that
you will find useful
during the development
of your software product.
More...
When is a test plan
to complicated
by Charles Shelby. More...
Test Development
Life Cycle. More...
Test Plan Outline. More...
The test specification should
explain "how" to implement
the test cases described in the test plan. More...
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Negative test cases are designed to test the software in ways it was not intended to be used, and should be
a part of your testing effort. Below are the top 10 negative test cases you should consider when designing your
test effort.
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| Top 10 Negative Test Cases |
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1. Embedded Single Quote - Most SQL based database systems have issues when users
store information that contain a single quote (e.g. John's car). For each screen that accepts alphanumeric data
entry, try entering text that contains one or more single quotes.
2. Required Data Entry - Your functional specification should clearly indicate
fields that require data entry on screens. Test each field on the screen that has been indicated as being required
to ensure it forces you to enter data in the field.
3. Field Type Test - Your functional specification should clearly indicate
fields that require specific data entry requirements (date fields, numeric fields, phone numbers, zip codes, etc).
Test each field on the screen that has been indicated as having special types to ensure it forces you to enter
data in the correct format based on the field type (numeric fields should not allow alphabetic or special characters,
date fields should require a valid date, etc)
4. Field Size Test - Your functional specification should clearly indicate
the number of characters you can enter into a field (for example, the first name must be 50 or less characters).
Write test cases to ensure that you can only enter the specified number of characters. Preventing the user from
entering more characters than is allowed is more elegant than giving an error message after they have already entered
too many characters.
5. Numeric Bounds Test - For numeric fields, it is important to test for lower and
upper bounds. For example, if you are calculating interest charged to an account, you would never have a negative
interest amount applied to an account that earns interest, therefore, you should try testing it with a negative
number. Likewise, if your functional specification requires that a field be in a specific range (e.g. from 10
to 50), you should try entering 9 or 51, it should fail with a graceful message.
6. Numeric Limits Test - Most database systems and programming languages allow numeric
items to be identified as integers or long integers. Normally, an integer has a range of -32,767 to 32,767 and
long integers can range from -2,147,483,648 to 2,147,483,647. For numeric data entry that do not have specified
bounds limits, work with these limits to ensure that it does not get an numeric overflow error.
7. Date Bounds Test - For date fields, it is important to test for lower and
upper bounds. For example, if you are checking a birth date field, it is probably a good bet that the person's
birth date is no older than 150 years ago. Likewise, their birth date should not be a date in the future.
8. Date Validity - For date fields, it is important to ensure that invalid
dates are not allowed (04/31/2007 is an invalid date). Your test cases should also check for leap years (every
4th and 400th year is a leap year).
9. Web Session Testing - Many web applications rely on the browser session to keep
track of the person logged in, settings for the application, etc. Most screens in a web application are not designed
to be launched without first logging in. Create test cases to launch web pages within the application without
first logging in. The web application should ensure it has a valid logged in session before rendering pages within
the application.
10. Performance Changes - As you release new versions of your product, you should
have a set of performance tests that you run that identify the speed of your screens (screens that list information,
screens that add/update/delete data, etc). Your test suite should include test cases that compare the prior release
performance statistics to the current release. This can aid in identifying potential performance problems that
will be manifested with code changes to the current release.
A solid tool for this is Software
Planner. More...
Implementing measurements can improve your software quality and prepare your team for delivering on-time and on-budget.
Below are some helpful templates to aid you in developing software solutions on-time and on-budget:
Release Package. More...
Test Cases Sample. More...
Test Matrices Sample. More...
Test Plan Sample. More...
Test Case Design. More...
Weekly Status Report Sample. More...
Stocking and Managing a Test Lab.
More...
Key QA Documents. More...
 Share your thoughts on Best Practices for Software Projects
- Estimating in SQAtester Group.
 E-mail to a Friend.
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Using Online Tools
The project software life cycle can be greatly improved
by managing all phases of the software life cycle online. A web-based tool can sometimes be easiest to use, as
it requires no client configuration. There are many solutions to choose from, consider Defect Tracker or Software Planner, depending on your needs. What ever tool you select should
have the ability to collect metrics (like number of defects over time, etc.) without much extra effort on your
part. Both of the products mentioned have this capability. More...
The tool you select should also allow you to create your own custom lists of information. This is especially important
as to allow you to create your own screens to track measurements for each area of the system you wish to track
measurements for. Defect Tracker and Software Planner both have a List Manager feature that allows you to create
custom screens to track anything you like. You can use that to track your measurements. More...
Try Software Planner FREE for 2 weeks.
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| Books to Read |
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Quality Web Systems
This book provides a framework for ensuring that key Web system success criteria are addressed during the development
of a Web system. Detailed technical guidance is provided for all criteria, along with testing strategies that allow
for verification of a quality implementation. More...
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Automated Software Testing
Written for those with some background in software engineering, Automated Software Testing: Introduction, Management,
and Performance delivers a rigorous guide to the state of the art in managing automated testing in a text that
will benefit anyone who tests software for a living. More...
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