Implementation and Testing

To ensure code performs well, is easy to add to, maintain, debug, and is written in a consistent style across a project.

They avoid developers coding in their own style, provide consistency, improve readability, simplify maintenance, and enable company-wide standardisation.

Keep It Short and Simple.

Don’t Repeat Yourself.

Each significant piece of functionality should be implemented in just one place in the source code.

Software entities should be open for extension but closed for modification.

A code component should perform a single, well-defined task.

Reducing dependencies between code sections and limiting use of shared variables.

Placing code with similar functionality within the same component.

No abbreviations should be used.

Meaningful, intention-revealing names.

All lowercase with words separated by underscores, descriptive but concise.

i, j for nested loops.

Indicators of poor design that make code harder to maintain.

Duplicated code, large classes, long methods, long parameter lists.

Improving software’s internal structure safely without changing behaviour or external interfaces.

More readable and simplified code, easier to change, reduced redundancy, guidance on continuous improvement.

To exercise a program with the intent of finding errors before delivery to the end user.

Reviewing program code to spot logic errors.

A group review by 3–5 IT staff to identify errors, apply quality standards, and verify design requirements.

Testing an individual program or module to find execution and logic errors.

Someone other than the programmer.

Testing two or more programs that depend on each other to ensure proper collaboration.

Verifying all system components work together and handle real processing situations correctly.

That the information system can handle predicted data volumes efficiently.

A guide for testing software, usually prepared before software is built.

Dummy data (sample data).

Software testers.

Test Case, Test Type, Test Steps, Expected Result, Actual Result, Remarks.