CSC/ECE 517 Fall 2009/wiki2 19 as: Difference between revisions
| Line 11: | Line 11: | ||
===Strengths=== | ===Strengths=== | ||
Test-driven development offers more than just simple validation of correctness, but can also drive the design of a program. By focusing on the test cases first, one must imagine how the functionality will be used by clients (in the first case, the test cases). So, the programmer is only concerned with the interface and not the implementation. This benefit is complementary to [http://en.wikipedia.org/wiki/Design_by_Contract Design by Contract] as it approaches code through test cases rather than through mathematical assertions or preconceptions. | Test-driven development offers more than just simple validation of correctness, but can also drive the design of a program. By focusing on the test cases first, one must imagine how the functionality will be used by clients (in the first case, the test cases). So, the programmer is only concerned with the interface and not the implementation. This benefit is complementary to [http://en.wikipedia.org/wiki/Design_by_Contract Design by Contract] as it approaches code through test cases rather than through mathematical assertions or preconceptions. | ||
The power test-driven development offers is the ability to take small steps when required. It allows a programmer to focus on the task at hand as the first goal is to make the test pass. Exceptional cases and error handling are not considered initially. Tests to create these extraneous circumstances are implemented separately. Another advantage is that test-driven development, when used properly, ensures that all written code is covered by a test. This can give the programming team, and subsequent users, a greater level of trust in the code. | |||
===Weaknesses=== | ===Weaknesses=== | ||
Revision as of 03:13, 9 October 2009
Development methodologies
Responsibility Driven
Test Driven
Overview
Test-driven development (TDD) is a software development technique that relies on the repetition of a very short development cycle: First the developer writes a failing automated test case that defines a desired improvement or new function, then produces code to pass that test and finally refactors the new code to acceptable standards.
The following flowchart shows the typical development cycle of TDD:
Strengths
Test-driven development offers more than just simple validation of correctness, but can also drive the design of a program. By focusing on the test cases first, one must imagine how the functionality will be used by clients (in the first case, the test cases). So, the programmer is only concerned with the interface and not the implementation. This benefit is complementary to Design by Contract as it approaches code through test cases rather than through mathematical assertions or preconceptions.
The power test-driven development offers is the ability to take small steps when required. It allows a programmer to focus on the task at hand as the first goal is to make the test pass. Exceptional cases and error handling are not considered initially. Tests to create these extraneous circumstances are implemented separately. Another advantage is that test-driven development, when used properly, ensures that all written code is covered by a test. This can give the programming team, and subsequent users, a greater level of trust in the code.
Weaknesses
Behavior Driven
Behavior Driven Development (or BDD) is an Agile software development technique that encourages collaboration between developers, QA and non-technical or business participants in a software project.
Domain Driven
Domain-driven design (DDD) is an approach to the design of software, based on the two premises:
Model Driven
Model-driven engineering (MDE) is a software development methodology which focuses on creating models, or abstractions, more close to some particular domain concepts rather than computing (or algorithmic) concepts. It is meant to increase productivity by maximizing compatibility between systems, simplifying the process of design, and promoting communication between individuals and teams working on the system.