Test-driven development (TDD) is an Agile software development methodology focusing on testing before writing code. Test-driven development aims to ensure that the codebase is error-free and that it adheres to the project's requirements. By writing tests first, developers can quickly identify issues with the code and make necessary changes to ensure that the code works as expected.
The process of test-driven development begins with writing an automated unit test for a specific feature of the code. The test should evaluate the feature for any errors and should fail if the feature does not meet the requirements. Once this test has been written, the developer can write the feature's production code. When the code is written, it can be tested against the unit test to ensure it works as expected.
TDD encourages developers to think about the design of the code before writing it. By writing tests first, developers can consider the design of the code and ensure that it meets the project's requirements. This helps to prevent any potential issues that could arise from having poorly designed code.
Another benefit of test-driven development is that it helps to ensure that the codebase remains stable. By writing tests for each feature, any changes made to the code can be quickly evaluated against the tests to ensure that it does not break any existing code. This helps to ensure that the codebase remains stable and that any changes to the code do not introduce any new errors.
Manual Testing
Automated Testing
Create unit Test(Red)
Create the Code(Green)
Refactor
Write test first
Write enough code to pass the test
Subsequent code updates and testing
Envisioning
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TDD
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ADD
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TDD refers to Test Driven Development.
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AMDD refers to Agile Model Driven Development.
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TDD develops the test cases before the
software is fully developed and makes
necessary updates based on test results.
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AMDD is an Agile version of MDA (Model
Driven Architecture) or Model Driven
Development (MDD), where extensive
models are designed before source code is
written.
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This technique focuses more on the
implementation of a feature.
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This technique focuses more on the
implementation of functionality.
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It shortens the programming feedback
loop.
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It shortens the modelling feedback loop.
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It does not address the agile scaling
issues.
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It addresses the Agile scaling issues.
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It promotes the development of high-
quality code.
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It promotes high-quality communication
with stakeholders and developers.
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It provides detailed specifications.
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It is better for thinking through bigger
issues.
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Participants are programmers.
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Participants are stakeholders, and data
professionals, business analysts.
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It is not visually oriented.
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It is visually oriented.
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TDD has a limited scope than AMDD.
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AMDD has a larger scope than TDD.
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