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21 lines
895 B
Markdown
Executable File
21 lines
895 B
Markdown
Executable File
# Final classes
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The `final` keyword was removed in version 1.4.0. It was replaced by `@final` annotation.
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This was done due popular demand, not because it is a good technical reason to
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extend the classes.
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This document will show the correct way to work with PSR-7 classes. The "correct way"
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refers to best practices and good software design. I strongly believe that one should
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be aware of how a problem *should* be solved, however, it is not needed to always
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implement that solution.
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## Extending classes
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You should never extend the classes, you should rather use composition or implement
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the interface yourself. Please refer to the [decorator pattern](https://refactoring.guru/design-patterns/decorator).
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## Mocking classes
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The PSR-7 classes are all value objects and they can be used without mocking. If
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one really needs to create a special scenario, one can mock the interface instead.
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