For Testers Only
^^^^^
**Definition:**

* This smell arises when a production class contains methods only used by test methods. This kind of production classes should be removed, since it does not provide functionalities used by other classes in the system. From the testing side, this smell involves an extra effort needed in order to comprehend and modify as assertions.


**References:**

.. admonition:: Quality attributes

    * :octicon:`file-code;1em` -  Code Example
    * :octicon:`comment-discussion;1em` -  Cause and Effect
    * :octicon:`graph;1em` -  Frequency
    * :octicon:`sync;1em` -  Refactoring

* `A survey on test practitioners' awareness of test smells <https://arxiv.org/abs/2003.05613>`_
* `An empirical analysis of the distribution of unit test smells and their impact on software maintenance <https://ieeexplore.ieee.org/document/6405253>`_ :octicon:`graph;1em`
* `An exploratory study of the relationship between software test smells and fault-proneness <https://ieeexplore.ieee.org/abstract/document/8847402/>`_ :octicon:`comment-discussion;1em` :octicon:`graph;1em`
* `Are test smells really harmful? An empirical study <https://link.springer.com/article/10.1007/s10664-014-9313-0>`_ :octicon:`comment-discussion;1em` :octicon:`graph;1em` :octicon:`sync;1em`
* `Automatic generation of smell-free unit tests <https://repositorio.ul.pt/handle/10451/56819>`_ :octicon:`comment-discussion;1em`
* `Categorising Test Smells <https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.696.5180&rep=rep1&type=pdf>`_ :octicon:`graph;1em`
* `Enhancing developers’ awareness on test suites’ quality with test smell summaries <https://lutpub.lut.fi/handle/10024/158751>`_
* `How are test smells treated in the wild? A tale of two empirical studies <https://sol.sbc.org.br/journals/index.php/jserd/article/download/1802/1807/7485>`_ :octicon:`graph;1em`
* `On the diffusion of test smells in automatically generated test code: an empirical study <https://dl.acm.org/doi/10.1145/2897010.2897016>`_
* `On the interplay between software testing and evolution and its effect on program comprehension <https://link.springer.com/chapter/10.1007/978-3-540-76440-3_8>`_ :octicon:`comment-discussion;1em`
* `Refactoring Test Code <https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.19.5499&rep=rep1&type=pdf>`_ :octicon:`comment-discussion;1em` :octicon:`sync;1em`
* `Scented since the beginning: On the diffuseness of test smells in automatically generated test code <https://www.sciencedirect.com/science/article/pii/S0164121219301487?casa_token=UT0EMFzxTcQAAAAA:L9J82_15tdySkabcIMSHKPx8rVkrltOzcwgme5cIBWgT0txJENY5y-BdUmCYUoGHnoEjZJH-cYc>`_
* `Test Smell Detection Tools: A Systematic Mapping Study <https://dl.acm.org/doi/10.1145/3463274.3463335>`_
* `TestQ: Exploring Structural and Maintenance Characteristics of Unit Test Suites <https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.649.6409&rep=rep1&type=pdf>`_
* `xUnit test patterns: Refactoring test code <https://books.google.com.br/books?hl=pt-BR&lr=&id=-izOiCEIABQC&oi=fnd&pg=PT19&dq=%22test+code%22+AND+(%22test*+smell*%22+OR+antipattern*+OR+%22poor+quality%22)&ots=YL71coYZkx&sig=s3U1TNqypvSAzSilSbex5lnHonk#v=onepage&q=%22test%20code%22%20AND%20(%22test*%20smell*%22%20OR%20antipattern*%20OR%20%22poor%20quality%22)&f=false>`_ :octicon:`comment-discussion;1em` :octicon:`sync;1em`