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% Document Info
\author{hvid2301}
\pdfinfo{
  /Title (pytest-usage.pdf)
  /Creator (Cheatography)
  /Author (hvid2301)
  /Subject (pytest usage Cheat Sheet)
}

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\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{pytest usage Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{hvid2301} via \textcolor{DarkBackground}{\uline{cheatography.com/186766/cs/39050/}}}
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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}hvid2301 \\
  \uline{cheatography.com/hvid2301} \\
  \end{tabulary}
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 1st June, 2023.\\
   Updated 1st June, 2023.\\
   Page {\thepage} of \pageref{LastPage}.
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  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
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\end{multicols}}




\begin{document}
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% www.emerson.emory.edu/services/latex/latex_169.html
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\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Installation}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{pip install pytest} \tn 
% Row Count 1 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.24 cm} x{3.76 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Running pytest}}  \tn
% Row 0
\SetRowColor{LightBackground}
pytest test\_mod.py & Run tests in module \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
pytest testing/ & Run multiple modules \tn 
% Row Count 4 (+ 2)
% Row 2
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pytest \seqsplit{test\_mod.py::test\_func} & Run a specific test within a module. \tn 
% Row Count 6 (+ 2)
% Row 3
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pytest \seqsplit{test\_mod.py::TestClass::test\_method} & Run a specific method of a class. \tn 
% Row Count 9 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
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\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Assertions}}  \tn
% Row 0
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\mymulticolumn{2}{x{8.4cm}}{pytest allows you to use the standard Python assert for verifying expectations and values in Python tests. For example, you can write the following:} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
`assert a \% 2 == 0` & assert that you have a certain value. \tn 
% Row Count 5 (+ 2)
% Row 2
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`assert a \% 2 == 0,\{\{nl\}\}"value was odd, should be even"` & specify a message with the assertion like this \tn 
% Row Count 8 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

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\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Grouping in tests}}  \tn
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\{\{literal\}\}@pytest.mark.\textless{}markername\textgreater{} & mark it in tests \tn 
% Row Count 2 (+ 2)
% Row 1
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pytest tests/ -m "sanitytests" & run using -m flag \tn 
% Row Count 4 (+ 2)
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\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Disable tests}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{`@pytest.mark.skip(\{\{nl\}\}    reason="no way of currently testing this")`} \tn 
% Row Count 2 (+ 2)
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\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Assertion of expected exceptions}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{Test if the exception is raised} \tn 
% Row Count 1 (+ 1)
% Row 1
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\mymulticolumn{1}{x{8.4cm}}{`def test\_zero\_division():\{\{nl\}\}  with pytest.raises(ZeroDivisionError):\{\{nl\}\}    1 / 0`} \tn 
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% Row 2
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\mymulticolumn{1}{x{8.4cm}}{Test for specific exception info} \tn 
% Row Count 4 (+ 1)
% Row 3
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\mymulticolumn{1}{x{8.4cm}}{`def test\_recursion\_depth():\{\{nl\}\}  with \seqsplit{pytest.raises(RuntimeError)} as excinfo:\{\{nl\}\}    assert "maximum" in str(excinfo.value)`} \tn 
% Row Count 7 (+ 3)
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\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{MultiThreading}}  \tn
% Row 0
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`pip install pytest-xdist\{\{nl\}\} pytest tests/ -n 3` & Pytest does not run in parallel by default, therefor we need to enable this behaviour through a plugin. \tn 
% Row Count 6 (+ 6)
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\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Fixtures}}  \tn
% Row 0
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\mymulticolumn{2}{x{8.4cm}}{In testing, a fixture provides a defined, reliable and consistent context for the tests. This could include environment (for example a database configured with known parameters) or content (such as a dataset).} \tn 
% Row Count 5 (+ 5)
% Row 1
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`@pytest.fixture\{\{nl\}\} def input\_value():\{\{nl\}\}    input = 10\{\{nl\}\}    return input` & Create fixture in conftest \tn 
% Row Count 10 (+ 5)
% Row 2
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`def test\_divisible\_by\_3(input\_value):\{\{nl\}\}    assert input\_value \% 3 == 0` & Use it in tests \tn 
% Row Count 14 (+ 4)
% Row 3
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`@pytest.fixture\{\{nl\}\} def sending\_user(mail\_admin):\{\{nl\}\}     user = mail\_admin.create\_user()\{\{nl\}\}     yield user\{\{nl\}\}     \seqsplit{mail\_admin.delete\_user(user)`} & using yield to setup and teardown test environment \tn 
% Row Count 22 (+ 8)
% Row 4
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\{\{literal\}\}@pytest.fixture(scope="function") & \{\{rowspan=4\}\} Pytest fixtures have scope. This scope controls how often the fixture is executed or, in other words, how often the setup and teardown of the fixture is performed. \tn 
% Row Count 31 (+ 9)
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\par\addvspace{1.3em}

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\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Fixtures (cont)}}  \tn
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\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Data parameterization}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{The builtin pytest.mark.parametrize decorator enables parametrization of arguments for a test function} \tn 
% Row Count 3 (+ 3)
% Row 1
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\mymulticolumn{1}{x{8.4cm}}{Define parametrized tests} \tn 
% Row Count 4 (+ 1)
% Row 2
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\mymulticolumn{1}{x{8.4cm}}{\seqsplit{`@pytest.mark.parametrize("num}, output",\{\{nl\}\} {[}(1,11),(2,22),(3,35),(4,44){]})\{\{nl\}\}def \seqsplit{test\_multiplication\_11(num}, output):\{\{nl\}\}    assert 11*num == output`} \tn 
% Row Count 8 (+ 4)
% Row 3
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\mymulticolumn{1}{x{8.4cm}}{Running specific tests of a parametrized test.} \tn 
% Row Count 9 (+ 1)
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\mymulticolumn{1}{x{8.4cm}}{test\_mod.py::test\_multiplication\_11{[}2-22{]}} \tn 
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\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}