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<h1>1.7. Working Examples<a class="headerlink" href="#working-examples" title="Permalink to this headline"></a></h1>
<div class="section" id="managing-state-at-module-class-and-method-level">
<h2>1.7.1. managing state at module, class and method level<a class="headerlink" href="#managing-state-at-module-class-and-method-level" title="Permalink to this headline"></a></h2>
<p>Here is a working example for what goes on when you setup modules,
classes and methods:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="c"># [[from py/documentation/example/pytest/test_setup_flow_example.py]]</span>
<span class="k">def</span> <span class="nf">setup_module</span><span class="p">(</span><span class="n">module</span><span class="p">):</span>
<span class="n">module</span><span class="o">.</span><span class="n">TestStateFullThing</span><span class="o">.</span><span class="n">classcount</span> <span class="o">=</span> <span class="mf">0</span>
<span class="k">class</span> <span class="nc">TestStateFullThing</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">setup_class</span><span class="p">(</span><span class="n">cls</span><span class="p">):</span>
<span class="n">cls</span><span class="o">.</span><span class="n">classcount</span> <span class="o">+=</span> <span class="mf">1</span>
<span class="k">def</span> <span class="nf">teardown_class</span><span class="p">(</span><span class="n">cls</span><span class="p">):</span>
<span class="n">cls</span><span class="o">.</span><span class="n">classcount</span> <span class="o">-=</span> <span class="mf">1</span>
<span class="k">def</span> <span class="nf">setup_method</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">method</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">id</span> <span class="o">=</span> <span class="nb">eval</span><span class="p">(</span><span class="n">method</span><span class="o">.</span><span class="n">func_name</span><span class="p">[</span><span class="mf">5</span><span class="p">:])</span>
<span class="k">def</span> <span class="nf">test_42</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">classcount</span> <span class="o">==</span> <span class="mf">1</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">id</span> <span class="o">==</span> <span class="mf">42</span>
<span class="k">def</span> <span class="nf">test_23</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">classcount</span> <span class="o">==</span> <span class="mf">1</span>
<span class="k">assert</span> <span class="bp">self</span><span class="o">.</span><span class="n">id</span> <span class="o">==</span> <span class="mf">23</span>
<span class="k">def</span> <span class="nf">teardown_module</span><span class="p">(</span><span class="n">module</span><span class="p">):</span>
<span class="k">assert</span> <span class="n">module</span><span class="o">.</span><span class="n">TestStateFullThing</span><span class="o">.</span><span class="n">classcount</span> <span class="o">==</span> <span class="mf">0</span>
</pre></div>
</div>
<p>For this example the control flow happens as follows:</p>
<div class="highlight-python"><pre>import test_setup_flow_example
setup_module(test_setup_flow_example)
setup_class(TestStateFullThing)
instance = TestStateFullThing()
setup_method(instance, instance.test_42)
instance.test_42()
setup_method(instance, instance.test_23)
instance.test_23()
teardown_class(TestStateFullThing)
teardown_module(test_setup_flow_example)</pre>
</div>
<p>Note that <tt class="docutils literal"><span class="pre">setup_class(TestStateFullThing)</span></tt> is called and not
<tt class="docutils literal"><span class="pre">TestStateFullThing.setup_class()</span></tt> which would require you
to insert <tt class="docutils literal"><span class="pre">setup_class</span> <span class="pre">=</span> <span class="pre">classmethod(setup_class)</span></tt> to make
your setup function callable. Did we mention that lazyness
is a virtue?</p>
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<li><a class="reference external" href="">1.7. Working Examples</a><ul>
<li><a class="reference external" href="#managing-state-at-module-class-and-method-level">1.7.1. managing state at module, class and method level</a></li>
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