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<li class="toctree-l1 current"><a class="current reference internal" href="#">Getting Started with Moto</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#installing-moto">Installing Moto</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#moto-usage">Moto usage</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="#decorator">Decorator</a></li>
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<div class="section" id="getting-started-with-moto">
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<h1>Getting Started with Moto<a class="headerlink" href="#getting-started-with-moto" title="Permalink to this headline">¶</a></h1>
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<div class="section" id="installing-moto">
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<h2>Installing Moto<a class="headerlink" href="#installing-moto" title="Permalink to this headline">¶</a></h2>
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<p>You can use <code class="docutils literal"><span class="pre">pip</span></code> to install the latest released version of <code class="docutils literal"><span class="pre">moto</span></code>:</p>
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<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">pip</span> <span class="n">install</span> <span class="n">moto</span>
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</pre></div>
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</div>
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<p>If you want to install <code class="docutils literal"><span class="pre">moto</span></code> from source:</p>
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<div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">git</span> <span class="n">clone</span> <span class="n">git</span><span class="p">:</span><span class="o">//</span><span class="n">github</span><span class="o">.</span><span class="n">com</span><span class="o">/</span><span class="n">spulec</span><span class="o">/</span><span class="n">moto</span><span class="o">.</span><span class="n">git</span>
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<span class="n">cd</span> <span class="n">moto</span>
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<span class="n">python</span> <span class="n">setup</span><span class="o">.</span><span class="n">py</span> <span class="n">install</span>
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</pre></div>
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</div>
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</div>
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<div class="section" id="moto-usage">
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<h2>Moto usage<a class="headerlink" href="#moto-usage" title="Permalink to this headline">¶</a></h2>
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<p>For example we have the following code we want to test:</p>
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<div class="highlight-python"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">boto</span>
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<span class="kn">from</span> <span class="nn">boto.s3.key</span> <span class="kn">import</span> <span class="n">Key</span>
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<span class="k">class</span> <span class="nc">MyModel</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
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<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">name</span> <span class="o">=</span> <span class="n">name</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">value</span> <span class="o">=</span> <span class="n">value</span>
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<span class="k">def</span> <span class="nf">save</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="n">conn</span> <span class="o">=</span> <span class="n">boto</span><span class="o">.</span><span class="n">connect_s3</span><span class="p">()</span>
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<span class="n">bucket</span> <span class="o">=</span> <span class="n">conn</span><span class="o">.</span><span class="n">get_bucket</span><span class="p">(</span><span class="s1">'mybucket'</span><span class="p">)</span>
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<span class="n">k</span> <span class="o">=</span> <span class="n">Key</span><span class="p">(</span><span class="n">bucket</span><span class="p">)</span>
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<span class="n">k</span><span class="o">.</span><span class="n">key</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span>
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<span class="n">k</span><span class="o">.</span><span class="n">set_contents_from_string</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">value</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>There are several method to do this, just keep in mind Moto creates a full blank environment.</p>
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<div class="section" id="decorator">
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<h3>Decorator<a class="headerlink" href="#decorator" title="Permalink to this headline">¶</a></h3>
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<p>With a decorator wrapping all the calls to S3 are automatically mocked out.</p>
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<div class="highlight-python"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">boto</span>
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<span class="kn">from</span> <span class="nn">moto</span> <span class="kn">import</span> <span class="n">mock_s3</span>
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<span class="kn">from</span> <span class="nn">mymodule</span> <span class="kn">import</span> <span class="n">MyModel</span>
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<span class="nd">@mock_s3</span>
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<span class="k">def</span> <span class="nf">test_my_model_save</span><span class="p">():</span>
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<span class="n">conn</span> <span class="o">=</span> <span class="n">boto</span><span class="o">.</span><span class="n">connect_s3</span><span class="p">()</span>
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<span class="c1"># We need to create the bucket since this is all in Moto's 'virtual' AWS account</span>
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<span class="n">conn</span><span class="o">.</span><span class="n">create_bucket</span><span class="p">(</span><span class="s1">'mybucket'</span><span class="p">)</span>
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<span class="n">model_instance</span> <span class="o">=</span> <span class="n">MyModel</span><span class="p">(</span><span class="s1">'steve'</span><span class="p">,</span> <span class="s1">'is awesome'</span><span class="p">)</span>
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<span class="n">model_instance</span><span class="o">.</span><span class="n">save</span><span class="p">()</span>
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<span class="k">assert</span> <span class="n">conn</span><span class="o">.</span><span class="n">get_bucket</span><span class="p">(</span><span class="s1">'mybucket'</span><span class="p">)</span><span class="o">.</span><span class="n">get_key</span><span class="p">(</span><span class="s1">'steve'</span><span class="p">)</span><span class="o">.</span><span class="n">get_contents_as_string</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'is awesome'</span>
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</pre></div>
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</div>
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</div>
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<div class="section" id="context-manager">
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<h3>Context manager<a class="headerlink" href="#context-manager" title="Permalink to this headline">¶</a></h3>
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<p>Same as decorator, every call inside <code class="docutils literal"><span class="pre">with</span></code> statement are mocked out.</p>
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<div class="highlight-python"><div class="highlight"><pre><span></span><span class="k">def</span> <span class="nf">test_my_model_save</span><span class="p">():</span>
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<span class="k">with</span> <span class="n">mock_s3</span><span class="p">():</span>
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<span class="n">conn</span> <span class="o">=</span> <span class="n">boto</span><span class="o">.</span><span class="n">connect_s3</span><span class="p">()</span>
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<span class="n">conn</span><span class="o">.</span><span class="n">create_bucket</span><span class="p">(</span><span class="s1">'mybucket'</span><span class="p">)</span>
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<span class="n">model_instance</span> <span class="o">=</span> <span class="n">MyModel</span><span class="p">(</span><span class="s1">'steve'</span><span class="p">,</span> <span class="s1">'is awesome'</span><span class="p">)</span>
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<span class="n">model_instance</span><span class="o">.</span><span class="n">save</span><span class="p">()</span>
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<span class="k">assert</span> <span class="n">conn</span><span class="o">.</span><span class="n">get_bucket</span><span class="p">(</span><span class="s1">'mybucket'</span><span class="p">)</span><span class="o">.</span><span class="n">get_key</span><span class="p">(</span><span class="s1">'steve'</span><span class="p">)</span><span class="o">.</span><span class="n">get_contents_as_string</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'is awesome'</span>
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</pre></div>
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</div>
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</div>
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<div class="section" id="raw">
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<h3>Raw<a class="headerlink" href="#raw" title="Permalink to this headline">¶</a></h3>
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<p>You can also start and stop manually the mocking.</p>
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<div class="highlight-python"><div class="highlight"><pre><span></span><span class="k">def</span> <span class="nf">test_my_model_save</span><span class="p">():</span>
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<span class="n">mock</span> <span class="o">=</span> <span class="n">mock_s3</span><span class="p">()</span>
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<span class="n">mock</span><span class="o">.</span><span class="n">start</span><span class="p">()</span>
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<span class="n">conn</span> <span class="o">=</span> <span class="n">boto</span><span class="o">.</span><span class="n">connect_s3</span><span class="p">()</span>
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<span class="n">conn</span><span class="o">.</span><span class="n">create_bucket</span><span class="p">(</span><span class="s1">'mybucket'</span><span class="p">)</span>
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<span class="n">model_instance</span> <span class="o">=</span> <span class="n">MyModel</span><span class="p">(</span><span class="s1">'steve'</span><span class="p">,</span> <span class="s1">'is awesome'</span><span class="p">)</span>
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<span class="n">model_instance</span><span class="o">.</span><span class="n">save</span><span class="p">()</span>
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<span class="k">assert</span> <span class="n">conn</span><span class="o">.</span><span class="n">get_bucket</span><span class="p">(</span><span class="s1">'mybucket'</span><span class="p">)</span><span class="o">.</span><span class="n">get_key</span><span class="p">(</span><span class="s1">'steve'</span><span class="p">)</span><span class="o">.</span><span class="n">get_contents_as_string</span><span class="p">()</span> <span class="o">==</span> <span class="s1">'is awesome'</span>
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<span class="n">mock</span><span class="o">.</span><span class="n">stop</span><span class="p">()</span>
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</pre></div>
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</div>
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</div>
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<div class="section" id="stand-alone-server-mode">
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<h3>Stand-alone server mode<a class="headerlink" href="#stand-alone-server-mode" title="Permalink to this headline">¶</a></h3>
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<p>Moto comes with a stand-alone server allowing you to mock out an AWS HTTP endpoint. It is very useful to test even if you don’t use Python.</p>
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<div class="highlight-bash"><div class="highlight"><pre><span></span>$ moto_server ec2 -p3000
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* Running on http://127.0.0.1:3000/
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</pre></div>
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</div>
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<p>This method isn’t encouraged if you’re using <code class="docutils literal"><span class="pre">boto</span></code>, best is to use decorator method.</p>
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© Copyright 2015, Steve Pulec.
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