|
1 |
|
2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" |
|
3 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
|
4 |
|
5 |
|
6 <html xmlns="http://www.w3.org/1999/xhtml"> |
|
7 <head> |
|
8 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
|
9 |
|
10 <title>Mocking Magic Methods — Mock 1.0.0 documentation</title> |
|
11 |
|
12 <link rel="stylesheet" href="_static/nature.css" type="text/css" /> |
|
13 <link rel="stylesheet" href="_static/pygments.css" type="text/css" /> |
|
14 |
|
15 <script type="text/javascript"> |
|
16 var DOCUMENTATION_OPTIONS = { |
|
17 URL_ROOT: '', |
|
18 VERSION: '1.0.0', |
|
19 COLLAPSE_INDEX: false, |
|
20 FILE_SUFFIX: '.html', |
|
21 HAS_SOURCE: true |
|
22 }; |
|
23 </script> |
|
24 <script type="text/javascript" src="_static/jquery.js"></script> |
|
25 <script type="text/javascript" src="_static/underscore.js"></script> |
|
26 <script type="text/javascript" src="_static/doctools.js"></script> |
|
27 <link rel="top" title="Mock 1.0.0 documentation" href="index.html" /> |
|
28 <link rel="next" title="Getting Started with Mock" href="getting-started.html" /> |
|
29 <link rel="prev" title="Sentinel" href="sentinel.html" /> |
|
30 </head> |
|
31 <body> |
|
32 <div class="related"> |
|
33 <h3>Navigation</h3> |
|
34 <ul> |
|
35 <li class="right" style="margin-right: 10px"> |
|
36 <a href="genindex.html" title="General Index" |
|
37 accesskey="I">index</a></li> |
|
38 <li class="right" > |
|
39 <a href="getting-started.html" title="Getting Started with Mock" |
|
40 accesskey="N">next</a> |</li> |
|
41 <li class="right" > |
|
42 <a href="sentinel.html" title="Sentinel" |
|
43 accesskey="P">previous</a> |</li> |
|
44 <li><a href="index.html">Mock 1.0.0 documentation</a> »</li> |
|
45 </ul> |
|
46 </div> |
|
47 |
|
48 <div class="document"> |
|
49 <div class="documentwrapper"> |
|
50 <div class="bodywrapper"> |
|
51 <div class="body"> |
|
52 |
|
53 <div class="section" id="mocking-magic-methods"> |
|
54 <span id="magic-methods"></span><h1>Mocking Magic Methods<a class="headerlink" href="#mocking-magic-methods" title="Permalink to this headline">¶</a></h1> |
|
55 <p><a class="reference internal" href="mock.html#mock.Mock" title="mock.Mock"><tt class="xref py py-class docutils literal"><span class="pre">Mock</span></tt></a> supports mocking <a class="reference external" href="http://www.ironpythoninaction.com/magic-methods.html">magic methods</a>. This allows mock |
|
56 objects to replace containers or other objects that implement Python |
|
57 protocols.</p> |
|
58 <p>Because magic methods are looked up differently from normal methods <a class="footnote-reference" href="#id4" id="id2">[1]</a>, this |
|
59 support has been specially implemented. This means that only specific magic |
|
60 methods are supported. The supported list includes <em>almost</em> all of them. If |
|
61 there are any missing that you need please let us know!</p> |
|
62 <p>You mock magic methods by setting the method you are interested in to a function |
|
63 or a mock instance. If you are using a function then it <em>must</em> take <tt class="docutils literal"><span class="pre">self</span></tt> as |
|
64 the first argument <a class="footnote-reference" href="#id5" id="id3">[2]</a>.</p> |
|
65 <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="k">def</span> <span class="nf">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
|
66 <span class="gp">... </span> <span class="k">return</span> <span class="s">'fooble'</span> |
|
67 <span class="gp">...</span> |
|
68 <span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">()</span> |
|
69 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__str__</span> <span class="o">=</span> <span class="n">__str__</span> |
|
70 <span class="gp">>>> </span><span class="nb">str</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
71 <span class="go">'fooble'</span> |
|
72 |
|
73 <span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">()</span> |
|
74 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__str__</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">()</span> |
|
75 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__str__</span><span class="o">.</span><span class="n">return_value</span> <span class="o">=</span> <span class="s">'fooble'</span> |
|
76 <span class="gp">>>> </span><span class="nb">str</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
77 <span class="go">'fooble'</span> |
|
78 |
|
79 <span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">()</span> |
|
80 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__iter__</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">(</span><span class="n">return_value</span><span class="o">=</span><span class="nb">iter</span><span class="p">([]))</span> |
|
81 <span class="gp">>>> </span><span class="nb">list</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
82 <span class="go">[]</span> |
|
83 </pre></div> |
|
84 </div> |
|
85 <p>One use case for this is for mocking objects used as context managers in a |
|
86 <cite>with</cite> statement:</p> |
|
87 <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">()</span> |
|
88 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__enter__</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">(</span><span class="n">return_value</span><span class="o">=</span><span class="s">'foo'</span><span class="p">)</span> |
|
89 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__exit__</span> <span class="o">=</span> <span class="n">Mock</span><span class="p">(</span><span class="n">return_value</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span> |
|
90 <span class="gp">>>> </span><span class="k">with</span> <span class="n">mock</span> <span class="k">as</span> <span class="n">m</span><span class="p">:</span> |
|
91 <span class="gp">... </span> <span class="k">assert</span> <span class="n">m</span> <span class="o">==</span> <span class="s">'foo'</span> |
|
92 <span class="gp">...</span> |
|
93 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__enter__</span><span class="o">.</span><span class="n">assert_called_with</span><span class="p">()</span> |
|
94 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__exit__</span><span class="o">.</span><span class="n">assert_called_with</span><span class="p">(</span><span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span> |
|
95 </pre></div> |
|
96 </div> |
|
97 <p>Calls to magic methods do not appear in <a class="reference internal" href="mock.html#mock.Mock.method_calls" title="mock.Mock.method_calls"><tt class="xref py py-attr docutils literal"><span class="pre">method_calls</span></tt></a>, but they |
|
98 are recorded in <a class="reference internal" href="mock.html#mock.Mock.mock_calls" title="mock.Mock.mock_calls"><tt class="xref py py-attr docutils literal"><span class="pre">mock_calls</span></tt></a>.</p> |
|
99 <div class="admonition note"> |
|
100 <p class="first admonition-title">Note</p> |
|
101 <p class="last">If you use the <cite>spec</cite> keyword argument to create a mock then attempting to |
|
102 set a magic method that isn’t in the spec will raise an <cite>AttributeError</cite>.</p> |
|
103 </div> |
|
104 <p>The full list of supported magic methods is:</p> |
|
105 <ul class="simple"> |
|
106 <li><tt class="docutils literal"><span class="pre">__hash__</span></tt>, <tt class="docutils literal"><span class="pre">__sizeof__</span></tt>, <tt class="docutils literal"><span class="pre">__repr__</span></tt> and <tt class="docutils literal"><span class="pre">__str__</span></tt></li> |
|
107 <li><tt class="docutils literal"><span class="pre">__dir__</span></tt>, <tt class="docutils literal"><span class="pre">__format__</span></tt> and <tt class="docutils literal"><span class="pre">__subclasses__</span></tt></li> |
|
108 <li><tt class="docutils literal"><span class="pre">__floor__</span></tt>, <tt class="docutils literal"><span class="pre">__trunc__</span></tt> and <tt class="docutils literal"><span class="pre">__ceil__</span></tt></li> |
|
109 <li>Comparisons: <tt class="docutils literal"><span class="pre">__cmp__</span></tt>, <tt class="docutils literal"><span class="pre">__lt__</span></tt>, <tt class="docutils literal"><span class="pre">__gt__</span></tt>, <tt class="docutils literal"><span class="pre">__le__</span></tt>, <tt class="docutils literal"><span class="pre">__ge__</span></tt>, |
|
110 <tt class="docutils literal"><span class="pre">__eq__</span></tt> and <tt class="docutils literal"><span class="pre">__ne__</span></tt></li> |
|
111 <li>Container methods: <tt class="docutils literal"><span class="pre">__getitem__</span></tt>, <tt class="docutils literal"><span class="pre">__setitem__</span></tt>, <tt class="docutils literal"><span class="pre">__delitem__</span></tt>, |
|
112 <tt class="docutils literal"><span class="pre">__contains__</span></tt>, <tt class="docutils literal"><span class="pre">__len__</span></tt>, <tt class="docutils literal"><span class="pre">__iter__</span></tt>, <tt class="docutils literal"><span class="pre">__getslice__</span></tt>, |
|
113 <tt class="docutils literal"><span class="pre">__setslice__</span></tt>, <tt class="docutils literal"><span class="pre">__reversed__</span></tt> and <tt class="docutils literal"><span class="pre">__missing__</span></tt></li> |
|
114 <li>Context manager: <tt class="docutils literal"><span class="pre">__enter__</span></tt> and <tt class="docutils literal"><span class="pre">__exit__</span></tt></li> |
|
115 <li>Unary numeric methods: <tt class="docutils literal"><span class="pre">__neg__</span></tt>, <tt class="docutils literal"><span class="pre">__pos__</span></tt> and <tt class="docutils literal"><span class="pre">__invert__</span></tt></li> |
|
116 <li>The numeric methods (including right hand and in-place variants): |
|
117 <tt class="docutils literal"><span class="pre">__add__</span></tt>, <tt class="docutils literal"><span class="pre">__sub__</span></tt>, <tt class="docutils literal"><span class="pre">__mul__</span></tt>, <tt class="docutils literal"><span class="pre">__div__</span></tt>, |
|
118 <tt class="docutils literal"><span class="pre">__floordiv__</span></tt>, <tt class="docutils literal"><span class="pre">__mod__</span></tt>, <tt class="docutils literal"><span class="pre">__divmod__</span></tt>, <tt class="docutils literal"><span class="pre">__lshift__</span></tt>, |
|
119 <tt class="docutils literal"><span class="pre">__rshift__</span></tt>, <tt class="docutils literal"><span class="pre">__and__</span></tt>, <tt class="docutils literal"><span class="pre">__xor__</span></tt>, <tt class="docutils literal"><span class="pre">__or__</span></tt>, and <tt class="docutils literal"><span class="pre">__pow__</span></tt></li> |
|
120 <li>Numeric conversion methods: <tt class="docutils literal"><span class="pre">__complex__</span></tt>, <tt class="docutils literal"><span class="pre">__int__</span></tt>, <tt class="docutils literal"><span class="pre">__float__</span></tt>, |
|
121 <tt class="docutils literal"><span class="pre">__index__</span></tt> and <tt class="docutils literal"><span class="pre">__coerce__</span></tt></li> |
|
122 <li>Descriptor methods: <tt class="docutils literal"><span class="pre">__get__</span></tt>, <tt class="docutils literal"><span class="pre">__set__</span></tt> and <tt class="docutils literal"><span class="pre">__delete__</span></tt></li> |
|
123 <li>Pickling: <tt class="docutils literal"><span class="pre">__reduce__</span></tt>, <tt class="docutils literal"><span class="pre">__reduce_ex__</span></tt>, <tt class="docutils literal"><span class="pre">__getinitargs__</span></tt>, |
|
124 <tt class="docutils literal"><span class="pre">__getnewargs__</span></tt>, <tt class="docutils literal"><span class="pre">__getstate__</span></tt> and <tt class="docutils literal"><span class="pre">__setstate__</span></tt></li> |
|
125 </ul> |
|
126 <p>The following methods are supported in Python 2 but don’t exist in Python 3:</p> |
|
127 <ul class="simple"> |
|
128 <li><tt class="docutils literal"><span class="pre">__unicode__</span></tt>, <tt class="docutils literal"><span class="pre">__long__</span></tt>, <tt class="docutils literal"><span class="pre">__oct__</span></tt>, <tt class="docutils literal"><span class="pre">__hex__</span></tt> and <tt class="docutils literal"><span class="pre">__nonzero__</span></tt></li> |
|
129 <li><tt class="docutils literal"><span class="pre">__truediv__</span></tt> and <tt class="docutils literal"><span class="pre">__rtruediv__</span></tt></li> |
|
130 </ul> |
|
131 <p>The following methods are supported in Python 3 but don’t exist in Python 2:</p> |
|
132 <ul class="simple"> |
|
133 <li><tt class="docutils literal"><span class="pre">__bool__</span></tt> and <tt class="docutils literal"><span class="pre">__next__</span></tt></li> |
|
134 </ul> |
|
135 <p>The following methods exist but are <em>not</em> supported as they are either in use by |
|
136 mock, can’t be set dynamically, or can cause problems:</p> |
|
137 <ul class="simple"> |
|
138 <li><tt class="docutils literal"><span class="pre">__getattr__</span></tt>, <tt class="docutils literal"><span class="pre">__setattr__</span></tt>, <tt class="docutils literal"><span class="pre">__init__</span></tt> and <tt class="docutils literal"><span class="pre">__new__</span></tt></li> |
|
139 <li><tt class="docutils literal"><span class="pre">__prepare__</span></tt>, <tt class="docutils literal"><span class="pre">__instancecheck__</span></tt>, <tt class="docutils literal"><span class="pre">__subclasscheck__</span></tt>, <tt class="docutils literal"><span class="pre">__del__</span></tt></li> |
|
140 </ul> |
|
141 </div> |
|
142 <div class="section" id="magic-mock"> |
|
143 <h1>Magic Mock<a class="headerlink" href="#magic-mock" title="Permalink to this headline">¶</a></h1> |
|
144 <p>There are two <cite>MagicMock</cite> variants: <cite>MagicMock</cite> and <cite>NonCallableMagicMock</cite>.</p> |
|
145 <dl class="class"> |
|
146 <dt id="mock.MagicMock"> |
|
147 <em class="property">class </em><tt class="descname">MagicMock</tt><big>(</big><em>*args</em>, <em>**kw</em><big>)</big><a class="headerlink" href="#mock.MagicMock" title="Permalink to this definition">¶</a></dt> |
|
148 <dd><p><tt class="docutils literal"><span class="pre">MagicMock</span></tt> is a subclass of <a class="reference internal" href="mock.html#mock.Mock" title="mock.Mock"><tt class="xref py py-class docutils literal"><span class="pre">Mock</span></tt></a> with default implementations |
|
149 of most of the magic methods. You can use <tt class="docutils literal"><span class="pre">MagicMock</span></tt> without having to |
|
150 configure the magic methods yourself.</p> |
|
151 <p>The constructor parameters have the same meaning as for <a class="reference internal" href="mock.html#mock.Mock" title="mock.Mock"><tt class="xref py py-class docutils literal"><span class="pre">Mock</span></tt></a>.</p> |
|
152 <p>If you use the <cite>spec</cite> or <cite>spec_set</cite> arguments then <em>only</em> magic methods |
|
153 that exist in the spec will be created.</p> |
|
154 </dd></dl> |
|
155 |
|
156 <dl class="class"> |
|
157 <dt id="mock.NonCallableMagicMock"> |
|
158 <em class="property">class </em><tt class="descname">NonCallableMagicMock</tt><big>(</big><em>*args</em>, <em>**kw</em><big>)</big><a class="headerlink" href="#mock.NonCallableMagicMock" title="Permalink to this definition">¶</a></dt> |
|
159 <dd><p>A non-callable version of <cite>MagicMock</cite>.</p> |
|
160 <p>The constructor parameters have the same meaning as for |
|
161 <a class="reference internal" href="#mock.MagicMock" title="mock.MagicMock"><tt class="xref py py-class docutils literal"><span class="pre">MagicMock</span></tt></a>, with the exception of <cite>return_value</cite> and |
|
162 <cite>side_effect</cite> which have no meaning on a non-callable mock.</p> |
|
163 </dd></dl> |
|
164 |
|
165 <p>The magic methods are setup with <cite>MagicMock</cite> objects, so you can configure them |
|
166 and use them in the usual way:</p> |
|
167 <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">MagicMock</span><span class="p">()</span> |
|
168 <span class="gp">>>> </span><span class="n">mock</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span> <span class="o">=</span> <span class="s">'fish'</span> |
|
169 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__setitem__</span><span class="o">.</span><span class="n">assert_called_with</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="s">'fish'</span><span class="p">)</span> |
|
170 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__getitem__</span><span class="o">.</span><span class="n">return_value</span> <span class="o">=</span> <span class="s">'result'</span> |
|
171 <span class="gp">>>> </span><span class="n">mock</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> |
|
172 <span class="go">'result'</span> |
|
173 </pre></div> |
|
174 </div> |
|
175 <p>By default many of the protocol methods are required to return objects of a |
|
176 specific type. These methods are preconfigured with a default return value, so |
|
177 that they can be used without you having to do anything if you aren’t interested |
|
178 in the return value. You can still <em>set</em> the return value manually if you want |
|
179 to change the default.</p> |
|
180 <p>Methods and their defaults:</p> |
|
181 <ul class="simple"> |
|
182 <li><tt class="docutils literal"><span class="pre">__lt__</span></tt>: NotImplemented</li> |
|
183 <li><tt class="docutils literal"><span class="pre">__gt__</span></tt>: NotImplemented</li> |
|
184 <li><tt class="docutils literal"><span class="pre">__le__</span></tt>: NotImplemented</li> |
|
185 <li><tt class="docutils literal"><span class="pre">__ge__</span></tt>: NotImplemented</li> |
|
186 <li><tt class="docutils literal"><span class="pre">__int__</span></tt> : 1</li> |
|
187 <li><tt class="docutils literal"><span class="pre">__contains__</span></tt> : False</li> |
|
188 <li><tt class="docutils literal"><span class="pre">__len__</span></tt> : 1</li> |
|
189 <li><tt class="docutils literal"><span class="pre">__iter__</span></tt> : iter([])</li> |
|
190 <li><tt class="docutils literal"><span class="pre">__exit__</span></tt> : False</li> |
|
191 <li><tt class="docutils literal"><span class="pre">__complex__</span></tt> : 1j</li> |
|
192 <li><tt class="docutils literal"><span class="pre">__float__</span></tt> : 1.0</li> |
|
193 <li><tt class="docutils literal"><span class="pre">__bool__</span></tt> : True</li> |
|
194 <li><tt class="docutils literal"><span class="pre">__nonzero__</span></tt> : True</li> |
|
195 <li><tt class="docutils literal"><span class="pre">__oct__</span></tt> : ‘1’</li> |
|
196 <li><tt class="docutils literal"><span class="pre">__hex__</span></tt> : ‘0x1’</li> |
|
197 <li><tt class="docutils literal"><span class="pre">__long__</span></tt> : long(1)</li> |
|
198 <li><tt class="docutils literal"><span class="pre">__index__</span></tt> : 1</li> |
|
199 <li><tt class="docutils literal"><span class="pre">__hash__</span></tt> : default hash for the mock</li> |
|
200 <li><tt class="docutils literal"><span class="pre">__str__</span></tt> : default str for the mock</li> |
|
201 <li><tt class="docutils literal"><span class="pre">__unicode__</span></tt> : default unicode for the mock</li> |
|
202 <li><tt class="docutils literal"><span class="pre">__sizeof__</span></tt>: default sizeof for the mock</li> |
|
203 </ul> |
|
204 <p>For example:</p> |
|
205 <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">MagicMock</span><span class="p">()</span> |
|
206 <span class="gp">>>> </span><span class="nb">int</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
207 <span class="go">1</span> |
|
208 <span class="gp">>>> </span><span class="nb">len</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
209 <span class="go">0</span> |
|
210 <span class="gp">>>> </span><span class="nb">hex</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
211 <span class="go">'0x1'</span> |
|
212 <span class="gp">>>> </span><span class="nb">list</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
213 <span class="go">[]</span> |
|
214 <span class="gp">>>> </span><span class="nb">object</span><span class="p">()</span> <span class="ow">in</span> <span class="n">mock</span> |
|
215 <span class="go">False</span> |
|
216 </pre></div> |
|
217 </div> |
|
218 <p>The two equality method, <cite>__eq__</cite> and <cite>__ne__</cite>, are special (changed in |
|
219 0.7.2). They do the default equality comparison on identity, using a side |
|
220 effect, unless you change their return value to return something else:</p> |
|
221 <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">MagicMock</span><span class="p">()</span> <span class="o">==</span> <span class="mi">3</span> |
|
222 <span class="go">False</span> |
|
223 <span class="gp">>>> </span><span class="n">MagicMock</span><span class="p">()</span> <span class="o">!=</span> <span class="mi">3</span> |
|
224 <span class="go">True</span> |
|
225 <span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">MagicMock</span><span class="p">()</span> |
|
226 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__eq__</span><span class="o">.</span><span class="n">return_value</span> <span class="o">=</span> <span class="bp">True</span> |
|
227 <span class="gp">>>> </span><span class="n">mock</span> <span class="o">==</span> <span class="mi">3</span> |
|
228 <span class="go">True</span> |
|
229 </pre></div> |
|
230 </div> |
|
231 <p>In <cite>0.8</cite> the <cite>__iter__</cite> also gained special handling implemented with a |
|
232 side effect. The return value of <cite>MagicMock.__iter__</cite> can be any iterable |
|
233 object and isn’t required to be an iterator:</p> |
|
234 <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">mock</span> <span class="o">=</span> <span class="n">MagicMock</span><span class="p">()</span> |
|
235 <span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__iter__</span><span class="o">.</span><span class="n">return_value</span> <span class="o">=</span> <span class="p">[</span><span class="s">'a'</span><span class="p">,</span> <span class="s">'b'</span><span class="p">,</span> <span class="s">'c'</span><span class="p">]</span> |
|
236 <span class="gp">>>> </span><span class="nb">list</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
237 <span class="go">['a', 'b', 'c']</span> |
|
238 <span class="gp">>>> </span><span class="nb">list</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
239 <span class="go">['a', 'b', 'c']</span> |
|
240 </pre></div> |
|
241 </div> |
|
242 <p>If the return value <em>is</em> an iterator, then iterating over it once will consume |
|
243 it and subsequent iterations will result in an empty list:</p> |
|
244 <div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="n">mock</span><span class="o">.</span><span class="n">__iter__</span><span class="o">.</span><span class="n">return_value</span> <span class="o">=</span> <span class="nb">iter</span><span class="p">([</span><span class="s">'a'</span><span class="p">,</span> <span class="s">'b'</span><span class="p">,</span> <span class="s">'c'</span><span class="p">])</span> |
|
245 <span class="gp">>>> </span><span class="nb">list</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
246 <span class="go">['a', 'b', 'c']</span> |
|
247 <span class="gp">>>> </span><span class="nb">list</span><span class="p">(</span><span class="n">mock</span><span class="p">)</span> |
|
248 <span class="go">[]</span> |
|
249 </pre></div> |
|
250 </div> |
|
251 <p><tt class="docutils literal"><span class="pre">MagicMock</span></tt> has all of the supported magic methods configured except for some |
|
252 of the obscure and obsolete ones. You can still set these up if you want.</p> |
|
253 <p>Magic methods that are supported but not setup by default in <tt class="docutils literal"><span class="pre">MagicMock</span></tt> are:</p> |
|
254 <ul class="simple"> |
|
255 <li><tt class="docutils literal"><span class="pre">__cmp__</span></tt></li> |
|
256 <li><tt class="docutils literal"><span class="pre">__getslice__</span></tt> and <tt class="docutils literal"><span class="pre">__setslice__</span></tt></li> |
|
257 <li><tt class="docutils literal"><span class="pre">__coerce__</span></tt></li> |
|
258 <li><tt class="docutils literal"><span class="pre">__subclasses__</span></tt></li> |
|
259 <li><tt class="docutils literal"><span class="pre">__dir__</span></tt></li> |
|
260 <li><tt class="docutils literal"><span class="pre">__format__</span></tt></li> |
|
261 <li><tt class="docutils literal"><span class="pre">__get__</span></tt>, <tt class="docutils literal"><span class="pre">__set__</span></tt> and <tt class="docutils literal"><span class="pre">__delete__</span></tt></li> |
|
262 <li><tt class="docutils literal"><span class="pre">__reversed__</span></tt> and <tt class="docutils literal"><span class="pre">__missing__</span></tt></li> |
|
263 <li><tt class="docutils literal"><span class="pre">__reduce__</span></tt>, <tt class="docutils literal"><span class="pre">__reduce_ex__</span></tt>, <tt class="docutils literal"><span class="pre">__getinitargs__</span></tt>, <tt class="docutils literal"><span class="pre">__getnewargs__</span></tt>, |
|
264 <tt class="docutils literal"><span class="pre">__getstate__</span></tt> and <tt class="docutils literal"><span class="pre">__setstate__</span></tt></li> |
|
265 <li><tt class="docutils literal"><span class="pre">__getformat__</span></tt> and <tt class="docutils literal"><span class="pre">__setformat__</span></tt></li> |
|
266 </ul> |
|
267 <hr class="docutils" /> |
|
268 <table class="docutils footnote" frame="void" id="id4" rules="none"> |
|
269 <colgroup><col class="label" /><col /></colgroup> |
|
270 <tbody valign="top"> |
|
271 <tr><td class="label"><a class="fn-backref" href="#id2">[1]</a></td><td>Magic methods <em>should</em> be looked up on the class rather than the |
|
272 instance. Different versions of Python are inconsistent about applying this |
|
273 rule. The supported protocol methods should work with all supported versions |
|
274 of Python.</td></tr> |
|
275 </tbody> |
|
276 </table> |
|
277 <table class="docutils footnote" frame="void" id="id5" rules="none"> |
|
278 <colgroup><col class="label" /><col /></colgroup> |
|
279 <tbody valign="top"> |
|
280 <tr><td class="label"><a class="fn-backref" href="#id3">[2]</a></td><td>The function is basically hooked up to the class, but each <tt class="docutils literal"><span class="pre">Mock</span></tt> |
|
281 instance is kept isolated from the others.</td></tr> |
|
282 </tbody> |
|
283 </table> |
|
284 </div> |
|
285 |
|
286 |
|
287 </div> |
|
288 </div> |
|
289 </div> |
|
290 <div class="sphinxsidebar"> |
|
291 <div class="sphinxsidebarwrapper"> |
|
292 <h3><a href="index.html">Table Of Contents</a></h3> |
|
293 <ul> |
|
294 <li><a class="reference internal" href="#">Mocking Magic Methods</a></li> |
|
295 <li><a class="reference internal" href="#magic-mock">Magic Mock</a></li> |
|
296 </ul> |
|
297 |
|
298 <h4>Previous topic</h4> |
|
299 <p class="topless"><a href="sentinel.html" |
|
300 title="previous chapter">Sentinel</a></p> |
|
301 <h4>Next topic</h4> |
|
302 <p class="topless"><a href="getting-started.html" |
|
303 title="next chapter">Getting Started with Mock</a></p> |
|
304 <h3>This Page</h3> |
|
305 <ul class="this-page-menu"> |
|
306 <li><a href="_sources/magicmock.txt" |
|
307 rel="nofollow">Show Source</a></li> |
|
308 </ul> |
|
309 <div id="searchbox" style="display: none"> |
|
310 <h3>Quick search</h3> |
|
311 <form class="search" action="search.html" method="get"> |
|
312 <input type="text" name="q" /> |
|
313 <input type="submit" value="Go" /> |
|
314 <input type="hidden" name="check_keywords" value="yes" /> |
|
315 <input type="hidden" name="area" value="default" /> |
|
316 </form> |
|
317 <p class="searchtip" style="font-size: 90%"> |
|
318 Enter search terms or a module, class or function name. |
|
319 </p> |
|
320 </div> |
|
321 <script type="text/javascript">$('#searchbox').show(0);</script> |
|
322 </div> |
|
323 </div> |
|
324 <div class="clearer"></div> |
|
325 </div> |
|
326 <div class="related"> |
|
327 <h3>Navigation</h3> |
|
328 <ul> |
|
329 <li class="right" style="margin-right: 10px"> |
|
330 <a href="genindex.html" title="General Index" |
|
331 >index</a></li> |
|
332 <li class="right" > |
|
333 <a href="getting-started.html" title="Getting Started with Mock" |
|
334 >next</a> |</li> |
|
335 <li class="right" > |
|
336 <a href="sentinel.html" title="Sentinel" |
|
337 >previous</a> |</li> |
|
338 <li><a href="index.html">Mock 1.0.0 documentation</a> »</li> |
|
339 </ul> |
|
340 </div> |
|
341 <div class="footer"> |
|
342 © Copyright 2007-2012, Michael Foord & the mock team. |
|
343 Last updated on Oct 07, 2012. |
|
344 Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.1.3. |
|
345 </div> |
|
346 </body> |
|
347 </html> |