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    Ah, I see.&nbsp; But then the successful tests are also relying on the
    getpreferredlocale() value, or you are specifying explicit encodings
    in the tests? I would still avoid mocking here.<br>
    <br>
    --Ned.<br>
    <br>
    <div class="moz-cite-prefix">On 8/29/2012 10:31 AM, Alexander
      O'Donovan-Jones wrote:<br>
    </div>
    <blockquote
cite="mid:98D0F3AAB54DF646B187C3D80D0CCFE406ED516D@RKV-IT-EXCH103.ccp.ad.local"
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        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Segoe
            UI&quot;,&quot;sans-serif&quot;;color:#1F497D">Twofold:
            first is to get an understanding of mocking complex things
            such as __builtin__ methods/classes/objects.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Segoe
            UI&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Segoe
            UI&quot;,&quot;sans-serif&quot;;color:#1F497D">Secondly, the
            example I gave is contrived. The actual use of this code
            relies upon a return from locale.getpreferredlocale() to
            determine the desired encoding to use. If I specify &#8216;cp1252&#8217;
            on computer A, with a Russian installation of Windows and it
            throws the UnicodeDecodeError then the test passes. However
            if I run it on computer B, with a different character set as
            default and the UnicodeDecodeError isn&#8217;t thrown, then my
            test fails, due to differences in the operating system,
            outside of my control.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Segoe
            UI&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Segoe
            UI&quot;,&quot;sans-serif&quot;;color:#1F497D">I want to
            control the execution of the function to ensure that the
            return after encountering the exception is correct and not
            leave it to a variable in the operating system to
            arbitrarily decide whether or not the test should pass.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
            style="font-size:10.0pt;font-family:&quot;Segoe
            UI&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span></p>
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            <p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;;color:windowtext">
                Ned Batchelder [<a class="moz-txt-link-freetext" href="mailto:ned@nedbatchelder.com">mailto:ned@nedbatchelder.com</a>]
                <br>
                <b>Sent:</b> Wednesday, 29 August, 2012 2:14 PM<br>
                <b>To:</b> Alexander O'Donovan-Jones<br>
                <b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:testing-in-python@lists.idyll.org">testing-in-python@lists.idyll.org</a><br>
                <b>Subject:</b> Re: [TIP] Mocking the .decode(...)
                method on a string<o:p></o:p></span></p>
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        <p class="MsoNormal"><o:p>&nbsp;</o:p></p>
        <p class="MsoNormal"><o:p>&nbsp;</o:p></p>
        <div>
          <p class="MsoNormal">On 8/29/2012 10:02 AM, Alexander
            O'Donovan-Jones wrote:<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
              style="font-size:10.0pt">Creating a mock object that
              raises the exceptions required is exactly the route I&#8217;m
              taking now.
            </span><o:p></o:p></p>
        </blockquote>
        <p class="MsoNormal">Yes, I can see that, but it's causing you
          trouble, and you can instead simply use two arguments to the
          function that will raise the exception, no?&nbsp; I'm not sure why
          mocking is the better approach here.<br>
          <br>
          --Ned.<o:p></o:p></p>
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