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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">An example of the failing test and the data/schema would be nice.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Certainly, I have never had to relax foreign key constraints when running tests. It sounds like maybe you have a problem with your fixture system?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> testing-in-python-bounces@lists.idyll.org [mailto:testing-in-python-bounces@lists.idyll.org]
<b>On Behalf Of </b>Sylvain Le Beux<br>
<b>Sent:</b> Tuesday, September 16, 2014 8:34 AM<br>
<b>To:</b> testing-in-python@lists.idyll.org<br>
<b>Subject:</b> [TIP] Foreign Key Constraint and model testing<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi all,<o:p></o:p></p>
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<p class="MsoNormal">This is my first post and even though I have been lurking for a while into test driven development, it's been quite new that I dived into it.<o:p></o:p></p>
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<p class="MsoNormal">The problem that caused me a great deal recently is the fact that I am doing some functional tests against a mysql database, build thanks to an sqlalchemy model.<o:p></o:p></p>
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<p class="MsoNormal">There are of course numbers of foreign key and my I discovered that the model objects are being created only if there are no foreign key constraints on the database.<o:p></o:p></p>
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<p class="MsoNormal">To make it more clear, I tested to run the tests with a setup where all foreign constraints are present (it is actually a dump of the database) and in another setup, the foreign key constraints are deleted, all other things being equal.<o:p></o:p></p>
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<p class="MsoNormal">In the first configuration, the test fails and for the latter the test is a success.<o:p></o:p></p>
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<p class="MsoNormal">Thus my interrogations : <o:p></o:p></p>
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<p class="MsoNormal">- Is this common to delete the foreign key constraints while testing against a database model ?
<o:p></o:p></p>
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<p class="MsoNormal">- If the test fails while the foreign key constraints are present, does this means the constraints are badly implemented ?<o:p></o:p></p>
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<p class="MsoNormal">- How do you tests the foreign key constraints themselves ?<o:p></o:p></p>
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<p class="MsoNormal">If you have any documentation or open source projects examples that deal with these issues, I would be very glad you'd point them to me ?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks in advance,<br>
<br>
Sylvain<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">N.B. : I tried a setup where I was letting sqlalchemy build the model itself (i.e. without the dump of the current database, and it fails even sooner during the setup process, before the tests even started)<o:p></o:p></p>
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