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Tests for forms/util.py module.
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>>> from django.forms.util import *
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>>> from django.utils.translation import ugettext_lazy
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>>> from django.forms.util import flatatt
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>>> flatatt({'id': "header"})
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>>> flatatt({'class': "news", 'title': "Read this"})
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u' class="news" title="Read this"'
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>>> print ValidationError("There was an error.").messages
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<ul class="errorlist"><li>There was an error.</li></ul>
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# Can take a unicode string.
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>>> print ValidationError(u"Not \u03C0.").messages
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<ul class="errorlist"><li>Not π.</li></ul>
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# Can take a lazy string.
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>>> print ValidationError(ugettext_lazy("Error.")).messages
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<ul class="errorlist"><li>Error.</li></ul>
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>>> print ValidationError(["Error one.", "Error two."]).messages
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<ul class="errorlist"><li>Error one.</li><li>Error two.</li></ul>
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# Can take a mixture in a list.
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>>> print ValidationError(["First error.", u"Not \u03C0.", ugettext_lazy("Error.")]).messages
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<ul class="errorlist"><li>First error.</li><li>Not π.</li><li>Error.</li></ul>
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>>> class VeryBadError:
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... def __unicode__(self): return u"A very bad error."
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# Can take a non-string.
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>>> print ValidationError(VeryBadError()).messages
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<ul class="errorlist"><li>A very bad error.</li></ul>