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-rw-r--r--tests/regressiontests/forms/widgets.py24
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/regressiontests/forms/widgets.py b/tests/regressiontests/forms/widgets.py
index 493cfa053c..4944a26b74 100644
--- a/tests/regressiontests/forms/widgets.py
+++ b/tests/regressiontests/forms/widgets.py
@@ -202,6 +202,30 @@ u'<input type="file" class="fun" name="email" />'
>>> w.render('email', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'})
u'<input type="file" class="fun" name="email" />'
+Test for the behavior of _has_changed for FileInput. The value of data will
+more than likely come from request.FILES. The value of initial data will
+likely be a filename stored in the database. Since its value is of no use to
+a FileInput it is ignored.
+
+>>> w = FileInput()
+
+# No file was uploaded and no initial data.
+>>> w._has_changed(u'', None)
+False
+
+# A file was uploaded and no initial data.
+>>> w._has_changed(u'', {'filename': 'resume.txt', 'content': 'My resume'})
+True
+
+# A file was not uploaded, but there is initial data
+>>> w._has_changed(u'resume.txt', None)
+False
+
+# A file was uploaded and there is initial data (file identity is not dealt
+# with here)
+>>> w._has_changed('resume.txt', {'filename': 'resume.txt', 'content': 'My resume'})
+True
+
# Textarea Widget #############################################################
>>> w = Textarea()