Rewrote the backends test to be more portable. Was previously failing on MySQL.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6354 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/backends/models.py

 from django.db import models
+from django.db import connection
 
 class Square(models.Model):
     root = models.IntegerField()
@@ -7,18 +8,27 @@ class Square(models.Model):
     def __unicode__(self):
         return "%s ** 2 == %s" % (self.root, self.square)
 
+if connection.features.uses_case_insensitive_names:
+    t_convert = lambda x: x.upper()
+else:
+    t_convert = lambda x: x
+qn = connection.ops.quote_name
+
 __test__ = {'API_TESTS': """
 
 #4896: Test cursor.executemany
 >>> from django.db import connection
 >>> cursor = connection.cursor()
->>> cursor.executemany('INSERT INTO BACKENDS_SQUARE (ROOT, SQUARE) VALUES (%s, %s)',
-...                    [(i, i**2) for i in range(-5, 6)]) and None or None
+>>> opts = Square._meta
+>>> f1, f2 = opts.get_field('root'), opts.get_field('square')
+>>> query = ('INSERT INTO %s (%s, %s) VALUES (%%s, %%s)'
+...         % (t_convert(opts.db_table), qn(f1.column), qn(f2.column)))
+>>> cursor.executemany(query, [(i, i**2) for i in range(-5, 6)]) and None or None
 >>> Square.objects.order_by('root')
 [<Square: -5 ** 2 == 25>, <Square: -4 ** 2 == 16>, <Square: -3 ** 2 == 9>, <Square: -2 ** 2 == 4>, <Square: -1 ** 2 == 1>, <Square: 0 ** 2 == 0>, <Square: 1 ** 2 == 1>, <Square: 2 ** 2 == 4>, <Square: 3 ** 2 == 9>, <Square: 4 ** 2 == 16>, <Square: 5 ** 2 == 25>]
 
 #4765: executemany with params=[] does nothing
->>> cursor.executemany('INSERT INTO BACKENDS_SQUARE (ROOT, SQUARE) VALUES (%s, %s)', []) and None or None
+>>> cursor.executemany(query, []) and None or None
 >>> Square.objects.count()
 11