Merged regressiontests and modeltests into the test root.

tests/expressions/models.py

@@ -0,0 +1,32 @@
+"""
+Tests for F() query expression syntax.
+"""
+from __future__ import unicode_literals
+
+from django.db import models
+from django.utils.encoding import python_2_unicode_compatible
+
+
+@python_2_unicode_compatible
+class Employee(models.Model):
+    firstname = models.CharField(max_length=50)
+    lastname = models.CharField(max_length=50)
+
+    def __str__(self):
+        return '%s %s' % (self.firstname, self.lastname)
+
+@python_2_unicode_compatible
+class Company(models.Model):
+    name = models.CharField(max_length=100)
+    num_employees = models.PositiveIntegerField()
+    num_chairs = models.PositiveIntegerField()
+    ceo = models.ForeignKey(
+        Employee,
+        related_name='company_ceo_set')
+    point_of_contact = models.ForeignKey(
+        Employee,
+        related_name='company_point_of_contact_set',
+        null=True)
+
+    def __str__(self):
+        return self.name