Created a dedicated test directory for FilePathField tests.

tests/forms_tests/field_tests/test_filepathfield.py

 import os.path
 
-from django.forms import FilePathField, ValidationError, forms
+from django.forms import FilePathField, ValidationError
 from django.test import SimpleTestCase
 
+PATH = os.path.dirname(os.path.abspath(__file__))
+
 
 def fix_os_paths(x):
     if isinstance(x, str):
+        if x.startswith(PATH):
+            x = x[len(PATH):]
         return x.replace('\\', '/')
     elif isinstance(x, tuple):
         return tuple(fix_os_paths(list(x)))
@@ -16,104 +20,72 @@ def fix_os_paths(x):
 
 
 class FilePathFieldTest(SimpleTestCase):
+    expected_choices = [
+        ('/filepathfield_test_dir/__init__.py', '__init__.py'),
+        ('/filepathfield_test_dir/a.py', 'a.py'),
+        ('/filepathfield_test_dir/ab.py', 'ab.py'),
+        ('/filepathfield_test_dir/b.py', 'b.py'),
+        ('/filepathfield_test_dir/c/__init__.py', '__init__.py'),
+        ('/filepathfield_test_dir/c/d.py', 'd.py'),
+        ('/filepathfield_test_dir/c/e.py', 'e.py'),
+        ('/filepathfield_test_dir/c/f/__init__.py', '__init__.py'),
+        ('/filepathfield_test_dir/c/f/g.py', 'g.py'),
+    ]
+    path = os.path.join(PATH, 'filepathfield_test_dir') + '/'
 
-    def test_filepathfield_1(self):
-        path = os.path.dirname(os.path.abspath(forms.__file__)) + '/'
-        self.assertTrue(fix_os_paths(path).endswith('/django/forms/'))
+    def assertChoices(self, field, expected_choices):
+        self.assertEqual(fix_os_paths(field.choices), expected_choices)
 
-    def test_filepathfield_2(self):
-        path = os.path.dirname(os.path.abspath(forms.__file__)) + '/'
-        f = FilePathField(path=path)
-        f.choices = [p for p in f.choices if p[0].endswith('.py')]
-        f.choices.sort()
+    def test_fix_os_paths(self):
+        self.assertEqual(fix_os_paths(self.path), ('/filepathfield_test_dir/'))
+
+    def test_no_options(self):
+        f = FilePathField(path=self.path)
         expected = [
-            ('/django/forms/__init__.py', '__init__.py'),
-            ('/django/forms/boundfield.py', 'boundfield.py'),
-            ('/django/forms/fields.py', 'fields.py'),
-            ('/django/forms/forms.py', 'forms.py'),
-            ('/django/forms/formsets.py', 'formsets.py'),
-            ('/django/forms/models.py', 'models.py'),
-            ('/django/forms/renderers.py', 'renderers.py'),
-            ('/django/forms/utils.py', 'utils.py'),
-            ('/django/forms/widgets.py', 'widgets.py')
-        ]
-        for exp, got in zip(expected, fix_os_paths(f.choices)):
-            with self.subTest(expected=exp):
-                self.assertEqual(exp[1], got[1])
-                self.assertTrue(got[0].endswith(exp[0]))
-        msg = "'Select a valid choice. fields.py is not one of the available choices.'"
+            ('/filepathfield_test_dir/README', 'README'),
+        ] + self.expected_choices[:4]
+        self.assertChoices(f, expected)
+
+    def test_clean(self):
+        f = FilePathField(path=self.path)
+        msg = "'Select a valid choice. a.py is not one of the available choices.'"
         with self.assertRaisesMessage(ValidationError, msg):
-            f.clean('fields.py')
-        self.assertTrue(fix_os_paths(f.clean(path + 'fields.py')).endswith('/django/forms/fields.py'))
+            f.clean('a.py')
+        self.assertEqual(fix_os_paths(f.clean(self.path + 'a.py')), '/filepathfield_test_dir/a.py')
 
-    def test_filepathfield_3(self):
-        path = os.path.dirname(os.path.abspath(forms.__file__)) + '/'
-        f = FilePathField(path=path, match=r'^.*?\.py$')
-        f.choices.sort()
-        expected = [
-            ('/django/forms/__init__.py', '__init__.py'),
-            ('/django/forms/boundfield.py', 'boundfield.py'),
-            ('/django/forms/fields.py', 'fields.py'),
-            ('/django/forms/forms.py', 'forms.py'),
-            ('/django/forms/formsets.py', 'formsets.py'),
-            ('/django/forms/models.py', 'models.py'),
-            ('/django/forms/renderers.py', 'renderers.py'),
-            ('/django/forms/utils.py', 'utils.py'),
-            ('/django/forms/widgets.py', 'widgets.py')
-        ]
-        for exp, got in zip(expected, fix_os_paths(f.choices)):
-            with self.subTest(expected=exp):
-                self.assertEqual(exp[1], got[1])
-                self.assertTrue(got[0].endswith(exp[0]))
+    def test_match(self):
+        f = FilePathField(path=self.path, match=r'^.*?\.py$')
+        self.assertChoices(f, self.expected_choices[:4])
 
-    def test_filepathfield_4(self):
-        path = os.path.dirname(os.path.abspath(forms.__file__)) + '/'
-        f = FilePathField(path=path, recursive=True, match=r'^.*?\.py$')
+    def test_recursive(self):
+        f = FilePathField(path=self.path, recursive=True, match=r'^.*?\.py$')
         f.choices.sort()
         expected = [
-            ('/django/forms/__init__.py', '__init__.py'),
-            ('/django/forms/boundfield.py', 'boundfield.py'),
-            ('/django/forms/fields.py', 'fields.py'),
-            ('/django/forms/forms.py', 'forms.py'),
-            ('/django/forms/formsets.py', 'formsets.py'),
-            ('/django/forms/models.py', 'models.py'),
-            ('/django/forms/renderers.py', 'renderers.py'),
-            ('/django/forms/utils.py', 'utils.py'),
-            ('/django/forms/widgets.py', 'widgets.py')
+            ('/filepathfield_test_dir/__init__.py', '__init__.py'),
+            ('/filepathfield_test_dir/a.py', 'a.py'),
+            ('/filepathfield_test_dir/ab.py', 'ab.py'),
+            ('/filepathfield_test_dir/b.py', 'b.py'),
+            ('/filepathfield_test_dir/c/__init__.py', 'c/__init__.py'),
+            ('/filepathfield_test_dir/c/d.py', 'c/d.py'),
+            ('/filepathfield_test_dir/c/e.py', 'c/e.py'),
+            ('/filepathfield_test_dir/c/f/__init__.py', 'c/f/__init__.py'),
+            ('/filepathfield_test_dir/c/f/g.py', 'c/f/g.py'),
         ]
-        for exp, got in zip(expected, fix_os_paths(f.choices)):
-            with self.subTest(expected=exp):
-                self.assertEqual(exp[1], got[1])
-                self.assertTrue(got[0].endswith(exp[0]))
+        self.assertChoices(f, expected)
 
-    def test_filepathfield_folders(self):
-        path = os.path.abspath(os.path.join(__file__, '..', '..')) + '/tests/filepath_test_files/'
-        f = FilePathField(path=path, allow_folders=True, allow_files=False)
-        f.choices.sort()
-        expected = [
-            ('/forms_tests/tests/filepath_test_files/directory', 'directory'),
-        ]
-        actual = fix_os_paths(f.choices)
-        self.assertEqual(len(expected), len(actual))
-        for exp, got in zip(expected, actual):
-            with self.subTest(expected=exp):
-                self.assertEqual(exp[1], got[1])
-                self.assertTrue(got[0].endswith(exp[0]))
+    def test_allow_folders(self):
+        f = FilePathField(path=self.path, allow_folders=True, allow_files=False)
+        self.assertChoices(f, [
+            ('/filepathfield_test_dir/c', 'c')],
+        )
 
-        f = FilePathField(path=path, allow_folders=True, allow_files=True)
-        f.choices.sort()
-        expected = [
-            ('/forms_tests/tests/filepath_test_files/.dot-file', '.dot-file'),
-            ('/forms_tests/tests/filepath_test_files/1x1.bmp', '1x1.bmp'),
-            ('/forms_tests/tests/filepath_test_files/1x1.png', '1x1.png'),
-            ('/forms_tests/tests/filepath_test_files/directory', 'directory'),
-            ('/forms_tests/tests/filepath_test_files/fake-image.jpg', 'fake-image.jpg'),
-            ('/forms_tests/tests/filepath_test_files/real-text-file.txt', 'real-text-file.txt'),
-        ]
+    def test_recursive_no_folders_or_files(self):
+        f = FilePathField(path=self.path, recursive=True, allow_folders=False, allow_files=False)
+        self.assertChoices(f, [])
 
-        actual = fix_os_paths(f.choices)
-        self.assertEqual(len(expected), len(actual))
-        for exp, got in zip(expected, actual):
-            with self.subTest(expected=exp):
-                self.assertEqual(exp[1], got[1])
-                self.assertTrue(got[0].endswith(exp[0]))
+    def test_recursive_folders_without_files(self):
+        f = FilePathField(path=self.path, recursive=True, allow_folders=True, allow_files=False)
+        self.assertChoices(f, [
+            ('/filepathfield_test_dir/c', 'c'),
+            ('/filepathfield_test_dir/c/f', 'c/f'),
+        ])