Start large refactoring of tests and project structure

* Put tests in tests/ diretory
* Write functional tests
* Create setup.py
* Put sources into django_migration_linter folder (for future PyPi publishing)

tests/unit/test_utils.py

@@ -0,0 +1,41 @@
+# Copyright 2017 3YOURMIND GmbH
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+# http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+from tests import fixtures
+from django_migration_linter import MigrationLinter, valid_folder
+
+
+class UtilityFunctionTest(unittest.TestCase):
+    def test_split_migration_path(self):
+        input_path = 'apps/the_app/migrations/0001_stuff.py'
+        app, mig = MigrationLinter._split_migration_path(input_path)
+        self.assertEqual(app, 'the_app')
+        self.assertEqual(mig, '0001_stuff')
+
+    def test_split_migration_path_2(self):
+        input_path = 'the_app/migrations/0001_stuff.py'
+        app, mig = MigrationLinter._split_migration_path(input_path)
+        self.assertEqual(app, 'the_app')
+        self.assertEqual(mig, '0001_stuff')
+
+    def test_detect_valid_folder(self):
+        self.assertTrue(valid_folder(fixtures.ADD_NOT_NULL_COLUMN_PROJECT))
+
+    def test_detect_not_django_project(self):
+        self.assertFalse(valid_folder(fixtures.NOT_DJANGO_GIT_PROJECT))
+
+    def test_detect_not_git_project(self):
+        self.assertFalse(valid_folder(fixtures.NOT_GIT_DJANGO_PROJECT))