tests: Add initial infrastructure!

Tests now can be done with `python -m test.test_backup --verbose`!
Im going to add more tests as coverage as soon as i've got time! :)

private/test/test_backup.py

@@ -0,0 +1,45 @@
+import sys
+
+sys.path.append('..')
+
+import unittest
+from ListUsers import ListUsers
+import backup
+
+
+class TestBackup(unittest.TestCase):
+    test_csv: str = "test/testbackup.csv"
+    test_db: str = "./test/applications.sqlite"
+
+    def setUp(self):
+        try:
+            self.fetch = ListUsers(self.test_db, unapproved=False, approved=False).get_fetch()
+            self.Backup = backup.Backup(self.test_csv)
+        except Exception as general_setup:
+            self.fail(f"Failed setup already! {general_setup}")
+
+    def test_set_dialect(self):
+        pass
+
+    def test_set_quoting(self):
+        pass
+
+    def test_set_filename(self):
+        self.Backup.set_filename(self.test_csv)
+        self.assertEqual(self.Backup.filename, self.test_csv)
+
+    def test_set_field_names(self):
+        # @TODO: Dynamic! Having a test scheme from which we setup our test is beneficial here, also values
+        self.Backup.set_field_names(self.fetch[0].keys())
+        keys_found = self.Backup.field_names
+        self.assertEqual(keys_found, ['id', 'username', 'email', 'name', 'pubkey', 'timestamp', 'status'])
+
+    def test_backup_to_file(self):
+        try:
+            self.Backup.backup_to_file(self.fetch)
+        except IOError as io_error:
+            self.fail(io_error)
+
+
+if __name__ == '__main__':
+    unittest.main()